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

For one-way options, check prices for Aer Lingus. According to our data, you can fly for as low as £422. Users have also found prices from £464 and £473 on WestJet and Lufthansa, respectively.

What are the most popular routes from London to Delaware?

The most popular route from London to Delaware is London Heathrow - Philadelphia. You may also consider London Gatwick - Philadelphia or London City - Philadelphia.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 56 days in advance, which can save you up to 35% on flights from London to Delaware compared to booking the week you need them. Waiting 56 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £557. For sooner than that we have options available in the next 3 days from £757.

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

Flights from London to Delaware lean towards being more expensive in August. Prices are generally better when you fly from London to Delaware in February, with the cheapest ticket starting at £396.

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

When flying from London to Delaware, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

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

How can I find direct flights from London to Delaware?

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

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

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

£343+ Flights from London to Delaware

Cheap flight deals from London to Delaware

Round-trip from	£343
Popular in	August
Cheapest in	February
Average price	£566

United Airlines
29/5-6/6
4 total stops
47h 59m total
London to Delaware

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (£49 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Find flight deals from London to Delaware

Cheapest flights from London to Delaware
Explore the most affordable flight options available from London to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 April 2025.

Thu 29/509:30LHR - PHL

2 stops18h 59mUnited Airlines

Fri 6/611:00PHL - LHR

2 stops29h 00mUnited Airlines

Deal found 17/4£343

Thu 29/515:50LHR - PHL

1 stop11h 38mMultiple Airlines

Fri 6/607:30PHL - LHR

2 stops18h 00mMultiple Airlines

Deal found 17/4£347

Fri 25/414:05LHR - PHL

1 stop29h 42mAir Canada

Sun 1/607:30PHL - LHR

2 stops18h 00mAir Canada

Deal found 17/4£349

Wed 10/912:10LGW - PHL

1 stop15h 12mJetBlue

Tue 7/1015:00PHL - LGW

1 stop13h 35mJetBlue

Deal found 17/4£414

Wed 5/1108:25LHR - PHL

1 stop31h 12mIcelandair

Wed 12/1111:23PHL - LHR

1 stop13h 32mIcelandair

Deal found 17/4£431

Fri 16/509:30LHR - PHL

1 stop10h 06mLufthansa

Thu 22/515:20PHL - LHR

1 stop13h 40mLufthansa

Deal found 17/4£432

Fri 2/510:05LGW - PHL

1 stop19h 21mMultiple Airlines

Tue 6/517:35PHL - LGW

1 stop32h 20mMultiple Airlines

Deal found 17/4£439

Thu 4/912:10LGW - PHL

1 stop26h 10mIcelandair

Thu 11/915:00PHL - LGW

1 stop13h 35mIcelandair

Deal found 17/4£440

Mon 3/1108:25LHR - PHL

1 stop13h 57mJetBlue

Wed 12/1111:23PHL - LHR

1 stop13h 32mJetBlue

Deal found 17/4£444

Mon 5/511:00LHR - PHL

1 stop18h 46mAmerican Airlines

Mon 19/513:40PHL - LHR

1 stop15h 10mAmerican Airlines

Deal found 18/4£455

Fri 2/508:55LCY - PHL

1 stop12h 05mLufthansa

Tue 6/517:35PHL - LCY

1 stop20h 00mLufthansa

Deal found 17/4£458

Mon 5/510:05LHR - PHL

Nonstop7h 45mFinnair

Tue 20/514:00PHL - LHR

1 stop11h 15mFinnair

Deal found 18/4£464

Best flights from London to Delaware
Discover carefully curated flight deals from London to Delaware that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 April 2025.

