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

The cheapet airlines for a one-way flight from London Heathrow Airport to Delaware are Aer Lingus (£416), WestJet (£467), and British Airways (£507).

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

Travelers have found it’s best to book a flight 56 days in advance to save up to 33% 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 Heathrow Airport to Delaware 1-2 weeks in advance for as low as £577, or £759 for flights within the next 24 hours.

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

The best pricing can be found in the month of February. Prices to Delaware from London Heathrow Airport average £600. You can even find prices in February for less than £600, as users have found deals to Delaware from as low as £417. The month of August appears to be one of the more expensive times to travel to Delaware from London Heathrow Airport. Flying in the targeted month can save you up to 25%.

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

When flying from London Heathrow Airport 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 Heathrow to Delaware that include hotel bookings?

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

How can I find direct flights from Heathrow to Delaware?

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

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

Yes. Cheapflights offers flight deals from Heathrow 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.

£396+ Flights from London Heathrow Airport to Delaware

Cheap flight deals from Heathrow to Delaware

Round-trip from	£452
One-way from	£396
Popular in	August
Cheapest in	February
Average price	£527

Finnair
20/3-27/3
2 total stops
29h 00m total
London to Delaware

Search Deals

20/3
2 total stops
43h 31m total
London to Delaware

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (£56 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 February 2025

