What are the cheapest airlines flying from London to Philadelphia round-trip?

Cheapflights users have booked flights from London to Philadelphia round-trip from £470. Other airlines that can offer you cheap pricing are Lufthansa, from £471, and United Airlines, from £472. You may be able to fly from London to Philadelphia for 23% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from London to Philadelphia one-way?

£450 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on Finnair and Lufthansa, with prices starting from £463 and £465, respectively.

What are the most popular routes from London to Philadelphia?

When deciding which route to take from London to Philadelphia consider London Heathrow - Philadelphia, London City - Philadelphia or London Gatwick - Philadelphia as they are the most popular.

What are the cheapest flights from London to Philadelphia?

Looking at all options, your cheapest flight can be booked for £485. While the most popular route (London Heathrow - Philadelphia) can be booked for £416 on average our data indicates £1,272 when flying from London to Philadelphia.

What are the most reliable airlines from London to Philadelphia?

Consider Aer Lingus (77%), American Airlines (75%) or Finnair (75%) when booking your flight. These represent the most reliable airlines when flying from London to Philadelphia.

What are the most popular airlines that fly from London to Philadelphia?

Before booking your flight from London to Philadelphia check out the most popular airlines for this route: American Airlines, Air Canada or Royal Air Maroc.

What is the cheapest day to fly round-trip from London to Philadelphia?

Leaving on a Monday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 12% on the overall cost on flights from London to Philadelphia.

How far in advance should I book a flight from London to Philadelphia?

Travelers have found it’s best to book a flight 56 days in advance to save up to 30% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 56 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from London to Philadelphia 1-2 weeks in advance for as low as £575, or £778 for flights within the next 24 hours.

What is the cheapest month to fly from London to Philadelphia?

February is one of the best times of the year to fly to Philadelphia from London. Prices for February average £613 per person but you can even find prices for as low as £428. The most expensive prices can be found in the month of August. Opting for a February flight can save you 21% on your journey compared to booking in August

What airport do you fly into for flights to Philadelphia from London?

If you book a flight to Philadelphia from London, you will be flying to Philadelphia, which is the city’s only airport. Philadelphia (PHL) is located 7.0 mi from the center of Philadelphia. There are 9 flights from London to Philadelphia per day from 12 different airlines.

Can I find deals for flights from London to Philadelphia that include hotel bookings?

Yes. In addition to deals on London to Philadelphia flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from London to Philadelphia?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Philadelphia.

Can I find deals for business class flights from London to Philadelphia?

Yes. Cheapflights offers flight deals from London to Philadelphia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£450+ Flights from London to Philadelphia

The best prices from London to Philadelphia are usually found in February or March, booked 66 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap flight deals from London to Philadelphia

Round-trip from	£470
One-way from	£450
Popular in	August
Cheapest in	February
Average price	£571

SWISS
8/3-17/3
4 total stops
56h 10m total
London to Philadelphia

Search Deals

Aer Lingus
25/4
1 total stop
10h 35m total
London to Philadelphia

Search Deals

High demand for flights, 9% potential price rise

Search Deals

Best time to find cheap flights, 2% potential price drop

Search Deals

Average for round-trip flights in January 2025

Search Deals

Find flight deals from London to Philadelphia

Cheapest flights from London to Philadelphia
Explore the most affordable flight options available from London to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 January 2025.

