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 (£424), Finnair (£492), and Iberia (£501).

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 34% 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 £568, or £776 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 £588. You can even find prices in February for less than £588, as users have found deals to Delaware from as low as £405. 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.

£423+ Flights from London Heathrow Airport to Delaware

Cheap flight deals from Heathrow to Delaware

Round-trip from	£449
One-way from	£423
Popular in	August
Cheapest in	February
Average price	£542

Air Canada
19/6-23/6
4 total stops
32h 54m total
London to Delaware

Search Deals

22/5
2 total stops
23h 53m total
London to Delaware

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (£54 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 March 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 25 March 2025.

Thu 19/609:30LHR - PHL

2 stops17h 59mAir Canada

Mon 23/610:35PHL - LHR

2 stops14h 55mAir Canada

Deal found 24/3£449

Wed 7/508:45LHR - PHL

1 stop12h 40mAmerican Airlines

Wed 14/514:00PHL - LHR

1 stop11h 15mAmerican Airlines

Deal found 24/3£451

Thu 8/507:25LHR - PHL

2 stops20h 03mUnited Airlines

Thu 15/510:44PHL - LHR

2 stops18h 26mUnited Airlines

Deal found 24/3£454

Thu 1/508:25LHR - PHL

1 stop19h 03mIcelandair

Mon 5/506:00PHL - LHR

1 stop19h 30mIcelandair

Deal found 24/3£456

Mon 28/409:30LHR - PHL

1 stop11h 30mLufthansa

Mon 5/517:35PHL - LHR

1 stop11h 05mLufthansa

Deal found 24/3£461

Mon 5/506:30LHR - PHL

1 stop14h 30mMultiple Airlines

Sun 15/615:20PHL - LHR

1 stop12h 15mMultiple Airlines

Deal found 24/3£469

Mon 21/410:05LHR - PHL

Nonstop7h 45mBritish Airways

Mon 28/419:55PHL - LHR

Nonstop7h 10mBritish Airways

Deal found 24/3£471

Mon 21/412:30LHR - PHL

Nonstop7h 45mFinnair

Mon 28/419:55PHL - LHR

Nonstop7h 10mFinnair

Deal found 24/3£501

Tue 1/411:45LHR - PHL

2 stops35h 37mVirgin Atlantic

Wed 16/417:49PHL - LHR

1 stop14h 41mVirgin Atlantic

Deal found 24/3£503

Tue 8/408:40LHR - PHL

2 stops19h 35mDelta

Wed 16/406:00PHL - LHR

1 stop21h 55mDelta

Deal found 24/3£524

Thu 8/518:40LHR - PHL

2 stops28h 00mSWISS

Thu 15/517:35PHL - LHR

2 stops17h 50mSWISS

Deal found 23/3£526

Thu 10/409:40LHR - PHL

1 stop12h 14mAir France

Tue 15/419:25PHL - LHR

1 stop13h 05mAir France

Deal found 24/3£569

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 25 March 2025.

