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 (£425), Lufthansa (£470), and British Airways (£479).

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 35% 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 £549, or £760 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 £567. You can even find prices in February for less than £567, as users have found deals to Delaware from as low as £392. 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 27%.

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.

£421+ Flights from London Heathrow Airport to Delaware

Cheap flight deals from Heathrow to Delaware

Round-trip from	£442
One-way from	£421
Popular in	August
Cheapest in	February
Average price	£561

JetBlue
9/9-23/9
2 total stops
30h 27m total
London to Delaware

Search Deals

27/5
3 total stops
45h 26m total
London to Delaware

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (£47 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 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 29 April 2025.

Tue 9/908:25LHR - PHL

1 stop15h 17mJetBlue

Tue 23/910:20PHL - LHR

1 stop15h 10mJetBlue

Deal found 28/4£442

Tue 13/509:30LHR - PHL

1 stop11h 30mMultiple Airlines

Fri 23/509:45PHL - LHR

1 stop15h 45mMultiple Airlines

Deal found 28/4£452

Mon 5/507:25LHR - PHL

2 stops37h 23mUnited Airlines

Tue 13/509:45PHL - LHR

1 stop19h 15mUnited Airlines

Deal found 28/4£461

Mon 5/512:30LHR - PHL

Nonstop7h 45mAmerican Airlines

Mon 12/514:00PHL - LHR

1 stop11h 15mAmerican Airlines

Deal found 29/4£463

Mon 1/908:25LHR - PHL

1 stop10h 35mFinnair

Mon 8/913:35PHL - LHR

1 stop11h 40mFinnair

Deal found 28/4£466

Tue 9/906:50LHR - PHL

2 stops20h 18mAir Canada

Sun 28/910:35PHL - LHR

1 stop17h 00mAir Canada

Deal found 28/4£472

Thu 22/506:30LHR - PHL

1 stop14h 30mLufthansa

Thu 29/508:31PHL - LHR

1 stop16h 49mLufthansa

Deal found 28/4£475

Wed 7/513:25LHR - PHL

1 stop10h 35mBritish Airways

Wed 14/519:30PHL - LHR

Nonstop7h 25mBritish Airways

Deal found 28/4£478

Wed 10/906:30LHR - PHL

1 stop15h 00mIberia

Wed 24/918:30PHL - LHR

Nonstop7h 10mIberia

Deal found 28/4£514

Wed 10/906:00LHR - PHL

2 stops16h 21mSWISS

Wed 8/1017:35PHL - LHR

2 stops17h 50mSWISS

Deal found 28/4£515

Mon 8/908:40LHR - PHL

2 stops17h 36mDelta

Tue 7/1013:00PHL - LHR

2 stops14h 50mDelta

Deal found 28/4£521

Thu 2/1008:15LHR - PHL

2 stops15h 27mIcelandair

Mon 13/1020:00PHL - LHR

1 stop29h 30mIcelandair

Deal found 29/4£552

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 29 April 2025.