Sat 8/318:40LHR - PHL

2 stops33h 50mSWISS

Mon 17/316:55PHL - LHR

2 stops22h 20mSWISS

Deal found 20/1£470

Wed 29/109:50LHR - PHL

1 stop11h 50mAmerican Airlines

Sat 8/221:21PHL - LHR

Nonstop6h 59mAmerican Airlines

Deal found 20/1£470

Tue 22/407:50LCY - PHL

1 stop13h 10mLufthansa

Mon 28/417:35PHL - LCY

1 stop20h 00mLufthansa

Deal found 19/1£471

Wed 5/306:30LHR - PHL

1 stop15h 05mMultiple Airlines

Mon 17/319:40PHL - LHR

Nonstop6h 55mMultiple Airlines

Deal found 20/1£471

Sun 16/207:30LHR - PHL

1 stop13h 30mUnited Airlines

Sun 23/217:00PHL - LHR

1 stop33h 55mUnited Airlines

Deal found 19/1£472

Wed 19/209:25LCY - PHL

2 stops17h 09mSWISS

Wed 26/213:00PHL - LCY

2 stops18h 50mSWISS

Deal found 20/1£474

Mon 27/113:10LHR - PHL

Nonstop8h 10mBritish Airways

Sun 2/221:21PHL - LHR

Nonstop6h 59mBritish Airways

Deal found 20/1£474

Fri 7/1118:45LGW - PHL

2 stops31h 47mSWISS

Mon 17/1113:00PHL - LGW

2 stops23h 50mSWISS

Deal found 20/1£478

Wed 29/108:55LHR - PHL

2 stops18h 41mAir Canada

Sat 8/215:30PHL - LHR

1 stop10h 40mAir Canada

Deal found 20/1£479

Thu 30/110:00LHR - PHL

2 stops13h 21mLufthansa

Mon 3/210:35PHL - LHR

2 stops16h 50mLufthansa

Deal found 20/1£482

Mon 27/114:30LHR - PHL

1 stop13h 22mKLM

Mon 3/218:07PHL - LHR

1 stop11h 28mKLM

Deal found 20/1£483

Tue 4/308:25LHR - PHL

1 stop14h 00mJetBlue

Sat 15/310:11PHL - LHR

1 stop15h 44mJetBlue

Deal found 20/1£485

Best flights from London to Philadelphia
Discover carefully curated flight deals from London to Philadelphia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 January 2025.

Sat 8/318:40LHR - PHL

2 stops33h 50mSWISS

Mon 17/316:55PHL - LHR

2 stops22h 20mSWISS

Deal found 20/1£470

Tue 22/407:50LCY - PHL

1 stop13h 10mLufthansa

Mon 28/417:35PHL - LCY

1 stop20h 00mLufthansa

Deal found 19/1£471

Wed 5/306:30LHR - PHL

1 stop15h 05mMultiple Airlines

Tue 18/319:40PHL - LHR

Nonstop6h 55mMultiple Airlines

Deal found 20/1£471

Sun 16/207:30LHR - PHL

1 stop13h 30mUnited Airlines

Sun 23/217:00PHL - LHR

1 stop33h 55mUnited Airlines

Deal found 19/1£472

Thu 6/308:50LHR - PHL

1 stop12h 45mAmerican Airlines

Mon 10/322:15PHL - LHR

Nonstop7h 05mAmerican Airlines

Deal found 20/1£473

Sun 9/218:20LHR - PHL

1 stop27h 20mBritish Airways

Sun 16/221:16PHL - LHR

Nonstop7h 04mBritish Airways

Deal found 19/1£474

Mon 10/208:50LHR - PHL

1 stop13h 10mVirgin Atlantic

Sat 15/218:07PHL - LHR

1 stop31h 13mVirgin Atlantic

Deal found 20/1£479

Mon 21/408:40LHR - PHL

2 stops17h 33mDelta

Mon 28/417:31PHL - LHR

1 stop11h 44mDelta

Deal found 19/1£482

Tue 4/308:25LHR - PHL

1 stop14h 00mJetBlue

Sat 15/310:11PHL - LHR

1 stop15h 44mJetBlue

Deal found 20/1£485

Thu 6/307:20LHR - PHL

1 stop13h 55mIberia

Thu 13/322:15PHL - LHR

Nonstop7h 05mIberia

Deal found 20/1£489

Mon 3/313:10LHR - PHL

Nonstop8h 10mFinnair

Wed 19/322:15PHL - LHR

Nonstop7h 05mFinnair

Deal found 20/1£492

Mon 21/409:30LHR - PHL

1 stop10h 17mAir Canada

Sun 27/415:30PHL - LHR

2 stops34h 00mAir Canada

Deal found 19/1£499

Direct flights from London to Philadelphia
Explore direct flight options from London to Philadelphia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 21 January 2025.

