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Cheap flights from London to Delaware from £265

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 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
15 Apr — 22 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap 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 16 March 2026.

Mon 29/616:40
LHR
-
PHL
1 stop12h 04m
United Airlines
Wed 15/715:10
PHL
-
LHR
1 stop14h 30m
United Airlines
Deal found 12/3£469
Mon 27/406:30
STN
-
PHL
1 stop17h 25m
Multiple Airlines
Mon 4/520:25
PHL
-
STN
1 stop11h 25m
Multiple Airlines
Deal found 13/3£470
Tue 21/408:40
LHR
-
PHL
1 stop18h 19m
JetBlue
Tue 28/408:25
PHL
-
LHR
1 stop17h 05m
JetBlue
Deal found 12/3£479
Mon 27/412:40
LGW
-
PHL
1 stop11h 15m
Multiple Airlines
Mon 4/520:25
PHL
-
LGW
1 stop18h 05m
Multiple Airlines
Deal found 13/3£481
Wed 15/413:45
LHR
-
PHL
Nonstop7h 50m
British Airways
Sun 19/418:40
PHL
-
LHR
Nonstop7h 10m
British Airways
Deal found 13/3£485
Wed 2/913:45
LHR
-
PHL
Nonstop7h 55m
British Airways
Wed 16/918:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 13/3£486
Thu 3/913:45
LHR
-
PHL
Nonstop7h 55m
British Airways
Thu 17/918:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 13/3£487
Thu 3/913:45
LHR
-
PHL
Nonstop7h 55m
British Airways
Sat 19/918:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 13/3£488
Thu 2/712:15
LHR
-
PHL
1 stop11h 39m
United Airlines
Mon 13/715:10
PHL
-
LHR
1 stop14h 30m
United Airlines
Deal found 12/3£492
Sat 27/609:30
LHR
-
PHL
1 stop10h 19m
Air Canada
Wed 15/715:25
PHL
-
LHR
1 stop10h 05m
Air Canada
Deal found 12/3£493
Sat 27/609:30
LHR
-
PHL
1 stop10h 19m
Air Canada
Mon 13/716:20
PHL
-
LHR
1 stop11h 15m
Air Canada
Deal found 12/3£496
Wed 30/908:40
LHR
-
PHL
1 stop13h 35m
JetBlue
Tue 6/1010:20
PHL
-
LHR
1 stop15h 10m
JetBlue
Deal found 11/3£497

Find flight deals from London to Delaware

Keep the following information in mind while searching for London to Delaware flight deals. Data was last updated 16 March 2026.

Round-trip from

£469

One-way from

£265

Popular in

December

Cheapest in

September

Average price

£621
United Airlines
  • United Airlines
  • 29/6-15/7
  • 2 total stops
  • 26h 34m total
  • London to Delaware
Search Deals
1/5
  • 1/5
  • 1 total stop
  • 24h 29m total
  • London to Delaware
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£16 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 March 2026
Search Deals

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 16 March 2026.
Use the filters below to find and compare flights from London to Delaware that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 16/5

17:40-09:48

1 stop21h 08m

Philadelphia

Sun 17/5

17:40-16:40

1 stop18h 00m

£536

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Wed 6/5

21:30-23:37

3 stops31h 07m

Philadelphia

Sun 10/5

10:54-23:20

3 stops31h 26m

£553

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 30/4

08:40-17:38

1 stop13h 58m

Philadelphia

Thu 7/5

08:25-06:30

1 stop17h 05m

£561
Fastest return journey

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 21/4

08:50-15:05

1 stop11h 15m

Philadelphia

Tue 28/4

22:05-10:20

Nonstop7h 15m

£565

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Mon 13/4

08:30-18:55

1 stop15h 25m

Philadelphia

Mon 20/4

20:25-17:05

1 stop15h 40m

£576

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 15/4

14:10-15:44

2 stops30h 34m

Philadelphia

Sun 19/4

19:45-06:55

1 stop30h 10m

£579

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 24/4

07:40-15:05

1 stop12h 25m

Philadelphia

Mon 27/4

18:30-10:10

1 stop10h 40m

£584

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 20/4

08:15-15:05

1 stop11h 50m

Philadelphia

Mon 27/4

18:40-06:50

Nonstop7h 10m

£586

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Mon 20/4

08:15-18:55

1 stop15h 40m

Philadelphia

Mon 27/4

20:25-12:45

1 stop11h 20m

£587

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Fri 24/4

06:20-18:55

1 stop17h 35m

Philadelphia

Mon 27/4

20:25-12:45

1 stop11h 20m

£596

Flights are sorted by cheapest return flights first.

Deals found on 13/3

Showing 1-10 of 60 resultsSorted by cheapest first
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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?

    United Airlines, JetBlue, and British Airways can get you from London to Delaware in just under 11h 15m. Your travel time can differ by up to 9h 53m. 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 Wizz Air. According to our data, you can fly for as low as £44. Users have also found prices from £63 and £79 on Ryanair and Wizz Air, 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

Browse thousands of different options on Cheapflights for your next trip

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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.
Heathrow to John F Kennedy Intl flights
Heathrow to Newark flights
Heathrow to LaGuardia flights
Gatwick to John F Kennedy Intl flights
Stansted to John F Kennedy Intl flights
London City to John F Kennedy Intl flights
Heathrow to Los Angeles flights
Heathrow to Orlando flights
Gatwick to Newark flights
Gatwick to LaGuardia flights
Heathrow to Miami flights
Heathrow to Boston flights
Luton to John F Kennedy Intl flights
Heathrow to Las Vegas flights
Heathrow to San Francisco flights
Manchester to John F Kennedy Intl flights
Manchester to Orlando flights
London City to Newark flights
Heathrow to O'Hare Intl flights
Stansted to Newark flights
Gatwick to Orlando flights
Luton to Newark flights
Heathrow to Dulles Intl flights
Heathrow to Seattle flights
Heathrow to Dallas/Fort Worth flights
Gatwick to Los Angeles flights
Gatwick to Boston flights
Heathrow to Hobby flights
London City to Los Angeles flights
Stansted to Los Angeles flights
Edinburgh to John F Kennedy Intl flights
Heathrow to Atlanta flights
Edinburgh to Newark flights
Gatwick to Miami flights
Stansted to Orlando flights
Heathrow to Tampa flights
Manchester to Newark flights
Stansted to Miami flights
Heathrow to Baltimore flights
Heathrow to George Bush Intcntl flights
Heathrow to Nashville flights
London City to Boston flights
Heathrow to Ontario flights
London City to Miami flights
Manchester to LaGuardia flights
Stansted to Boston flights
Heathrow to Denver flights
London City to Orlando flights
Luton to Los Angeles flights
Heathrow to Midway 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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