Search Deals

Find flight deals from Heathrow to Delaware

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

Wed 10/908:25LHR - PHL

1 stop14h 17mJetBlue

Tue 16/910:25PHL - LHR

1 stop15h 05mJetBlue

Deal found 20/2£446

Thu 20/307:20LHR - PHL

1 stop14h 00mFinnair

Thu 27/313:40PHL - LHR

1 stop15h 00mFinnair

Deal found 20/2£452

Thu 6/306:30LHR - PHL

2 stops38h 15mUnited Airlines

Fri 21/310:35PHL - LHR

2 stops16h 35mUnited Airlines

Deal found 20/2£455

Sat 1/318:00LHR - PHL

1 stop33h 36mLufthansa

Wed 30/417:35PHL - LHR

1 stop19h 05mLufthansa

Deal found 20/2£457

Wed 7/510:05LHR - PHL

Nonstop7h 45mAmerican Airlines

Wed 14/513:50PHL - LHR

1 stop11h 25mAmerican Airlines

Deal found 20/2£461

Fri 9/506:00LHR - PHL

2 stops16h 40mMultiple Airlines

Wed 14/515:10PHL - LHR

1 stop10h 45mMultiple Airlines

Deal found 20/2£471

Thu 20/308:55LHR - PHL

2 stops17h 41mAir Canada

Thu 27/315:30PHL - LHR

2 stops14h 35mAir Canada

Deal found 20/2£477

Wed 26/206:30LHR - PHL

1 stop15h 05mBritish Airways

Wed 5/316:05PHL - LHR

1 stop10h 45mBritish Airways

Deal found 19/2£482

Mon 3/306:30LHR - PHL

2 stops14h 35mDelta

Mon 10/312:28PHL - LHR

2 stops14h 27mDelta

Deal found 19/2£497

Sun 6/417:10LHR - PHL

2 stops51h 50mSWISS

Sun 13/417:35PHL - LHR

2 stops33h 20mSWISS

Deal found 20/2£547

Mon 9/613:30LHR - PHL

Nonstop7h 55mIberia

Thu 19/618:30PHL - LHR

Nonstop7h 10mIberia

Deal found 20/2£565

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

Thu 20/307:20LHR - PHL

1 stop14h 00mFinnair

Thu 27/313:40PHL - LHR

1 stop15h 00mFinnair

Deal found 20/2£452

Thu 6/306:30LHR - PHL

2 stops38h 15mUnited Airlines

Fri 21/315:30PHL - LHR

1 stop11h 40mUnited Airlines

Deal found 20/2£455

Wed 23/408:25LHR - PHL

1 stop17h 14mJetBlue

Mon 28/415:55PHL - LHR

1 stop9h 35mJetBlue

Deal found 20/2£457

Fri 25/409:30LHR - PHL

1 stop11h 30mLufthansa

Thu 1/517:35PHL - LHR

1 stop11h 05mLufthansa

Deal found 20/2£458

Wed 7/510:05LHR - PHL

Nonstop7h 45mAmerican Airlines

Wed 14/513:50PHL - LHR

1 stop11h 25mAmerican Airlines

Deal found 20/2£461

Fri 9/506:00LHR - PHL

2 stops16h 40mMultiple Airlines

Wed 14/515:10PHL - LHR

1 stop10h 45mMultiple Airlines

Deal found 20/2£471

Thu 20/308:55LHR - PHL

2 stops17h 41mAir Canada

Thu 27/315:30PHL - LHR

2 stops14h 35mAir Canada

Deal found 20/2£477

Wed 23/410:05LHR - PHL

Nonstop7h 45mBritish Airways

Mon 28/414:47PHL - LHR

1 stop12h 03mBritish Airways

Deal found 20/2£482

Mon 3/311:45LHR - PHL

2 stops16h 35mDelta

Mon 10/317:33PHL - LHR

1 stop10h 22mDelta

Deal found 19/2£497

Mon 14/410:05LHR - PHL

Nonstop7h 45mIberia

Wed 18/618:30PHL - LHR

Nonstop7h 10mIberia

Deal found 20/2£539

Sun 6/417:10LHR - PHL

2 stops51h 50mSWISS

Sun 13/417:35PHL - LHR

2 stops33h 20mSWISS

Deal found 20/2£547

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

Wed 23/412:30LHR - PHL

Nonstop7h 45mFinnair

Mon 28/419:55PHL - LHR

Nonstop7h 10mFinnair

Deal found 20/2£475

Mon 3/310:15LHR - PHL

Nonstop8h 05mMultiple Airlines

Mon 10/319:40PHL - LHR

Nonstop6h 55mMultiple Airlines

Deal found 20/2£481

Wed 12/310:15LHR - PHL

Nonstop7h 50mBritish Airways

Wed 19/322:15PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 19/2£487

Wed 5/310:15LHR - PHL

Nonstop8h 05mAmerican Airlines

Wed 12/322:15PHL - LHR

Nonstop7h 05mAmerican Airlines

Deal found 19/2£497

Mon 9/613:30LHR - PHL

Nonstop7h 55mIberia

Thu 19/618:30PHL - LHR

Nonstop7h 10mIberia

Deal found 20/2£565

Last-minute flights from Heathrow to Delaware
Discover last-minute flight deals from Heathrow to Delaware. Data last updated 21 February 2025 and is based on user searches.