Thu 30/110:15LHR - PHL

Nonstop8h 15mBritish Airways

Mon 3/218:40PHL - LHR

Nonstop6h 55mBritish Airways

Deal found 19/1£474

Mon 17/210:15LHR - PHL

Nonstop8h 05mFinnair

Fri 28/221:16PHL - LHR

Nonstop7h 04mFinnair

Deal found 20/1£483

Thu 30/110:15LHR - PHL

Nonstop8h 15mAmerican Airlines

Mon 10/221:21PHL - LHR

Nonstop6h 59mAmerican Airlines

Deal found 20/1£498

Thu 6/313:10LHR - PHL

Nonstop8h 10mIberia

Thu 13/322:15PHL - LHR

Nonstop7h 05mIberia

Deal found 20/1£506

Wed 4/610:05LHR - PHL

Nonstop7h 45mMultiple Airlines

Mon 16/622:10PHL - LHR

Nonstop7h 10mMultiple Airlines

Deal found 20/1£515

Last-minute flights from London to Philadelphia
Discover last-minute flight deals from London to Philadelphia. Data last updated 21 January 2025 and is based on user searches.

Mon 27/113:10LHR - PHL

Nonstop8h 10mBritish Airways

Sun 2/221:21PHL - LHR

Nonstop6h 59mBritish Airways

Deal found 20/1£474

Mon 27/113:10LHR - PHL

Nonstop8h 10mIberia

Mon 3/218:40PHL - LHR

Nonstop6h 55mIberia

Deal found 20/1£478

Mon 27/114:30LHR - PHL

1 stop13h 22mKLM

Mon 3/218:07PHL - LHR

1 stop11h 28mKLM

Deal found 20/1£483

Mon 27/109:10LCY - PHL

1 stop12h 30mBritish Airways

Mon 3/221:31PHL - LCY

1 stop10h 09mBritish Airways

Deal found 20/1£488

Mon 27/108:55LHR - PHL

2 stops19h 25mVirgin Atlantic

Wed 4/610:45PHL - LHR

1 stop17h 40mVirgin Atlantic

Deal found 20/1£488

Wed 29/109:50LHR - PHL

1 stop11h 50mAmerican Airlines

Sat 8/221:21PHL - LHR

Nonstop6h 59mAmerican Airlines

Deal found 20/1£470

Wed 29/110:00LHR - PHL

2 stops18h 20mDelta

Wed 14/513:00PHL - LHR

2 stops13h 15mDelta

Deal found 20/1£475

Wed 29/108:55LHR - PHL

2 stops18h 41mAir Canada

Sat 8/215:30PHL - LHR

1 stop10h 40mAir Canada

Deal found 20/1£479

Wed 29/113:10LHR - PHL

Nonstop8h 10mFinnair

Sun 4/522:10PHL - LHR

Nonstop7h 10mFinnair

Deal found 20/1£486

Thu 30/107:10LHR - PHL

2 stops16h 11mUnited Airlines

Mon 3/210:10PHL - LHR

2 stops14h 45mUnited Airlines

Deal found 19/1£474

Thu 30/107:30LHR - PHL

1 stop13h 30mMultiple Airlines

Tue 4/217:10PHL - LHR

1 stop13h 05mMultiple Airlines

Deal found 20/1£479

Thu 30/107:00LGW - PHL

2 stops32h 24mMultiple Airlines

Mon 10/209:29PHL - LGW

1 stop19h 31mMultiple Airlines

Deal found 20/1£501

One-way flights from London to Philadelphia
Search for one-way flight options from London to Philadelphia. Find affordable one-way fares based on user searches. Data last updated 21 January 2025.