Thu 29/509:30LHR - PHL

2 stops18h 59mUnited Airlines

Fri 6/611:00PHL - LHR

2 stops29h 00mUnited Airlines

Deal found 17/4£343

Thu 29/515:50LHR - PHL

1 stop11h 38mMultiple Airlines

Fri 6/607:30PHL - LHR

2 stops18h 00mMultiple Airlines

Deal found 17/4£347

Fri 27/609:30LHR - PHL

1 stop17h 37mAir Canada

Sun 6/710:35PHL - LHR

2 stops14h 55mAir Canada

Deal found 18/4£350

Wed 10/912:10LGW - PHL

1 stop15h 12mJetBlue

Wed 8/1015:00PHL - LGW

1 stop13h 35mJetBlue

Deal found 17/4£414

Fri 16/509:30LHR - PHL

1 stop10h 06mLufthansa

Thu 22/515:20PHL - LHR

1 stop13h 40mLufthansa

Deal found 17/4£432

Thu 4/912:10LGW - PHL

1 stop26h 10mIcelandair

Thu 11/915:00PHL - LGW

1 stop13h 35mIcelandair

Deal found 17/4£440

Wed 7/508:45LHR - PHL

1 stop12h 40mAmerican Airlines

Wed 14/514:00PHL - LHR

1 stop11h 15mAmerican Airlines

Deal found 17/4£457

Fri 2/506:00LHR - PHL

2 stops16h 40mSWISS

Tue 6/510:06PHL - LHR

2 stops16h 49mSWISS

Deal found 17/4£470

Tue 27/508:00LHR - PHL

1 stop10h 40mFinnair

Thu 5/613:55PHL - LHR

1 stop11h 20mFinnair

Deal found 17/4£478

Mon 28/411:30LHR - PHL

2 stops16h 45mVirgin Atlantic

Mon 5/515:15PHL - LHR

1 stop14h 55mVirgin Atlantic

Deal found 17/4£483

Wed 7/512:30LHR - PHL

Nonstop7h 45mBritish Airways

Wed 14/516:05PHL - LHR

1 stop10h 15mBritish Airways

Deal found 16/4£485

Mon 28/409:55LHR - PHL

2 stops15h 56mDelta

Mon 5/516:49PHL - LHR

2 stops13h 36mDelta

Deal found 17/4£501

Direct flights from London to Delaware
Explore direct flight options from London to Delaware based on user searches, and compare prices and availability for your desired travel dates. Data last updated 18 April 2025.

Tue 27/512:30LHR - PHL

Nonstop7h 45mBritish Airways

Thu 5/619:50PHL - LHR

Nonstop7h 15mBritish Airways

Deal found 17/4£495

Mon 28/410:05LHR - PHL

Nonstop7h 45mAmerican Airlines

Mon 5/519:55PHL - LHR

Nonstop7h 10mAmerican Airlines

Deal found 17/4£498

Mon 28/412:30LHR - PHL

Nonstop7h 45mFinnair

Mon 5/519:55PHL - LHR

Nonstop7h 10mFinnair

Deal found 18/4£509

Mon 2/610:05LHR - PHL

Nonstop7h 45mMultiple Airlines

Mon 9/619:50PHL - LHR

Nonstop7h 15mMultiple Airlines

Deal found 18/4£511

Wed 2/713:30LHR - PHL

Nonstop7h 55mIberia

Wed 23/719:30PHL - LHR

Nonstop7h 25mIberia

Deal found 18/4£523

Last-minute flights from London to Delaware
Discover last-minute flight deals from London to Delaware. Data last updated 18 April 2025 and is based on user searches.

