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Cheap flights from London to Delaware from £245

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 22/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
26 Apr — 3 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 27 March 2026.

Wed 29/408:40
LHR
-
PHL
1 stop13h 58m
JetBlue
Tue 12/506:00
PHL
-
LHR
1 stop19h 30m
JetBlue
Deal found 22/3£529
Mon 13/408:40
LHR
-
PHL
1 stop13h 55m
JetBlue
Wed 22/408:25
PHL
-
LHR
1 stop17h 05m
JetBlue
Deal found 27/3£535
Fri 17/412:15
LHR
-
PHL
1 stop11h 39m
United Airlines
Sun 19/419:45
PHL
-
LHR
1 stop9h 55m
United Airlines
Deal found 24/3£536
Sun 7/612:20
LGW
-
PHL
1 stop13h 59m
JetBlue
Wed 10/609:22
PHL
-
LGW
1 stop19h 13m
JetBlue
Deal found 26/3£536
Thu 23/408:40
LHR
-
PHL
1 stop18h 19m
JetBlue
Mon 4/508:25
PHL
-
LHR
1 stop17h 05m
JetBlue
Deal found 26/3£537
Sat 11/408:40
LHR
-
PHL
1 stop13h 55m
JetBlue
Thu 30/408:25
PHL
-
LHR
1 stop17h 05m
JetBlue
Deal found 26/3£538
Fri 17/414:00
LGW
-
PHL
1 stop22h 41m
Multiple Airlines
Sun 26/411:59
PHL
-
LGW
2 stops38h 01m
Multiple Airlines
Deal found 26/3£538
Wed 2/908:40
LHR
-
PHL
1 stop16h 09m
JetBlue
Sat 12/918:10
PHL
-
LHR
1 stop31h 20m
JetBlue
Deal found 23/3£539
Tue 7/408:40
LHR
-
PHL
1 stop13h 55m
JetBlue
Sun 19/408:25
PHL
-
LHR
1 stop17h 05m
JetBlue
Deal found 23/3£539
Fri 17/414:00
LGW
-
PHL
1 stop22h 41m
Multiple Airlines
Sun 3/522:38
PHL
-
LGW
1 stop30h 22m
Multiple Airlines
Deal found 26/3£539
Tue 6/1008:40
LHR
-
PHL
1 stop18h 10m
JetBlue
Fri 9/1010:20
PHL
-
LHR
1 stop15h 10m
JetBlue
Deal found 25/3£541
Fri 17/414:00
LGW
-
PHL
1 stop22h 41m
Multiple Airlines
Mon 27/409:00
PHL
-
LGW
2 stops32h 50m
Multiple Airlines
Deal found 26/3£541

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 27 March 2026.

Round-trip from

£529

One-way from

£245

Popular in

December

Cheapest in

September

Average price

£616
JetBlue
  • JetBlue
  • 29/4-12/5
  • 2 total stops
  • 33h 28m total
  • London to Delaware
Search Deals
22/4
  • 22/4
  • 1 total stop
  • 30h 27m 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 27 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

Wed 8/4

10:50-00:59

2 stops19h 09m

Philadelphia

Sun 19/4

09:15-21:00

2 stops30h 45m

£630

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 6/6

08:30-09:48

1 stop30h 18m

Philadelphia

Sun 7/6

17:40-18:40

1 stop20h 00m

£641

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 20/4

09:15-12:10

Nonstop7h 55m

Philadelphia

Mon 27/4

19:35-07:50

Nonstop7h 15m

£649

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Mon 8/6

12:05-18:50

2 stops35h 45m

Philadelphia

Mon 15/6

09:12-20:25

2 stops30h 13m

£650

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Fri 5/6

21:15-08:30

2 stops40h 15m

Philadelphia

Mon 15/6

09:12-20:25

2 stops30h 13m

£650

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Wed 29/4

09:15-16:05

1 stop11h 50m

Philadelphia

Tue 12/5

17:40-17:55

1 stop19h 15m

£653

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Sun 12/4

21:15-07:35

2 stops39h 20m

Philadelphia

Mon 20/4

06:00-20:25

2 stops33h 25m

£653

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Thu 11/6

14:00-10:38

1 stop25h 38m

Philadelphia

Mon 15/6

07:30-10:00

1 stop21h 30m

£656

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Wed 6/5

10:10-16:05

3 stops34h 55m

Philadelphia

Sun 10/5

17:40-23:35

3 stops24h 55m

£658

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 11/5

12:30-15:30

Nonstop8h 00m

Philadelphia

Mon 18/5

19:35-07:50

Nonstop7h 15m

£659

Flights are sorted by cheapest return flights first.

Deals found on 26/3

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, Finnair, and TAP AIR PORTUGAL can get you from London to Delaware in just under 7h 55m. Your travel time can differ by up to 27h 50m. London and Delaware are separated by a distance of 3533 mi. This flight may include one or multiple stops.

  • 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

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