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Cheap flights from London to Delaware from £376

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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
7 Dec — 14 Dec1
1 adult
1 adult, Economy, 0 bags

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 7 November 2025.

Round-trip from

£470

One-way from

£376

Popular in

December

Cheapest in

February

Average price

£554
2/2-6/2
  • 2/2-6/2
  • 3 total stops
  • 35h 10m total
  • London to Delaware
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2/3
  • 2/3
  • 3 total stops
  • 34h 25m total
  • London to Delaware
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£18 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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Find flight deals from London to Delaware

Enter your travel dates to find the best prices.

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 7 November 2025.

Tue 2/1212:20LHR - PHL
2 stops26h 19mIcelandair
Tue 9/1210:24PHL - LHR
1 stop15h 31mIcelandair
Deal found 5/11£473
Fri 5/1206:30STN - PHL
1 stop14h 30mMultiple Airlines
Wed 10/1217:30PHL - STN
1 stop9h 20mMultiple Airlines
Deal found 6/11£474
Mon 8/1206:00LHR - PHL
2 stops39h 05mMultiple Airlines
Mon 15/1207:50PHL - LHR
2 stops18h 20mMultiple Airlines
Deal found 6/11£474
Thu 4/1209:20LHR - PHL
1 stop17h 28mJetBlue
Mon 8/1210:24PHL - LHR
1 stop15h 31mJetBlue
Deal found 7/11£475
Fri 14/1114:00LGW - PHL
1 stop16h 24mMultiple Airlines
Mon 17/1119:54PHL - LGW
2 stops29h 06mMultiple Airlines
Deal found 7/11£478
Wed 10/1209:20LHR - PHL
1 stop11h 17mJetBlue
Thu 8/113:30PHL - LHR
1 stop12h 25mJetBlue
Deal found 5/11£481
Thu 13/1114:00LGW - PHL
1 stop22h 30mMultiple Airlines
Sun 23/1106:00PHL - LGW
2 stops23h 55mMultiple Airlines
Deal found 7/11£483
Thu 4/1209:20LHR - PHL
1 stop11h 17mJetBlue
Thu 11/1210:24PHL - LHR
1 stop15h 31mJetBlue
Deal found 6/11£484
Mon 8/1209:20LHR - PHL
1 stop29h 19mJetBlue
Mon 15/1216:32PHL - LHR
1 stop9h 23mJetBlue
Deal found 6/11£485
Mon 8/1213:25LHR - PHL
1 stop30h 25mAir Canada
Mon 15/1207:50PHL - LHR
2 stops18h 20mAir Canada
Deal found 6/11£486
Wed 3/1213:30LHR - PHL
1 stop31h 35mUnited Airlines
Wed 10/1216:35PHL - LHR
2 stops23h 00mUnited Airlines
Deal found 5/11£487
Wed 12/1108:50LGW - PHL
1 stop12h 10mMultiple Airlines
Wed 19/1117:30PHL - LGW
2 stops19h 20mMultiple Airlines
Deal found 5/11£489

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Delaware that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 7 November 2025.
Use the filters below to find and compare flights from London to Delaware that are best for you.

Fly from

London

Fly to

Delaware

Route

Depart

Return

Price

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Mon 8/12

14:00-14:44

2 stops29h 44m

Philadelphia

Sat 13/12

22:00-10:00

1 stop31h 00m

£483

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 2/12

06:50-14:50

2 stops13h 00m

Philadelphia

Tue 9/12

07:50-07:10

2 stops18h 20m

£494

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 20/11

07:30-16:05

1 stop13h 35m

Philadelphia

Mon 24/11

09:20-20:35

2 stops30h 15m

£522

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Thu 11/12

08:30-18:32

2 stops39h 02m

Philadelphia

Sun 11/1

05:01-10:00

1 stop23h 59m

£525

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Mon 8/12

14:00-18:55

1 stop33h 55m

Philadelphia

Mon 15/12

05:30-10:00

1 stop23h 30m

£529

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 4/12

13:25-15:49

2 stops31h 24m

Philadelphia

Mon 8/12

13:15-07:10

2 stops12h 55m

£529

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 5/3

09:00-22:46

2 stops18h 46m

Philadelphia

Mon 9/3

15:30-07:10

1 stop11h 40m

£533

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 2/12

07:50-13:55

1 stop11h 05m

Philadelphia

Tue 9/12

19:50-07:50

Nonstop7h 00m

£534

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Fri 5/12

06:30-16:00

1 stop14h 30m

Philadelphia

Wed 10/12

10:24-07:50

2 stops16h 26m

£535

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Fri 5/12

13:05-21:48

2 stops13h 43m

Philadelphia

Wed 10/12

17:30-08:35

1 stop10h 05m

£542

Flights are sorted by cheapest return flights first.

Deals found on 6/11

Showing 1-10 of 60 results
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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
No data available for this route at this time. Please check back soon.

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.

  • How long is the flight from London to Delaware?

    Air Canada, United Airlines, and American Airlines can get you from London to Delaware in just under 11h 05m. Your travel time can differ by up to 2h 30m. London and Delaware are separated by a distance of 3533 mi. This flight may include one or multiple stops.

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

    For one-way options, check prices for British Airways. According to our data, you can fly for as low as £377. Users have also found prices from £381 and £394 on United Airlines and Virgin Atlantic, 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 City - Philadelphia or London Gatwick - 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

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Alternative routes for London to Delaware

See prices for flight routes from nearby airports that may be better suited for you.
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Edinburgh to John F Kennedy Intl flights
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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?

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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