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 (£386), British Airways (£464), and Iberia (£476).

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 17 days in advance to save up to 42% 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 17 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 £514, or £758 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 £555. You can even find prices in February for less than £555, as users have found deals to Delaware from as low as £386. 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 29%.

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.

£386+ Flights from London Heathrow Airport to Delaware

Cheap flight deals from Heathrow to Delaware

Round-trip from	£450
One-way from	£386
Popular in	August
Cheapest in	February
Average price	£559

Finnair
29/8-11/9
1 total stop
18h 20m total
London to Delaware

Search Deals

Aer Lingus
24/9
1 total stop
14h 10m total
London to Delaware

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£44 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 June 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 13 June 2025.

Sat 30/806:50LHR - PHL

2 stops12h 47mMultiple Airlines

Sun 7/910:35PHL - LHR

2 stops14h 55mMultiple Airlines

Deal found 13/6£450

Thu 11/908:25LHR - PHL

1 stop14h 20mJetBlue

Thu 18/910:20PHL - LHR

1 stop15h 10mJetBlue

Deal found 13/6£452

Mon 1/907:10LHR - PHL

1 stop11h 55mBritish Airways

Tue 30/915:59PHL - LHR

1 stop10h 21mBritish Airways

Deal found 11/6£453

Thu 27/1106:50LHR - PHL

2 stops13h 00mAir Canada

Thu 4/1215:30PHL - LHR

1 stop10h 40mAir Canada

Deal found 12/6£464

Mon 1/920:25LHR - PHL

2 stops24h 35mLufthansa

Sun 14/917:35PHL - LHR

1 stop11h 05mLufthansa

Deal found 13/6£468

Mon 23/611:45LHR - PHL

1 stop12h 50mVirgin Atlantic

Mon 30/618:33PHL - LHR

1 stop13h 57mVirgin Atlantic

Deal found 13/6£475

Thu 27/1113:10LHR - PHL

Nonstop8h 10mFinnair

Thu 4/1219:45PHL - LHR

Nonstop7h 05mFinnair

Deal found 12/6£477

Thu 27/1107:25LHR - PHL

1 stop13h 10mAmerican Airlines

Thu 4/1219:45PHL - LHR

Nonstop7h 05mAmerican Airlines

Deal found 12/6£478

Mon 23/610:05LHR - PHL

Nonstop7h 55mIberia

Mon 30/617:31PHL - LHR

1 stop9h 19mIberia

Deal found 11/6£485

Tue 1/706:30LHR - PHL

2 stops19h 21mDelta

Tue 8/713:25PHL - LHR

1 stop12h 20mDelta

Deal found 11/6£487

Sun 22/607:25LHR - PHL

2 stops21h 04mUnited Airlines

Mon 30/612:19PHL - LHR

2 stops13h 56mUnited Airlines

Deal found 11/6£519

Mon 23/613:05LHR - PHL

1 stop12h 54mKLM

Mon 30/617:30PHL - LHR

2 stops12h 15mKLM

Deal found 12/6£536

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 13 June 2025.