Tue 9/908:25LHR - PHL

1 stop15h 17mJetBlue

Tue 23/910:20PHL - LHR

1 stop15h 10mJetBlue

Deal found 28/4£442

Tue 13/509:30LHR - PHL

1 stop11h 30mMultiple Airlines

Fri 23/509:45PHL - LHR

1 stop15h 45mMultiple Airlines

Deal found 28/4£452

Tue 13/507:45LHR - PHL

1 stop13h 05mFinnair

Tue 15/713:55PHL - LHR

1 stop11h 20mFinnair

Deal found 29/4£460

Tue 13/509:30LHR - PHL

1 stop11h 30mLufthansa

Sun 18/506:15PHL - LHR

2 stops18h 40mLufthansa

Deal found 29/4£461

Thu 11/909:30LHR - PHL

1 stop11h 30mUnited Airlines

Sat 27/910:30PHL - LHR

1 stop19h 10mUnited Airlines

Deal found 28/4£466

Tue 9/906:50LHR - PHL

2 stops20h 18mAir Canada

Thu 25/910:35PHL - LHR

1 stop18h 25mAir Canada

Deal found 28/4£472

Tue 24/618:05LHR - PHL

1 stop20h 20mAmerican Airlines

Tue 8/715:35PHL - LHR

1 stop11h 05mAmerican Airlines

Deal found 29/4£474

Wed 11/612:30LHR - PHL

Nonstop7h 55mBritish Airways

Wed 2/719:35PHL - LHR

Nonstop7h 20mBritish Airways

Deal found 29/4£499

Wed 10/906:30LHR - PHL

1 stop15h 00mIberia

Wed 24/918:30PHL - LHR

Nonstop7h 10mIberia

Deal found 28/4£514

Wed 10/906:00LHR - PHL

2 stops16h 21mSWISS

Wed 8/1017:35PHL - LHR

2 stops17h 50mSWISS

Deal found 28/4£515

Wed 2/706:30LHR - PHL

2 stops19h 21mDelta

Thu 10/717:27PHL - LHR

1 stop12h 03mDelta

Deal found 29/4£523

Mon 12/508:15LHR - PHL

2 stops19h 06mIcelandair

Fri 16/517:30PHL - LHR

1 stop32h 00mIcelandair

Deal found 28/4£559

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 29 April 2025.

Mon 8/912:30LHR - PHL

Nonstop7h 55mBritish Airways

Thu 25/922:20PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 28/4£474

Wed 10/910:05LHR - PHL

Nonstop7h 55mAmerican Airlines

Thu 25/919:50PHL - LHR

Nonstop7h 15mAmerican Airlines

Deal found 28/4£495

Wed 4/610:05LHR - PHL

Nonstop7h 45mMultiple Airlines

Wed 11/622:15PHL - LHR

Nonstop7h 05mMultiple Airlines

Deal found 28/4£514

Tue 9/910:05LHR - PHL

Nonstop7h 55mFinnair

Wed 24/922:20PHL - LHR

Nonstop7h 00mFinnair

Deal found 28/4£526

Wed 4/613:30LHR - PHL

Nonstop7h 55mIberia

Wed 25/619:35PHL - LHR

Nonstop7h 20mIberia

Deal found 28/4£531

Mon 8/913:30LHR - PHL

Nonstop7h 55mAer Lingus

Mon 22/918:30PHL - LHR

Nonstop7h 10mAer Lingus

Deal found 28/4£719

Last-minute flights from Heathrow to Delaware
Discover last-minute flight deals from Heathrow to Delaware. Data last updated 29 April 2025 and is based on user searches.

Mon 5/507:25LHR - PHL

2 stops37h 23mUnited Airlines

Tue 13/506:30PHL - LHR

1 stop18h 50mUnited Airlines

Deal found 28/4£461

Mon 5/512:30LHR - PHL

Nonstop7h 45mAmerican Airlines

Mon 12/514:00PHL - LHR

1 stop11h 15mAmerican Airlines

Deal found 29/4£463

Mon 5/506:50LHR - PHL

2 stops12h 46mMultiple Airlines

Tue 13/509:45PHL - LHR

2 stops18h 50mMultiple Airlines

Deal found 28/4£466

Mon 5/509:30LHR - PHL

1 stop10h 06mAir Canada

Tue 13/509:45PHL - LHR

1 stop15h 45mAir Canada

Deal found 28/4£471

Mon 5/509:30LHR - PHL

1 stop17h 36mLufthansa

Fri 18/708:15PHL - LHR

1 stop17h 05mLufthansa

Deal found 28/4£477

Mon 5/508:40LHR - PHL

2 stops17h 29mDelta

Tue 13/513:00PHL - LHR

2 stops14h 50mDelta

Deal found 28/4£496

Mon 5/512:30LHR - PHL

Nonstop7h 45mFinnair

Fri 18/713:55PHL - LHR

1 stop11h 20mFinnair

Deal found 28/4£504

Mon 5/506:00LHR - PHL

2 stops21h 28mAustrian Airlines

Tue 13/511:05PHL - LHR

2 stops26h 35mAustrian Airlines

Deal found 28/4£599

Mon 5/507:25LHR - PHL

2 stops37h 23mUnited Airlines

Tue 13/509:45PHL - LHR

1 stop19h 15mUnited Airlines

Deal found 28/4£461

Mon 5/509:20LHR - PHL

1 stop14h 00mVirgin Atlantic

Wed 18/612:09PHL - LHR

2 stops19h 26mVirgin Atlantic

Deal found 28/4£511

Tue 6/517:10LHR - PHL

2 stops31h 04mVirgin Atlantic

Wed 18/610:43PHL - LHR

1 stop15h 02mVirgin Atlantic

Deal found 28/4£491

Wed 7/513:25LHR - PHL

1 stop10h 35mBritish Airways

Wed 14/518:00PHL - LHR

1 stop8h 50mBritish Airways

Deal found 28/4£475

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 29 April 2025.