Thu 19/609:30LHR - PHL

2 stops17h 59mAir Canada

Mon 23/610:35PHL - LHR

2 stops14h 55mAir Canada

Deal found 24/3£449

Wed 7/508:45LHR - PHL

1 stop12h 40mAmerican Airlines

Wed 14/514:00PHL - LHR

1 stop11h 15mAmerican Airlines

Deal found 24/3£451

Thu 8/507:25LHR - PHL

2 stops20h 03mUnited Airlines

Thu 15/510:44PHL - LHR

2 stops18h 26mUnited Airlines

Deal found 24/3£454

Thu 1/508:25LHR - PHL

1 stop19h 03mIcelandair

Mon 5/506:00PHL - LHR

1 stop19h 30mIcelandair

Deal found 24/3£456

Mon 28/409:30LHR - PHL

1 stop11h 30mLufthansa

Mon 5/517:35PHL - LHR

1 stop11h 05mLufthansa

Deal found 24/3£461

Mon 5/506:30LHR - PHL

1 stop14h 30mMultiple Airlines

Sun 15/615:20PHL - LHR

1 stop12h 15mMultiple Airlines

Deal found 24/3£469

Mon 21/410:05LHR - PHL

Nonstop7h 45mBritish Airways

Mon 28/419:55PHL - LHR

Nonstop7h 10mBritish Airways

Deal found 24/3£471

Mon 28/410:05LHR - PHL

Nonstop7h 45mIberia

Mon 5/519:55PHL - LHR

Nonstop7h 10mIberia

Deal found 24/3£500

Mon 21/412:30LHR - PHL

Nonstop7h 45mFinnair

Mon 28/419:55PHL - LHR

Nonstop7h 10mFinnair

Deal found 24/3£501

Mon 21/420:05LHR - PHL

2 stops24h 55mSWISS

Mon 28/417:35PHL - LHR

2 stops14h 25mSWISS

Deal found 24/3£507

Tue 8/408:40LHR - PHL

2 stops19h 35mDelta

Wed 16/406:00PHL - LHR

1 stop21h 55mDelta

Deal found 24/3£524

Wed 9/409:40LHR - PHL

1 stop12h 14mVirgin Atlantic

Sat 12/415:58PHL - LHR

1 stop33h 47mVirgin Atlantic

Deal found 24/3£546

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 25 March 2025.

Mon 21/410:05LHR - PHL

Nonstop7h 45mBritish Airways

Mon 28/419:55PHL - LHR

Nonstop7h 10mBritish Airways

Deal found 24/3£471

Mon 21/410:05LHR - PHL

Nonstop7h 45mFinnair

Mon 28/422:10PHL - LHR

Nonstop7h 10mFinnair

Deal found 22/3£474

Tue 22/410:05LHR - PHL

Nonstop7h 45mMultiple Airlines

Mon 5/518:30PHL - LHR

Nonstop7h 10mMultiple Airlines

Deal found 23/3£479

Mon 21/412:30LHR - PHL

Nonstop7h 45mAmerican Airlines

Mon 28/419:55PHL - LHR

Nonstop7h 10mAmerican Airlines

Deal found 24/3£498

Wed 11/612:30LHR - PHL

Nonstop7h 55mIberia

Wed 25/622:15PHL - LHR

Nonstop7h 05mIberia

Deal found 24/3£534

Last-minute flights from Heathrow to Delaware
Discover last-minute flight deals from Heathrow to Delaware. Data last updated 25 March 2025 and is based on user searches.

Fri 28/308:25LHR - PHL

1 stop12h 59mIcelandair

Mon 31/306:00PHL - LHR

1 stop19h 30mIcelandair

Deal found 24/3£626

Sun 30/308:15LHR - PHL

2 stops28h 24mIcelandair

Thu 3/406:00PHL - LHR

2 stops22h 30mIcelandair

Deal found 24/3£669

Sun 30/308:25LHR - PHL

1 stop17h 15mJetBlue

Mon 14/408:34PHL - LHR

1 stop16h 56mJetBlue

Deal found 24/3£739

Tue 1/410:25LHR - PHL

1 stop13h 35mBritish Airways

Tue 15/422:10PHL - LHR

Nonstop7h 10mBritish Airways

Deal found 24/3£476

Tue 1/411:45LHR - PHL

2 stops35h 37mVirgin Atlantic

Wed 16/417:49PHL - LHR

1 stop14h 41mVirgin Atlantic

Deal found 24/3£503

Tue 1/409:30LHR - PHL

1 stop10h 17mMultiple Airlines

Wed 16/412:50PHL - LHR

1 stop12h 30mMultiple Airlines

Deal found 24/3£517

Tue 1/410:05LHR - PHL

Nonstop7h 55mFinnair

Wed 16/418:40PHL - LHR

1 stop12h 50mFinnair

Deal found 24/3£534

Tue 1/413:25LHR - PHL

1 stop10h 35mAer Lingus

Thu 17/420:30PHL - LHR

1 stop11h 10mAer Lingus

Deal found 24/3£762

Tue 1/406:40LHR - PHL

2 stops19h 35mScandinavian Airlines

Thu 17/413:24PHL - LHR

2 stops21h 36mScandinavian Airlines

Deal found 24/3£801

Wed 2/414:05LHR - PHL

2 stops33h 54mUnited Airlines

Wed 16/409:31PHL - LHR

1 stop15h 49mUnited Airlines

Deal found 24/3£463

Thu 3/409:30LHR - PHL

1 stop10h 17mAir Canada

Tue 8/415:30PHL - LHR

1 stop10h 00mAir Canada

Deal found 24/3£489

Thu 3/409:55LHR - PHL

2 stops16h 29mDelta

Sat 12/405:30PHL - LHR

1 stop20h 15mDelta

Deal found 24/3£587

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 25 March 2025.

