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Cheap flights from London to Delaware from £404

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
18 May — 25 May1
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 18 April 2026.

Thu 21/513:45
LHR
-
PHL
Nonstop7h 50m
British Airways
Sun 24/518:40
PHL
-
LHR
Nonstop7h 10m
British Airways
Deal found 13/4£563
Wed 20/513:45
LHR
-
PHL
Nonstop7h 50m
British Airways
Fri 29/518:40
PHL
-
LHR
Nonstop7h 10m
British Airways
Deal found 13/4£565
Wed 20/513:45
LHR
-
PHL
Nonstop7h 50m
British Airways
Tue 26/518:40
PHL
-
LHR
Nonstop7h 10m
British Airways
Deal found 13/4£565
Wed 1/708:40
LHR
-
PHL
1 stop16h 20m
JetBlue
Wed 15/708:28
PHL
-
LHR
1 stop17h 02m
JetBlue
Deal found 13/4£569
Thu 18/612:20
LGW
-
PHL
1 stop24h 18m
JetBlue
Mon 29/620:55
PHL
-
LGW
1 stop31h 40m
JetBlue
Deal found 14/4£570
Sat 23/509:30
LHR
-
PHL
1 stop10h 18m
Air Canada
Sat 30/515:25
PHL
-
LHR
1 stop13h 35m
Air Canada
Deal found 13/4£572
Fri 22/508:30
LHR
-
PHL
1 stop12h 08m
Air Canada
Sat 30/515:25
PHL
-
LHR
1 stop13h 35m
Air Canada
Deal found 13/4£575
Wed 23/914:00
LGW
-
PHL
1 stop26h 55m
Multiple Airlines
Wed 7/1015:10
PHL
-
LGW
1 stop13h 50m
Multiple Airlines
Deal found 15/4£575
Sun 31/514:00
LGW
-
PHL
1 stop23h 54m
Multiple Airlines
Sun 7/621:16
PHL
-
LGW
1 stop31h 44m
Multiple Airlines
Deal found 16/4£577
Mon 11/507:30
LHR
-
PHL
1 stop13h 35m
United Airlines
Mon 18/506:00
PHL
-
LHR
2 stops19h 30m
United Airlines
Deal found 13/4£578
Mon 21/914:00
LGW
-
PHL
1 stop26h 55m
Multiple Airlines
Mon 12/1008:00
PHL
-
LGW
1 stop21h 00m
Multiple Airlines
Deal found 14/4£578
Mon 11/508:40
LHR
-
PHL
1 stop13h 58m
JetBlue
Tue 26/509:21
PHL
-
LHR
1 stop16h 09m
JetBlue
Deal found 17/4£579

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 18 April 2026.

Round-trip from

£563

One-way from

£404

Popular in

December

Cheapest in

September

Average price

£623
British Airways
  • British Airways
  • 21/5-24/5
  • Nonstop
  • 15h 00m total
  • London to Delaware
Search Deals
JetBlue
  • JetBlue
  • 6/5
  • 1 total stop
  • 13h 58m total
  • London to Delaware
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (£6 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 18 April 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

Mon 21/9

09:30-16:05

1 stop11h 35m

Philadelphia

Mon 28/9

07:00-21:00

2 stops33h 00m

£582

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Mon 18/5

18:05-16:05

2 stops27h 00m

Philadelphia

Mon 25/5

17:40-22:50

2 stops24h 10m

£610

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Mon 21/9

12:05-09:50

2 stops26h 45m

Philadelphia

Mon 28/9

10:45-09:45

2 stops18h 00m

£621

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Mon 21/9

09:15-16:05

1 stop11h 50m

Philadelphia

Mon 28/9

17:40-17:55

1 stop19h 15m

£646

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Mon 1/6

13:00-16:05

3 stops32h 05m

Philadelphia

Mon 8/6

15:25-18:05

2 stops21h 40m

£653

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 16/5

07:25-21:44

2 stops19h 19m

Philadelphia

Thu 21/5

06:00-06:30

2 stops19h 30m

£653

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Tue 12/5

09:15-16:05

1 stop11h 50m

Philadelphia

Tue 19/5

17:40-17:55

1 stop19h 15m

£668

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 17/5

17:50-17:32

2 stops28h 42m

Philadelphia

Sun 24/5

19:45-21:35

2 stops20h 50m

£669

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 16/5

06:50-14:48

2 stops12h 58m

Philadelphia

Thu 21/5

06:00-09:35

1 stop22h 35m

£675

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Mon 18/5

18:30-16:05

1 stop26h 35m

Philadelphia

Mon 25/5

17:40-17:55

1 stop19h 15m

£689

Flights are sorted by cheapest return flights first.

Deals found on 15/4

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, TAP AIR PORTUGAL, and Lufthansa can get you from London to Delaware in just under 11h 35m. Your travel time can differ by up to 15h 10m. 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 £43. Users have also found prices from £61 and £78 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
Gatwick to John F Kennedy Intl flights
Heathrow to LaGuardia flights
Stansted to John F Kennedy Intl flights
Gatwick to Newark flights
London City to John F Kennedy Intl flights
Heathrow to Los Angeles flights
Gatwick to LaGuardia flights
Heathrow to Orlando flights
Luton to John F Kennedy Intl flights
Heathrow to Miami flights
Stansted to Newark flights
Manchester to John F Kennedy Intl flights
Heathrow to Boston flights
Luton to Newark flights
Heathrow to San Francisco flights
Manchester to Orlando flights
Heathrow to O'Hare Intl flights
Heathrow to Dulles Intl flights
Heathrow to Dallas/Fort Worth flights
London City to Newark flights
Gatwick to Orlando flights
Heathrow to Seattle flights
Heathrow to Las Vegas flights
Heathrow to Hobby flights
Stansted to Los Angeles flights
Stansted to Orlando flights
Gatwick to Miami flights
London City to Los Angeles flights
Heathrow to Atlanta flights
Gatwick to Los Angeles flights
Gatwick to Boston flights
Stansted to Miami flights
Manchester to Newark flights
Heathrow to Baltimore flights
London City to Orlando flights
London City to Miami flights
Manchester to LaGuardia flights
Heathrow to George Bush Intcntl flights
Gatwick to San Francisco flights
Luton to Miami flights
Heathrow to Denver flights
London City to Boston flights
Heathrow to Ontario flights
Heathrow to Tampa flights
Stansted to San Francisco flights
London City to San Francisco flights
Stansted to Boston flights
Heathrow to Nashville 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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