Tue 27/506:10LHR - PHL

3 stops45h 26mMultiple Airlines

Deal found 28/4£421

Mon 7/713:25LHR - PHL

1 stop10h 35mAer Lingus

Deal found 29/4£425

Fri 5/914:05LHR - PHL

1 stop13h 03mLufthansa

Deal found 28/4£470

Tue 26/812:15LHR - PHL

Nonstop7h 55mBritish Airways

Deal found 28/4£479

Mon 12/510:05LHR - PHL

Nonstop7h 45mFinnair

Deal found 29/4£480

Tue 6/512:30LHR - PHL

Nonstop7h 45mIberia

Deal found 27/4£504

Fri 27/616:00LHR - PHL

1 stop11h 29mAustrian Airlines

Deal found 28/4£525

Fri 9/514:10LHR - PHL

2 stops25h 26mWestJet

Deal found 28/4£530

Sun 21/908:25LHR - PHL

1 stop15h 17mJetBlue

Deal found 29/4£542

Fri 5/908:00LHR - PHL

2 stops30h 20mTAP AIR PORTUGAL

Deal found 28/4£568

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 9/9

08:25-18:42

1 stop15h 17m

Philadelphia

Tue 23/9

10:20-06:30

1 stop15h 10m

£442

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 13/5

09:30-16:00

1 stop11h 30m

Philadelphia

Fri 23/5

09:45-06:30

1 stop15h 45m

£452

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 13/5

09:30-16:00

1 stop11h 30m

Philadelphia

Sun 18/5

06:15-05:55

2 stops18h 40m

£461

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 1/9

08:25-14:00

1 stop10h 35m

Philadelphia

Mon 8/9

13:35-06:15

1 stop11h 40m

£466

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 11/9

09:30-16:00

1 stop11h 30m

Philadelphia

Sat 27/9

10:30-10:40

1 stop19h 10m

£466

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 9/9

06:50-22:08

2 stops20h 18m

Philadelphia

Sat 27/9

10:35-11:50

1 stop20h 15m

£472

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 24/6

18:05-09:25

1 stop20h 20m

Philadelphia

Tue 8/7

15:35-07:40

1 stop11h 05m

£474

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 12/5

10:05-12:50

Nonstop7h 45m

Philadelphia

Mon 19/5

16:05-07:50

1 stop10h 45m

£492

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 10/9

06:30-16:30

1 stop15h 00m

Philadelphia

Wed 24/9

18:30-06:40

Nonstop7h 10m

£514

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 10/9

06:00-17:21

2 stops16h 21m

Philadelphia

Tue 7/10

17:35-16:25

2 stops17h 50m

£515

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 24 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.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport 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

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

7,929 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

7,929 reviews

Delta

8.0

Very Good

7,929 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

1,275 reviews

Delta

8.0

Very Good

7,929 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

780 reviews

Delta

8.0

Very Good

7,929 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

1,588 reviews

Delta

8.0

Very Good

7,929 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

8,696 reviews

Delta

8.0

Very Good

7,929 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 (£425), Lufthansa (£470), and British Airways (£479).
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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Luton to John F Kennedy Intl flights

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Gatwick to Orlando flights

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London City to Orlando flights

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London City to Miami flights

Gatwick to Los Angeles flights

Stansted to Newark flights

Gatwick to Miami flights

Gatwick to Dulles Intl flights

Luton to Newark flights

Gatwick to Las Vegas flights

London City to Dulles Intl flights

London City to O'Hare Intl flights

Gatwick to O'Hare Intl flights

Heathrow to Reagan-National flights

Heathrow to Austin flights

London City to Boston flights

London City to LaGuardia flights

Heathrow to Ontario 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 £421

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 27/5. 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 29 April 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 29 April 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 29 April 2025.

Cheapflights Fare Finder

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

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.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport 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

Read through reviews of airlines operating flights from London to Delaware, such as Delta, Finnair and Austrian Airlines. 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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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 29 April 2025.