Thu 22/506:00LHR - PHL

2 stops23h 53mMultiple Airlines

Deal found 24/3£423

Wed 7/512:00LHR - PHL

1 stop12h 00mAer Lingus

Deal found 24/3£424

Wed 9/412:30LHR - PHL

Nonstop7h 45mIberia

Deal found 24/3£492

Mon 31/312:30LHR - PHL

Nonstop7h 50mFinnair

Deal found 24/3£503

Tue 22/408:25LHR - PHL

1 stop17h 50mJetBlue

Deal found 24/3£513

Wed 11/610:05LHR - PHL

Nonstop7h 55mBritish Airways

Deal found 25/3£518

Wed 21/508:25LHR - PHL

1 stop13h 13mIcelandair

Deal found 24/3£520

Sun 20/408:30LHR - PHL

1 stop12h 13mAustrian Airlines

Deal found 25/3£535

Sat 28/614:10LHR - PHL

2 stops38h 48mWestJet

Deal found 24/3£551

Wed 11/606:00LHR - PHL

2 stops22h 27mTAP AIR PORTUGAL

Deal found 25/3£562

Sun 20/410:05LHR - PHL

Nonstop7h 45mMalaysia Airlines

Deal found 25/3£564

Sun 6/409:30LHR - PHL

1 stop10h 17mLufthansa

Deal found 24/3£626

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

Thu 19/6

09:30-22:29

2 stops17h 59m

Philadelphia

Mon 23/6

10:35-06:30

2 stops14h 55m

£449

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 7/5

08:45-16:25

1 stop12h 40m

Philadelphia

Wed 14/5

14:00-06:15

1 stop11h 15m

£451

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 8/5

07:25-22:28

2 stops20h 03m

Philadelphia

Thu 15/5

10:44-10:10

2 stops18h 26m

£454

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 1/5

08:25-22:28

1 stop19h 03m

Philadelphia

Mon 5/5

06:00-06:30

1 stop19h 30m

£456

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 28/4

09:30-16:00

1 stop11h 30m

Philadelphia

Mon 5/5

17:35-09:40

1 stop11h 05m

£461

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/5

06:30-16:00

1 stop14h 30m

Philadelphia

Sun 15/6

15:20-08:35

1 stop12h 15m

£469

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 21/4

10:05-12:50

Nonstop7h 45m

Philadelphia

Mon 28/4

19:55-08:05

Nonstop7h 10m

£471

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 28/4

10:05-12:50

Nonstop7h 45m

Philadelphia

Mon 5/5

19:55-08:05

Nonstop7h 10m

£500

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 21/4

20:05-16:00

2 stops24h 55m

Philadelphia

Mon 28/4

17:35-13:00

2 stops14h 25m

£507

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 16/6

07:05-16:15

1 stop14h 10m

Philadelphia

Mon 30/6

19:35-08:05

Nonstop7h 30m

£511

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 28 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

7,890 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

7,890 reviews

Delta

8.0

Very Good

7,890 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

1,266 reviews

Delta

8.0

Very Good

7,890 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

7.5

Good

769 reviews

Delta

8.0

Very Good

7,890 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

1,569 reviews

Delta

8.0

Very Good

7,890 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

7.4

Good

1,423 reviews

Delta

8.0

Very Good

7,890 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 (£424), Finnair (£492), and Iberia (£501).
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

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

Stansted to Stewart flights

Heathrow to Miami flights

Heathrow to Los Angeles flights

Heathrow to Orlando flights

Heathrow to Boston flights

Gatwick to LaGuardia flights

Heathrow to San Francisco flights

Heathrow to Dallas/Fort Worth flights

Heathrow to Las Vegas flights

Heathrow to O'Hare Intl flights

Stansted to John F Kennedy Intl flights

Heathrow to Stewart flights

Heathrow to Dulles Intl flights

London City to Miami flights

Gatwick to Orlando flights

Luton to John F Kennedy Intl flights

London City to Los Angeles flights

Gatwick to Miami flights

Heathrow to Seattle flights

Heathrow to Baltimore flights

Gatwick to Los Angeles flights

Stansted to Newark flights

Gatwick to Boston flights

Heathrow to Hobby flights

Heathrow to Atlanta flights

London City to Orlando flights

Heathrow to Tampa flights

London City to Boston flights

Luton to Newark flights

Luton to Los Angeles flights

Heathrow to George Bush Intcntl flights

Gatwick to San Francisco flights

Gatwick to Las Vegas flights

Luton to Stewart flights

Heathrow to Nashville flights

London City to San Francisco flights

Heathrow to Ontario flights

Gatwick to Stewart flights

Stansted to Miami flights

Gatwick to O'Hare Intl flights

Heathrow to Midway flights

London City to O'Hare Intl flights

Heathrow to Denver 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!

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 Heathrow Airport to Delaware from £423

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 22/5. 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 25 March 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 25 March 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 25 March 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?

100% Free

Book with Flexibility

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 25 March 2025.