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Cheap flights from London to Delaware from £372

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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
11 Dec — 18 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 11 November 2025.

Round-trip from

£472

One-way from

£372

Popular in

December

Cheapest in

February

Average price

£545
Icelandair
  • Icelandair
  • 28/11-3/12
  • 2 total stops
  • 24h 04m total
  • London to Delaware
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Iberia
  • Iberia
  • 27/4
  • 1 total stop
  • 25h 35m total
  • London to Delaware
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£19 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 11 November 2025.

Fri 28/1109:20LHR - PHL
1 stop14h 41mIcelandair
Wed 3/1216:32PHL - LHR
1 stop9h 23mIcelandair
Deal found 9/11£472
Fri 5/1214:00LGW - PHL
1 stop15h 40mMultiple Airlines
Sun 14/1206:00PHL - LGW
2 stops23h 00mMultiple Airlines
Deal found 9/11£472
Tue 2/1209:20LHR - PHL
1 stop11h 17mJetBlue
Mon 8/1210:24PHL - LHR
1 stop15h 31mJetBlue
Deal found 9/11£473
Mon 8/1214:00LGW - PHL
1 stop33h 55mMultiple Airlines
Mon 15/1205:30PHL - LGW
1 stop23h 30mMultiple Airlines
Deal found 9/11£474
Fri 5/1206:30STN - PHL
1 stop14h 30mMultiple Airlines
Wed 10/1217:30PHL - STN
1 stop9h 20mMultiple Airlines
Deal found 9/11£475
Mon 8/1206:00LHR - PHL
2 stops39h 05mMultiple Airlines
Mon 15/1207:50PHL - LHR
2 stops18h 20mMultiple Airlines
Deal found 9/11£476
Fri 5/1209:20LHR - PHL
1 stop17h 28mJetBlue
Mon 15/1216:32PHL - LHR
1 stop9h 23mJetBlue
Deal found 10/11£480
Fri 21/1114:00LGW - PHL
2 stops29h 07mMultiple Airlines
Mon 24/1106:15PHL - LGW
1 stop22h 45mMultiple Airlines
Deal found 10/11£482
Tue 2/1206:50LHR - PHL
2 stops13h 00mAir Canada
Mon 8/1207:50PHL - LHR
2 stops18h 20mAir Canada
Deal found 9/11£482
Tue 2/1209:20LHR - PHL
1 stop11h 17mJetBlue
Tue 9/1210:24PHL - LHR
1 stop15h 31mJetBlue
Deal found 9/11£483
Mon 8/1208:05LHR - PHL
2 stops36h 32mIcelandair
Mon 15/1216:32PHL - LHR
1 stop9h 23mIcelandair
Deal found 10/11£484
Tue 2/1209:20LHR - PHL
1 stop29h 19mIcelandair
Tue 9/1210:24PHL - LHR
1 stop15h 31mIcelandair
Deal found 8/11£485

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 11 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

14:00-23:34

1 stop14h 34m

Philadelphia

Mon 15/12

05:30-10:00

1 stop23h 30m

£474

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Fri 5/12

06:30-16:00

1 stop14h 30m

Philadelphia

Wed 10/12

17:30-07:50

1 stop9h 20m

£475

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Fri 21/11

14:00-07:32

1 stop22h 32m

Philadelphia

Mon 24/11

06:00-10:55

2 stops23h 55m

£499

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Fri 21/11

08:30-16:00

1 stop12h 30m

Philadelphia

Mon 24/11

17:30-07:50

1 stop9h 20m

£501

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Fri 5/12

14:00-00:40

1 stop15h 40m

Philadelphia

Sun 14/12

22:00-06:00

2 stops27h 00m

£507

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Fri 21/11

14:00-07:32

1 stop22h 32m

Philadelphia

Sun 23/11

06:00-10:55

2 stops23h 55m

£529

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 2/12

07:50-13:55

1 stop11h 05m

Philadelphia

Tue 9/12

18:35-06:35

Nonstop7h 00m

£535

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 5/12

08:30-21:10

2 stops17h 40m

Philadelphia

Sun 14/12

07:50-20:35

2 stops31h 45m

£537

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 5/3

09:20-22:45

1 stop18h 25m

Philadelphia

Mon 9/3

15:02-06:55

1 stop11h 53m

£538

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Wed 21/1

17:40-18:54

2 stops30h 14m

Philadelphia

Mon 2/2

15:01-17:05

2 stops21h 04m

£542

Flights are sorted by cheapest return flights first.

Deals found on 9/11

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?

    American Airlines, United Airlines, and JetBlue can get you from London to Delaware in just under 11h 05m. Your travel time can differ by up to 7h 20m. 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 Iberia. According to our data, you can fly for as low as £374. Users have also found prices from £375 and £380 on British Airways and United Airlines, 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 Gatwick - Philadelphia or London City - 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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London City to Orlando flights
London City to Los Angeles flights
Stansted to Miami flights
Heathrow to George Bush Intcntl flights
Edinburgh to Newark flights
Edinburgh to John F Kennedy Intl flights
Heathrow to Philadelphia flights
Gatwick to Boston flights
Luton to Miami flights
Gatwick to Las Vegas flights
Gatwick to Dulles Intl flights
Heathrow to Denver flights
Gatwick to San Francisco flights
Gatwick to Dallas/Fort Worth flights
London City to Boston flights

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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