Wed 23/409:30LHR - PHL

1 stop10h 17mUnited Airlines

Wed 30/415:30PHL - LHR

1 stop10h 00mUnited Airlines

Deal found 16/4£480

Wed 23/407:50LHR - PHL

1 stop13h 50mBritish Airways

Wed 30/419:35PHL - LHR

Nonstop7h 20mBritish Airways

Deal found 16/4£492

Wed 23/409:45LGW - PHL

1 stop30h 55mMultiple Airlines

Wed 30/420:30PHL - LGW

1 stop12h 40mMultiple Airlines

Deal found 16/4£493

Wed 23/410:35STN - PHL

1 stop30h 05mMultiple Airlines

Wed 30/420:30PHL - STN

1 stop14h 50mMultiple Airlines

Deal found 16/4£495

Wed 23/419:20LTN - PHL

1 stop21h 20mMultiple Airlines

Wed 30/420:30PHL - LTN

1 stop13h 55mMultiple Airlines

Deal found 16/4£505

Thu 24/412:30LHR - PHL

Nonstop7h 45mAmerican Airlines

Thu 1/522:10PHL - LHR

Nonstop7h 10mAmerican Airlines

Deal found 17/4£526

Fri 25/414:05LHR - PHL

1 stop29h 42mAir Canada

Sun 1/607:30PHL - LHR

2 stops18h 00mAir Canada

Deal found 17/4£349

Fri 25/409:30LHR - PHL

1 stop10h 17mAir Canada

Mon 2/607:30PHL - LHR

2 stops18h 00mAir Canada

Deal found 17/4£349

Sat 26/409:30LHR - PHL

1 stop10h 17mLufthansa

Tue 29/412:50PHL - LHR

1 stop12h 30mLufthansa

Deal found 17/4£475

Mon 28/411:30LHR - PHL

2 stops16h 45mVirgin Atlantic

Mon 5/515:15PHL - LHR

1 stop14h 55mVirgin Atlantic

Deal found 17/4£483

Mon 28/410:05LHR - PHL

Nonstop7h 45mMultiple Airlines

Mon 5/518:03PHL - LHR

1 stop10h 32mMultiple Airlines

Deal found 17/4£498

Mon 28/409:55LHR - PHL

2 stops15h 56mDelta

Mon 5/516:49PHL - LHR

2 stops13h 36mDelta

Deal found 17/4£501

One-way flights from London to Delaware
Search for one-way flight options from London to Delaware. Find affordable one-way fares based on user searches. Data last updated 18 April 2025.

Fri 16/509:55LHR - PHL

2 stops30h 03mMultiple Airlines

Deal found 18/4£421

Fri 16/507:40LHR - PHL

1 stop16h 20mAer Lingus

Deal found 17/4£422

Wed 16/708:55LGW - PHL

3 stops30h 48mMultiple Airlines

Deal found 17/4£422

Thu 14/822:55STN - PHL

3 stops28h 12mMultiple Airlines

Deal found 17/4£431

Wed 16/707:00LCY - PHL

3 stops21h 40mMultiple Airlines

Deal found 17/4£437

Thu 15/521:10LTN - PHL

3 stops39h 38mMultiple Airlines

Deal found 17/4£450

Fri 6/614:10LHR - PHL

2 stops32h 54mWestJet

Deal found 17/4£464

Thu 15/508:45LCY - PHL

1 stop12h 15mLufthansa

Deal found 17/4£473

Wed 18/612:30LHR - PHL

Nonstop7h 55mFinnair

Deal found 17/4£489

Tue 17/610:05LHR - PHL

Nonstop7h 55mBritish Airways

Deal found 16/4£489

Wed 2/714:30LGW - PHL

1 stop24h 05mAer Lingus

Deal found 16/4£497

Wed 14/508:25LHR - PHL

1 stop13h 13mJetBlue

Deal found 16/4£513

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to Delaware that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 29/5

09:30-23:29

2 stops18h 59m

Philadelphia

Fri 6/6

11:00-21:00

2 stops29h 00m

£343

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 29/5

15:50-22:28

1 stop11h 38m

Philadelphia

Fri 6/6

07:30-06:30

2 stops18h 00m

£347

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 27/6

14:05-22:07

1 stop13h 02m

Philadelphia

Sun 6/7

10:35-06:30

2 stops14h 55m

£350

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Wed 10/9

12:10-22:22

1 stop15h 12m

Philadelphia

Tue 7/10

15:00-09:35

1 stop13h 35m

£414

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 16/5

09:30-14:36

1 stop10h 06m

Philadelphia

Thu 22/5

15:20-10:00

1 stop13h 40m

£432

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Fri 2/5

10:05-00:26

1 stop19h 21m

Philadelphia

Tue 6/5

17:35-06:55

1 stop32h 20m

£439

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Thu 4/9

12:10-09:20

1 stop26h 10m

Philadelphia

Thu 11/9

15:00-09:35

1 stop13h 35m

£440

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/5

11:00-00:46

1 stop18h 46m

Philadelphia

Mon 19/5

13:40-09:50

1 stop15h 10m

£455

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Fri 2/5

08:55-16:00

1 stop12h 05m

Philadelphia

Tue 6/5

17:35-18:35

1 stop20h 00m

£458

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 2/5

08:25-09:41

1 stop30h 16m

Philadelphia

Mon 5/5

06:00-06:30

1 stop19h 30m

£461

Flights are sorted by cheapest return flights first.

Deals found on 18/4

Showing 1-10 of 60 results

...

Best time to book a flight from London to Delaware

Have a flexible travel schedule? Discover the best time to fly to Delaware 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.

Cheapflights Insights

Everything you need to know about your flight from London to Delaware

Rainfall in Delaware by month

In terms of precipitation, rainfall in Delaware ranges from 73.0 - 108.0 inches per month. July is typically the wettest month, when rainfall can reach 108.0 mm. February is typically the driest time to visit Delaware when rainfall is around 73.0 mm.