Fri 29/807:55LHR - PHL

1 stop11h 10mFinnair

Thu 11/918:30PHL - LHR

Nonstop7h 10mFinnair

Deal found 10/6£450

Sun 24/820:15LHR - PHL

1 stop25h 00mBritish Airways

Tue 23/917:14PHL - LHR

1 stop9h 36mBritish Airways

Deal found 10/6£453

Wed 3/908:00LHR - PHL

1 stop12h 50mAmerican Airlines

Mon 15/919:50PHL - LHR

Nonstop7h 15mAmerican Airlines

Deal found 10/6£457

Tue 2/908:25LHR - PHL

1 stop14h 25mJetBlue

Sat 20/915:10PHL - LHR

1 stop10h 20mJetBlue

Deal found 10/6£458

Mon 1/908:30LHR - PHL

1 stop12h 30mMultiple Airlines

Sun 14/915:25PHL - LHR

1 stop10h 05mMultiple Airlines

Deal found 12/6£462

Wed 3/908:40LHR - PHL

2 stops17h 51mDelta

Wed 17/913:00PHL - LHR

2 stops13h 15mDelta

Deal found 10/6£464

Mon 23/609:40LHR - PHL

1 stop12h 09mVirgin Atlantic

Mon 30/618:33PHL - LHR

1 stop13h 57mVirgin Atlantic

Deal found 10/6£470

Mon 23/612:30LHR - PHL

Nonstop7h 55mIberia

Mon 30/619:50PHL - LHR

Nonstop7h 15mIberia

Deal found 11/6£473

Mon 1/908:30LHR - PHL

1 stop12h 30mLufthansa

Sun 14/919:58PHL - LHR

2 stops19h 42mLufthansa

Deal found 10/6£500

Sat 5/709:30LHR - PHL

1 stop10h 03mAir Canada

Tue 5/815:20PHL - LHR

1 stop10h 10mAir Canada

Deal found 12/6£510

Mon 23/613:05LHR - PHL

1 stop12h 54mKLM

Mon 30/617:30PHL - LHR

2 stops12h 15mKLM

Deal found 12/6£536

Fri 7/1113:30LHR - PHL

2 stops14h 26mUnited Airlines

Mon 17/1112:40PHL - LHR

1 stop12h 15mUnited Airlines

Deal found 10/6£542

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 13 June 2025.

Mon 1/912:30LHR - PHL

Nonstop8h 05mBritish Airways

Mon 8/919:50PHL - LHR

Nonstop7h 15mBritish Airways

Deal found 11/6£457

Mon 23/612:30LHR - PHL

Nonstop7h 55mIberia

Mon 30/619:50PHL - LHR

Nonstop7h 15mIberia

Deal found 11/6£473

Thu 27/1113:10LHR - PHL

Nonstop8h 10mFinnair

Thu 4/1219:45PHL - LHR

Nonstop7h 05mFinnair

Deal found 12/6£477

Mon 23/612:30LHR - PHL

Nonstop7h 55mMultiple Airlines

Mon 30/622:15PHL - LHR

Nonstop7h 05mMultiple Airlines

Deal found 13/6£483

Wed 2/712:30LHR - PHL

Nonstop7h 55mAmerican Airlines

Tue 8/722:25PHL - LHR

Nonstop7h 05mAmerican Airlines

Deal found 11/6£486

Last-minute flights from Heathrow to Delaware
Discover last-minute flight deals from Heathrow to Delaware. Data last updated 13 June 2025 and is based on user searches.