Fri 25/413:25LHR - PHL

1 stop10h 35mAer Lingus

Deal found 19/1£450

Tue 22/406:20LHR - PHL

3 stops30h 12mMultiple Airlines

Deal found 20/1£461

Sat 8/307:40STN - PHL

2 stops21h 59mMultiple Airlines

Deal found 20/1£462

Wed 26/307:45LTN - PHL

3 stops27h 45mMultiple Airlines

Deal found 20/1£462

Wed 18/609:05LCY - PHL

2 stops13h 42mAer Lingus

Deal found 20/1£463

Mon 3/210:15LHR - PHL

Nonstop8h 15mFinnair

Deal found 20/1£463

Wed 18/609:30LHR - PHL

1 stop11h 30mLufthansa

Deal found 19/1£465

Mon 17/208:50LHR - PHL

1 stop12h 45mBritish Airways

Deal found 20/1£471

Wed 18/609:15LCY - PHL

1 stop11h 45mLufthansa

Deal found 19/1£473

Mon 31/320:40LGW - PHL

1 stop27h 20mMultiple Airlines

Deal found 20/1£476

Mon 27/108:35LCY - PHL

1 stop12h 00mMultiple Airlines

Deal found 20/1£477

Fri 21/214:30LHR - PHL

1 stop13h 06mAustrian Airlines

Deal found 21/1£478

Find flights from London to Philadelphia within your budget

Fly from

Fly to

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 8/3

18:40-23:30

2 stops33h 50m

Philadelphia

Mon 17/3

16:55-19:15

2 stops22h 20m

£470

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Tue 22/4

07:50-16:00

1 stop13h 10m

Philadelphia

Mon 28/4

17:35-18:35

1 stop20h 00m

£471

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 5/3

06:30-16:35

1 stop15h 05m

Philadelphia

Mon 17/3

19:40-06:35

Nonstop6h 55m

£471

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 16/2

07:30-16:00

1 stop13h 30m

Philadelphia

Sun 23/2

17:00-07:55

1 stop33h 55m

£472

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 6/3

08:50-16:35

1 stop12h 45m

Philadelphia

Mon 10/3

22:15-09:20

Nonstop7h 05m

£473

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Wed 19/2

09:25-21:34

2 stops17h 09m

Philadelphia

Wed 26/2

13:00-12:50

2 stops18h 50m

£474

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 30/1

10:15-13:30

Nonstop8h 15m

Philadelphia

Mon 3/2

18:40-06:35

Nonstop6h 55m

£474

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 10/2

08:50-17:00

1 stop13h 10m

Philadelphia

Sat 15/2

18:07-06:20

1 stop31h 13m

£479

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 30/1

10:00-18:21

2 stops13h 21m

Philadelphia

Mon 3/2

10:35-08:25

2 stops16h 50m

£482

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 4/3

08:25-17:25

1 stop14h 00m

Philadelphia

Sat 15/3

10:11-05:55

1 stop15h 44m

£485

Flights are sorted by cheapest return flights first.

Deals found on 19/1

Showing 1-10 of 56 results

...

Best time to book a flight from London to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from London with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from London to Philadelphia

Get recent, data-driven insights about flights from London to Philadelphia including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from London to Philadelphia?

The price you pay for your flight from London to Philadelphia may vary depending on when you book. For the best chance of a lower fare, look to book 66 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from London to Philadelphia?

Currently, March is the cheapest month in which you can book a flight from London to Philadelphia (average of £648). Flying from London to Philadelphia in July is currently the most expensive (average of £839). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LON to PHL?

It’s optimal to fly from London to Philadelphia in the afternoon. By choosing this option you can save up to 13% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from London to Philadelphia?

Travellers seeking maximum savings on their London to Philadelphia flight should consider departing on Thursday afternoons when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London to Philadelphia

The most flights from LON to PHL are scheduled on a Monday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 on average).

Rainfall in Philadelphia by month

In terms of precipitation, rainfall in Philadelphia ranges from 69.0 - 112.0 inches per month. July is typically the wettest month, when rainfall can reach 112.0 mm. February is typically the driest time to visit Philadelphia when rainfall is around 69.0 mm.

Temperature in Philadelphia by month

If weather is an important factor for your trip to Philadelphia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 26.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 1.0 C).

Reviews of airlines servicing Philadelphia

Get a feel of what it's like to fly with SWISS, Lufthansa and United Airlines from London to Philadelphia by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