Temperature in Delaware by month

If weather is an important factor for your trip to Delaware, 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 25.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

Reviews of airlines servicing Delaware

See what other customers who have flown with Delta, Finnair and Austrian Airlines from London to Delaware have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

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

Delta

8.0

Very Good

7,917 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

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

Finnair

7.6

Good

1,269 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

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

Austrian Airlines

7.6

Good

775 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

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

Air France

7.5

Good

1,435 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

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

SWISS

7.5

Good

1,581 reviews

Delta

8.0

Very Good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

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

Related info for your journey

What are the cheapest airlines to fly from London to Delaware one-way?
For one-way options, check prices for Aer Lingus. According to our data, you can fly for as low as £422. Users have also found prices from £464 and £473 on WestJet and Lufthansa, respectively.
What are the most popular routes from London to Delaware?
The most popular route from London to Delaware is London Heathrow - Philadelphia. You may also consider London Gatwick - Philadelphia or London City - Philadelphia.
Can I find deals for flights from London to Delaware that include hotel bookings?
Yes. In addition to deals on London to Delaware flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London to Delaware?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Delaware.
Can I find deals for business class flights from London to Delaware?
Yes. Cheapflights offers flight deals from London to Delaware by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for London to Delaware

Heathrow to John F Kennedy Intl flights

Heathrow to Newark flights

Gatwick to John F Kennedy Intl flights

Heathrow to LaGuardia flights

London City to John F Kennedy Intl flights

Gatwick to Newark flights

London City to Newark flights

Heathrow to Los Angeles flights

Gatwick to LaGuardia flights

Heathrow to Orlando flights

Heathrow to Boston flights

Stansted to Stewart flights

Heathrow to San Francisco flights

Heathrow to O'Hare Intl flights

Heathrow to Miami flights

Heathrow to Dallas/Fort Worth flights

Manchester to John F Kennedy Intl flights

Manchester to Orlando flights

Stansted to John F Kennedy Intl flights

Heathrow to Seattle flights

Heathrow to Las Vegas flights

Heathrow to Hobby flights

Luton to John F Kennedy Intl flights

Heathrow to Dulles Intl flights

London City to Los Angeles flights

Gatwick to Orlando flights

Heathrow to Baltimore flights

Gatwick to Boston flights

Heathrow to Atlanta flights

Heathrow to George Bush Intcntl flights

Heathrow to Tampa flights

London City to Orlando flights

Manchester to Newark flights

London City to Boston flights

Edinburgh to Newark flights

Heathrow to Raleigh flights

Heathrow to Denver flights

Edinburgh to John F Kennedy Intl flights

Heathrow to Charlotte flights

Manchester to LaGuardia flights

Heathrow to Nashville flights

Gatwick to Los Angeles flights

Gatwick to San Francisco flights

Luton to Los Angeles flights

London City to San Francisco flights

Heathrow to Austin flights

London City to Miami flights

Gatwick to Miami flights

Gatwick to Las Vegas flights

Gatwick to O'Hare Intl flights

Direct flights to United States

Fly with Cheapflights

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

Deals for London to Delaware flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Millions of users choose and trust Cheapflights to book the best flight deals from London to Delaware for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Certainly. Search results for flights to Delaware from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Delaware from London today and book when prices fit your budget.

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Cheap flights from London to Delaware from £343

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/5. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from London to Delaware

Keep the following information in mind while searching for London to Delaware flight deals. Data was last updated 18 April 2025.

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from London to Delaware

Cheapest flights from London to DelawareExplore the most affordable flight options available from London to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 April 2025.

Explore the most affordable flight options available from London to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 April 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to Delaware that are best for you.

Best time to book a flight from London to Delaware

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

Cheapflights Insights

Everything you need to know about your flight from London to Delaware

Rainfall in Delaware by month

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

Temperature in Delaware by month

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

Reviews of airlines servicing Delaware

See what other customers who have flown with Delta, Finnair and Austrian Airlines from London to Delaware have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

What are the most popular routes from London to Delaware?

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

How can I find direct flights from London to Delaware?

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

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.

Alternative routes for London to Delaware

See prices for flight routes from nearby airports that may be better suited for you.

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 Delaware?

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

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

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

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from London to Delaware
Explore the most affordable flight options available from London to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 April 2025.