Wed 18/607:40LHR - PHL

1 stop13h 20mBritish Airways

Wed 2/722:15PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 11/6£464

Wed 18/609:50LHR - PHL

1 stop14h 10mAer Lingus

Sun 22/620:30PHL - LHR

1 stop11h 10mAer Lingus

Deal found 12/6£712

Wed 18/606:50LHR - PHL

2 stops12h 43mAir Canada

Wed 2/715:05PHL - LHR

2 stops14h 10mAir Canada

Deal found 11/6£771

Wed 18/609:40LHR - PHL

1 stop12h 09mVirgin Atlantic

Sat 5/717:17PHL - LHR

1 stop12h 53mVirgin Atlantic

Deal found 11/6£1,107

Sun 22/607:25LHR - PHL

2 stops21h 04mUnited Airlines

Mon 30/612:19PHL - LHR

2 stops13h 56mUnited Airlines

Deal found 11/6£519

Mon 23/610:05LHR - PHL

Nonstop7h 55mIberia

Mon 30/617:31PHL - LHR

1 stop9h 19mIberia

Deal found 11/6£485

Mon 23/606:30LHR - PHL

2 stops15h 48mDelta

Mon 7/710:39PHL - LHR

1 stop15h 06mDelta

Deal found 12/6£491

Mon 23/612:30LHR - PHL

Nonstop7h 55mFinnair

Mon 7/722:25PHL - LHR

Nonstop7h 05mFinnair

Deal found 12/6£495

Mon 23/609:15LHR - PHL

1 stop12h 59mAmerican Airlines

Mon 30/613:48PHL - LHR

1 stop13h 02mAmerican Airlines

Deal found 12/6£497

Mon 23/610:05LHR - PHL

Nonstop7h 55mMultiple Airlines

Mon 30/608:20PHL - LHR

1 stop18h 20mMultiple Airlines

Deal found 11/6£497

Mon 23/611:45LHR - PHL

1 stop12h 50mKLM

Mon 30/618:33PHL - LHR

1 stop13h 57mKLM

Deal found 12/6£517

Mon 23/611:20LHR - PHL

3 stops27h 18mTAP AIR PORTUGAL

Mon 7/717:40PHL - LHR

2 stops19h 05mTAP AIR PORTUGAL

Deal found 12/6£978

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 13 June 2025.

Wed 24/909:50LHR - PHL

1 stop14h 10mAer Lingus

Deal found 11/6£386

Wed 13/813:25LHR - PHL

2 stops26h 18mMultiple Airlines

Deal found 10/6£411

Wed 18/610:05LHR - PHL

Nonstop7h 55mBritish Airways

Deal found 11/6£464

Wed 18/610:05LHR - PHL

Nonstop7h 55mIberia

Deal found 10/6£476

Thu 19/609:30LHR - PHL

1 stop11h 30mLufthansa

Deal found 12/6£494

Tue 24/610:05LHR - PHL

Nonstop7h 55mFinnair

Deal found 12/6£506

Mon 8/908:25LHR - PHL

1 stop14h 20mJetBlue

Deal found 12/6£509

Wed 18/606:00LHR - PHL

2 stops32h 38mTAP AIR PORTUGAL

Deal found 12/6£528

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

Sat 30/8

06:50-14:37

2 stops12h 47m

Philadelphia

Sun 7/9

10:35-06:30

2 stops14h 55m

£450

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 11/9

08:25-17:45

1 stop14h 20m

Philadelphia

Thu 18/9

10:20-06:30

1 stop15h 10m

£452

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 1/9

07:10-14:05

1 stop11h 55m

Philadelphia

Tue 30/9

15:59-07:20

1 stop10h 21m

£453

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 27/11

06:50-14:50

2 stops13h 00m

Philadelphia

Thu 4/12

15:30-07:10

1 stop10h 40m

£464

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 1/9

20:25-16:00

2 stops24h 35m

Philadelphia

Sun 14/9

17:35-09:40

1 stop11h 05m

£468

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 23/6

12:30-15:25

Nonstop7h 55m

Philadelphia

Mon 30/6

19:50-08:05

Nonstop7h 15m

£473

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 23/6

11:45-23:10

1 stop16h 25m

Philadelphia

Mon 30/6

12:09-13:30

1 stop20h 21m

£475

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 27/11

13:10-16:20

Nonstop8h 10m

Philadelphia

Thu 4/12

19:45-07:50

Nonstop7h 05m

£477

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 27/11

07:25-15:35

1 stop13h 10m

Philadelphia

Thu 4/12

19:45-07:50

Nonstop7h 05m

£478

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 1/7

06:30-20:51

2 stops19h 21m

Philadelphia

Tue 8/7

13:25-06:45

1 stop12h 20m

£487

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 25 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, KLM 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

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very Good

7,946 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,358 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Austrian Airlines

7.6

Good

802 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Finnair

7.6

Good

1,290 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,790 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 (£386), British Airways (£464), and Iberia (£476).
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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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 £386

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 24/9. 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 13 June 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 13 June 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 13 June 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, KLM 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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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 13 June 2025.