8,521 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very Good

8,521 reviews

Delta

8.0

Very Good

8,521 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,285 reviews

Delta

8.0

Very Good

8,521 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines

7.6

Good

786 reviews

Delta

8.0

Very Good

8,521 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS

7.5

Good

1,600 reviews

Delta

8.0

Very Good

8,521 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic

7.5

Good

665 reviews

Delta

8.0

Very Good

8,521 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What airport do you fly into for flights to Philadelphia from London?
If you book a flight to Philadelphia from London, you will be flying to Philadelphia, which is the city’s only airport. Philadelphia (PHL) is located 7.0 mi from the center of Philadelphia. There are 9 flights from London to Philadelphia per day from 12 different airlines.
What are the cheapest airlines flying from London to Philadelphia round-trip?
Cheapflights users have booked flights from London to Philadelphia round-trip from £470. Other airlines that can offer you cheap pricing are Lufthansa, from £471, and United Airlines, from £472. You may be able to fly from London to Philadelphia for 23% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from London to Philadelphia one-way?
£450 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on Finnair and Lufthansa, with prices starting from £463 and £465, respectively.
What are the most popular routes from London to Philadelphia?
When deciding which route to take from London to Philadelphia consider London Heathrow - Philadelphia, London City - Philadelphia or London Gatwick - Philadelphia as they are the most popular.
What are the most reliable airlines from London to Philadelphia?
Consider Aer Lingus (77%), American Airlines (75%) or Finnair (75%) when booking your flight. These represent the most reliable airlines when flying from London to Philadelphia.
What are the cheapest flights from London to Philadelphia?
Looking at all options, your cheapest flight can be booked for £485. While the most popular route (London Heathrow - Philadelphia) can be booked for £416 on average our data indicates £1,272 when flying from London to Philadelphia.
Can I find deals for flights from London to Philadelphia that include hotel bookings?
Yes. In addition to deals on London to Philadelphia flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London to Philadelphia?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Philadelphia.
Can I find deals for business class flights from London to Philadelphia?
Yes. Cheapflights offers flight deals from London to Philadelphia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London to Philadelphia?
Currently, March is the cheapest month in which you can book a flight from London to Philadelphia (average of £648). Flying from London to Philadelphia in July is currently the most expensive (average of £839). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from London to Philadelphia

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£367	Average£511	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
JetBlue	Cheapest£389	Average£546	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Air Canada	Cheapest£419	Average£567	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
British Airways	Cheapest£476	Average£661	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Lufthansa	Cheapest£477	Average£598	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£482	Average£631	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
American Airlines	Cheapest£488	Average£661	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Finnair	Cheapest£489	Average£611	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Virgin Atlantic	Cheapest£491	Average£693	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Aer Lingus	Cheapest£491	Average£659	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

Fly with Cheapflights

How does Cheapflights help users find flights from London to Philadelphia?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Philadelphia from London today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from London to Philadelphia?

Cheapflights helps you find that perfect flight to Philadelphia from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from London to Philadelphia with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to Philadelphia flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from London to Philadelphia become cheaper?

Of course! You can now track prices for flights from London to Philadelphia and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from London to Philadelphia from £450

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 25/4. Fares are subject to change and may not be available on all flights or dates of travel.

The best prices from London to Philadelphia are usually found in February or March, booked 66 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap flight deals from London to Philadelphia

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from London to Philadelphia

Cheapest flights from London to PhiladelphiaExplore the most affordable flight options available from London to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 January 2025.

Explore the most affordable flight options available from London to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 January 2025.

Find flights from London to Philadelphia within your budget

Best time to book a flight from London to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from London with our price prediction graph.

Travel insights for flights from London to Philadelphia

Get recent, data-driven insights about flights from London to Philadelphia including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from London to Philadelphia?

Use this chart to determine the optimal time to book a return flight from London to Philadelphia. Price data was last updated on 17 January 2025.

What is the cheapest month to book a flight from London to Philadelphia?

What is the cheapest time of day to fly from LON to PHL?

Find hourly flight availability from London to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 January 2025.

What is the cheapest day to fly from London to Philadelphia?

Use this chart to determine the cheapest time to fly return from London to Philadelphia. Price data was last updated on 16 December 2024.

Weekly flight availability from London to Philadelphia

Explore weekly flight availability from London to Philadelphia. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 21 January 2025.

Rainfall in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average rainfall totals by month.

Temperature in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average temperature totals by month.

Reviews of airlines servicing Philadelphia

Related info for your journey

Find useful and relevant information for your journey from London to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Philadelphia from London?

What are the cheapest airlines flying from London to Philadelphia round-trip?

What are the cheapest airlines to fly from London to Philadelphia one-way?

What are the most popular routes from London to Philadelphia?

What are the most reliable airlines from London to Philadelphia?

What are the cheapest flights from London to Philadelphia?

Can I find deals for flights from London to Philadelphia that include hotel bookings?

How can I find direct flights from London to Philadelphia?

Can I find deals for business class flights from London to Philadelphia?

What is the cheapest month to book a flight from London to Philadelphia?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly from London to Philadelphia on these airlines

Choose from the following airlines for your flight from London to Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on 21 January 2025.

Top 10 airlines flying from London to Philadelphia

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Philadelphia?

Why should you use Cheapflights to find cheap flight tickets from London to Philadelphia?

Can Cheapflights find flights from London to Philadelphia with no change fees?

Can Cheapflights notify me if prices for flights from London to Philadelphia become cheaper?

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from London to Philadelphia
Explore the most affordable flight options available from London to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 January 2025.