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Cheap flights from London to Delaware from £451

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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
10 Jun — 17 Jun1
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 11 May 2026.

Sun 20/908:40
LHR
-
PHL
1 stop30h 10m
JetBlue
Sun 4/1019:00
PHL
-
LHR
1 stop30h 30m
JetBlue
Deal found 11/5£598
Sun 14/612:20
LGW
-
PHL
1 stop24h 18m
JetBlue
Tue 30/608:28
PHL
-
LGW
1 stop20h 07m
JetBlue
Deal found 6/5£599
Wed 3/619:55
LGW
-
PHL
2 stops25h 10m
Multiple Airlines
Thu 11/617:40
PHL
-
LGW
3 stops34h 00m
Multiple Airlines
Deal found 7/5£600
Mon 1/608:40
LHR
-
PHL
1 stop15h 12m
JetBlue
Tue 9/609:26
PHL
-
LHR
1 stop16h 04m
JetBlue
Deal found 8/5£601
Sat 6/614:00
LGW
-
PHL
1 stop15h 04m
Multiple Airlines
Sun 19/708:30
PHL
-
LGW
2 stops20h 30m
Multiple Airlines
Deal found 8/5£601
Mon 1/608:40
LHR
-
PHL
1 stop15h 12m
JetBlue
Thu 11/608:28
PHL
-
LHR
1 stop17h 02m
JetBlue
Deal found 7/5£602
Sat 6/614:00
LGW
-
PHL
1 stop15h 04m
Multiple Airlines
Sat 18/707:20
PHL
-
LGW
2 stops21h 40m
Multiple Airlines
Deal found 8/5£602
Thu 10/908:40
LHR
-
PHL
1 stop14h 24m
JetBlue
Thu 24/915:25
PHL
-
LHR
1 stop10h 05m
JetBlue
Deal found 11/5£602
Mon 5/1014:00
LGW
-
PHL
1 stop15h 20m
Multiple Airlines
Mon 19/1019:47
PHL
-
LGW
2 stops33h 13m
Multiple Airlines
Deal found 10/5£602
Fri 25/908:40
LHR
-
PHL
1 stop18h 52m
JetBlue
Fri 9/1019:00
PHL
-
LHR
1 stop30h 30m
JetBlue
Deal found 11/5£603
Tue 2/612:20
LGW
-
PHL
1 stop25h 11m
JetBlue
Thu 11/608:28
PHL
-
LGW
1 stop20h 07m
JetBlue
Deal found 7/5£603
Wed 17/608:40
LHR
-
PHL
1 stop27h 58m
JetBlue
Fri 11/919:00
PHL
-
LHR
1 stop30h 30m
JetBlue
Deal found 10/5£604

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 11 May 2026.

Round-trip from

£597

One-way from

£451

Popular in

December

Cheapest in

September

Average price

£590
4/6-10/6
  • 4/6-10/6
  • 4 total stops
  • 50h 35m total
  • London to Delaware
Search Deals
3/10
  • 3/10
  • 3 total stops
  • 36h 35m total
  • London to Delaware
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 11 May 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

LTN - PHL

LTNPHL

London Luton

Thu 4/6

18:20-16:05

2 stops26h 45m

Philadelphia

Wed 10/6

17:40-22:25

2 stops23h 45m

£600

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 1/9

09:30-16:05

1 stop11h 35m

Philadelphia

Tue 8/9

19:55-10:40

1 stop9h 45m

£623

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Mon 22/6

13:10-16:05

3 stops31h 55m

Philadelphia

Mon 29/6

16:20-16:50

2 stops19h 30m

£636

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Thu 4/6

22:05-21:33

3 stops28h 28m

Philadelphia

Wed 10/6

10:05-17:10

3 stops26h 05m

£638
Fastest return journey

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 15/9

13:45-16:40

Nonstop7h 55m

Philadelphia

Wed 30/9

18:45-06:50

Nonstop7h 05m

£648

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 3/6

06:55-16:05

2 stops14h 10m

Philadelphia

Wed 10/6

15:10-09:20

2 stops13h 10m

£657

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Tue 15/9

19:15-16:05

2 stops25h 50m

Philadelphia

Mon 21/9

17:40-12:35

2 stops13h 55m

£664

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 4/6

07:25-18:55

2 stops16h 30m

Philadelphia

Mon 8/6

11:38-07:15

2 stops14h 37m

£682

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 25/6

06:50-18:54

2 stops17h 04m

Philadelphia

Mon 6/7

10:32-08:20

2 stops16h 48m

£687

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 24/9

13:45-16:40

Nonstop7h 55m

Philadelphia

Mon 28/9

18:45-06:50

Nonstop7h 05m

£693

Flights are sorted by cheapest return flights first.

Deals found on 7/5

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 SWISS can get you from London to Delaware in just under 7h 55m. Your travel time can differ by up to 17h 55m. 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 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
Gatwick to LaGuardia flights
Heathrow to Orlando flights
Heathrow to Los Angeles flights
Luton to John F Kennedy Intl flights
Heathrow to Boston flights
Heathrow to San Francisco flights
London City to Newark flights
Luton to Newark flights
Stansted to Newark flights
Heathrow to Miami flights
Heathrow to O'Hare Intl flights
Heathrow to Dulles Intl flights
Manchester to John F Kennedy Intl flights
Manchester to Orlando flights
Gatwick to Boston flights
Heathrow to Dallas/Fort Worth flights
Heathrow to Baltimore flights
Heathrow to Las Vegas flights
Heathrow to Seattle flights
Gatwick to Orlando flights
Heathrow to Hobby flights
Gatwick to Los Angeles flights
Stansted to Los Angeles flights
London City to Los Angeles flights
Stansted to Orlando flights
Gatwick to Miami flights
London City to Boston flights
Heathrow to George Bush Intcntl flights
Manchester to Newark flights
Stansted to Boston flights
Heathrow to Atlanta flights
Gatwick to San Francisco flights
Stansted to Miami flights
London City to Miami flights
London City to San Francisco flights
Stansted to LaGuardia flights
Heathrow to Tampa flights
Edinburgh to John F Kennedy Intl flights
Gatwick to O'Hare Intl flights
Gatwick to Dulles Intl flights
Heathrow to Reagan-National flights
Heathrow to Midway flights
Stansted to Dulles Intl 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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