Sun 23/219:35LHR - PHL

2 stops30h 48mAir France

Thu 27/211:20PHL - LHR

1 stop14h 45mAir France

Deal found 20/2£774

Tue 25/208:25LHR - PHL

1 stop14h 00mJetBlue

Mon 3/310:12PHL - LHR

1 stop14h 43mJetBlue

Deal found 20/2£617

Tue 25/208:50LHR - PHL

2 stops13h 35mAer Lingus

Mon 3/317:30PHL - LHR

1 stop10h 35mAer Lingus

Deal found 20/2£701

Tue 25/221:05LHR - PHL

3 stops29h 18mScandinavian Airlines

Mon 3/315:55PHL - LHR

2 stops24h 45mScandinavian Airlines

Deal found 20/2£1,797

Wed 26/206:30LHR - PHL

1 stop15h 05mBritish Airways

Wed 5/316:05PHL - LHR

1 stop10h 45mBritish Airways

Deal found 19/2£482

Wed 26/210:15LHR - PHL

Nonstop8h 05mMultiple Airlines

Wed 5/318:40PHL - LHR

Nonstop6h 55mMultiple Airlines

Deal found 19/2£597

Wed 26/220:40LHR - PHL

2 stops25h 45mIcelandair

Thu 6/306:00PHL - LHR

2 stops23h 50mIcelandair

Deal found 20/2£4,483

Sat 1/318:00LHR - PHL

1 stop33h 36mLufthansa

Wed 30/417:35PHL - LHR

1 stop19h 05mLufthansa

Deal found 20/2£457

Sat 1/315:00LHR - PHL

1 stop28h 50mUnited Airlines

Wed 30/410:43PHL - LHR

2 stops14h 47mUnited Airlines

Deal found 20/2£482

Sat 1/307:50LHR - PHL

1 stop13h 45mAmerican Airlines

Wed 30/422:10PHL - LHR

Nonstop7h 10mAmerican Airlines

Deal found 20/2£501

Sat 1/318:00LHR - PHL

2 stops25h 50mAir Canada

Wed 30/416:25PHL - LHR

2 stops12h 35mAir Canada

Deal found 20/2£503

Sat 1/310:15LHR - PHL

Nonstop8h 05mFinnair

Wed 30/422:10PHL - LHR

Nonstop7h 10mFinnair

Deal found 20/2£506

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

Thu 20/307:10LHR - PHL

2 stops43h 31mMultiple Airlines

Deal found 20/2£396

Sun 2/308:50LHR - PHL

1 stop12h 10mAer Lingus

Deal found 20/2£416

Mon 21/413:55LHR - PHL

2 stops33h 05mWestJet

Deal found 19/2£467

Wed 11/612:30LHR - PHL

Nonstop7h 50mBritish Airways

Deal found 19/2£507

Fri 21/310:15LHR - PHL

Nonstop7h 50mFinnair

Deal found 20/2£508

Tue 18/308:25LHR - PHL

1 stop12h 59mJetBlue

Deal found 19/2£511

Wed 26/310:15LHR - PHL

Nonstop7h 55mIberia

Deal found 20/2£513

Thu 27/214:30LHR - PHL

1 stop13h 06mLufthansa

Deal found 20/2£552

Thu 22/506:00LHR - PHL

2 stops22h 27mTAP AIR PORTUGAL

Deal found 19/2£574

Wed 18/607:45LHR - PHL

2 stops13h 15mBrussels Airlines

Deal found 19/2£619

Sun 16/310:15LHR - PHL

Nonstop7h 50mAmerican Airlines

Deal found 20/2£658

Find flights from Heathrow to Delaware within your budget

Fly from

Fly to

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 20/3

07:20-17:20

1 stop14h 00m

Philadelphia

Thu 27/3

13:40-08:40

1 stop15h 00m

£452

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 6/3

06:30-15:45

2 stops38h 15m

Philadelphia

Fri 21/3

15:30-07:10

1 stop11h 40m

£455

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 23/4

08:25-20:39

1 stop17h 14m

Philadelphia

Mon 28/4

15:55-06:30

1 stop9h 35m

£457

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 25/4

09:30-16:00

1 stop11h 30m

Philadelphia

Thu 1/5

17:35-09:40

1 stop11h 05m

£458

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 7/5

10:05-12:50

Nonstop7h 45m

Philadelphia

Wed 14/5

13:50-06:15

1 stop11h 25m

£461

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 9/5

06:00-17:40

2 stops16h 40m

Philadelphia

Wed 14/5

15:10-06:55

1 stop10h 45m

£471

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 20/3

08:55-22:36

2 stops17h 41m

Philadelphia

Thu 27/3

15:30-10:05

2 stops14h 35m

£477

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 23/4

10:05-12:50

Nonstop7h 45m

Philadelphia

Mon 28/4

14:47-07:50

1 stop12h 03m

£482

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 3/3

11:45-23:20

2 stops16h 35m

Philadelphia

Mon 10/3

17:33-07:55

1 stop10h 22m

£497

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 6/4

17:10-16:00

2 stops51h 50m

Philadelphia

Sun 13/4

17:35-07:55

2 stops33h 20m

£547

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Showing 1-10 of 22 results

Best time to book a flight from Heathrow to Delaware

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

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

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

Read through reviews of airlines operating flights from London to Delaware, such as Delta, Finnair and SWISS. 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

8,213 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

8,213 reviews

Delta

8.0

Very Good

8,213 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

1,273 reviews

Delta

8.0

Very Good

8,213 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

1,568 reviews

Delta

8.0

Very Good

8,213 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

United Airlines

7.4

Good

8,759 reviews

Delta

8.0

Very Good

8,213 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

JetBlue

7.4

Good

3,069 reviews

Delta

8.0

Very Good

8,213 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 Heathrow Airport to Delaware one-way?
The cheapet airlines for a one-way flight from London Heathrow Airport to Delaware are Aer Lingus (£416), WestJet (£467), and British Airways (£507).
Can I find deals for flights from Heathrow to Delaware that include hotel bookings?
Yes. In addition to deals on Heathrow to Delaware flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Delaware?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Delaware.
Can I find deals for business class flights from Heathrow to Delaware?
Yes. Cheapflights offers flight deals from Heathrow 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 Heathrow to Delaware

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Heathrow to Newark flights

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Luton to John F Kennedy Intl flights

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Heathrow to Dulles Intl flights

Heathrow to San Francisco flights

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Gatwick to Orlando flights

Heathrow to Baltimore flights

Luton to Stewart flights

London City to Miami flights

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London City to Los Angeles flights

London City to Orlando flights

Heathrow to Atlanta flights

Heathrow to Hobby flights

Gatwick to Boston flights

Heathrow to Tampa flights

Gatwick to Miami flights

Heathrow to Nashville flights

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Luton to Newark flights

Heathrow to Austin flights

London City to Boston flights

Heathrow to Denver flights

Heathrow to George Bush Intcntl flights

London City to Las Vegas flights

Gatwick to San Francisco flights

Gatwick to O'Hare Intl flights

London City to San Francisco flights

Heathrow to Midway flights

Heathrow to Charlotte flights

London City to O'Hare Intl flights

Heathrow to Ontario flights

Stansted to Boston flights

Gatwick to Dulles Intl flights

Heathrow to Sky Harbor Intl flights

Direct flights to United States

Fly with Cheapflights

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

Cheapflights makes it easy to find Heathrow to Delaware flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Delaware.

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

Need flexible booking options for your flight to Delaware from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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Cheap flights from London Heathrow Airport to Delaware from £396

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 20/3. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Delaware

Keep the following information in mind while searching for Heathrow to Delaware flight deals. Data was last updated 21 February 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Heathrow to Delaware

Cheapest flights from Heathrow to DelawareExplore the most affordable flight options available from Heathrow to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2025.

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

Find flights from Heathrow to Delaware within your budget

Best time to book a flight from Heathrow to Delaware

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

Travel insights for flights from Heathrow to Delaware

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

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

Read through reviews of airlines operating flights from London to Delaware, such as Delta, Finnair and SWISS. 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 Heathrow 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 Heathrow Airport to Delaware one-way?

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

How can I find direct flights from Heathrow to Delaware?

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

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

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

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

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Travel Smart

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