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Cheap flights from London to Delaware from £342

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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
24 Jun — 1 Jul1
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 25 May 2026.

Mon 6/708:15
STN
-
PHL
2 stops18h 19m
Multiple Airlines
Mon 13/716:20
PHL
-
STN
2 stops19h 30m
Multiple Airlines
Deal found 22/5£601
Mon 22/608:15
LTN
-
PHL
1 stop15h 40m
Multiple Airlines
Mon 29/620:25
PHL
-
LTN
1 stop11h 20m
Multiple Airlines
Deal found 25/5£601
Tue 14/708:40
LHR
-
PHL
1 stop16h 20m
JetBlue
Sun 26/709:12
PHL
-
LHR
1 stop16h 18m
JetBlue
Deal found 21/5£603
Wed 8/719:15
LCY
-
PHL
2 stops25h 50m
SWISS
Wed 15/717:40
PHL
-
LCY
2 stops13h 55m
SWISS
Deal found 21/5£603
Sat 29/808:40
LHR
-
PHL
1 stop16h 20m
JetBlue
Tue 8/908:28
PHL
-
LHR
1 stop17h 02m
JetBlue
Deal found 25/5£603
Mon 5/1009:30
LHR
-
PHL
2 stops18h 16m
United Airlines
Mon 19/1019:40
PHL
-
LHR
1 stop10h 00m
United Airlines
Deal found 23/5£604
Sat 6/614:00
LGW
-
PHL
1 stop15h 04m
Multiple Airlines
Wed 5/813:28
PHL
-
LGW
1 stop15h 32m
Multiple Airlines
Deal found 23/5£604
Mon 22/618:05
LHR
-
PHL
1 stop20h 34m
Finnair
Tue 7/708:27
PHL
-
LHR
1 stop18h 33m
Finnair
Deal found 22/5£605
Wed 10/614:00
LGW
-
PHL
1 stop14h 43m
Multiple Airlines
Fri 7/812:46
PHL
-
LGW
1 stop16h 14m
Multiple Airlines
Deal found 23/5£605
Wed 2/914:10
LHR
-
PHL
2 stops24h 59m
Air Canada
Tue 8/910:30
PHL
-
LHR
2 stops15h 00m
Air Canada
Deal found 25/5£606
Wed 7/1015:00
LHR
-
PHL
1 stop14h 09m
American Airlines
Wed 21/1013:53
PHL
-
LHR
1 stop11h 22m
American Airlines
Deal found 24/5£606
Mon 8/614:00
LGW
-
PHL
1 stop23h 51m
Multiple Airlines
Wed 5/813:28
PHL
-
LGW
1 stop15h 32m
Multiple Airlines
Deal found 23/5£606

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 25 May 2026.

Round-trip from

£601

One-way from

£342

Popular in

December

Cheapest in

September

Average price

£603
6/7-13/7
  • 6/7-13/7
  • 4 total stops
  • 37h 49m total
  • London to Delaware
Search Deals
12/10
  • 12/10
  • 3 total stops
  • 39h 40m total
  • London to Delaware
Search Deals
High demand for flights, 1% 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 25 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

LHR - PHL

LHRPHL

London Heathrow

Sat 21/11

09:20-16:27

1 stop12h 07m

Philadelphia

Mon 7/12

16:32-06:55

1 stop9h 23m

£635

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Mon 22/6

11:35-16:05

3 stops33h 30m

Philadelphia

Tue 7/7

15:25-11:05

2 stops14h 40m

£644

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 15/9

11:20-09:50

2 stops27h 30m

Philadelphia

Wed 30/9

15:25-17:45

3 stops21h 20m

£658

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 8/7

06:00-17:52

2 stops16h 52m

Philadelphia

Mon 20/7

17:40-16:25

2 stops17h 45m

£672

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Mon 13/7

18:35-16:05

2 stops26h 30m

Philadelphia

Thu 23/7

11:38-08:25

2 stops15h 47m

£674

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 29/6

07:45-18:54

2 stops16h 09m

Philadelphia

Wed 8/7

11:38-06:45

1 stop14h 07m

£680

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Mon 14/9

08:15-18:55

1 stop15h 40m

Philadelphia

Sun 20/9

20:25-11:25

1 stop10h 00m

£681

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 25/8

07:30-16:05

1 stop13h 35m

Philadelphia

Fri 4/9

13:35-09:00

1 stop14h 25m

£686

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Mon 14/9

19:15-16:05

2 stops25h 50m

Philadelphia

Sun 20/9

17:40-17:25

2 stops18h 45m

£694

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 6/9

11:20-07:38

3 stops25h 18m

Philadelphia

Tue 22/9

10:45-12:45

2 stops21h 00m

£695

Flights are sorted by cheapest return flights first.

Deals found on 24/5

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?

    JetBlue, SWISS, and United Airlines can get you from London to Delaware in just under 12h 07m. Your travel time can differ by up to 4h 45m. 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 £62 and £116 on Ryanair and Royal Jordanian, 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.
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 Miami flights
Heathrow to Boston flights
Stansted to Newark flights
Heathrow to San Francisco flights
Luton to Newark flights
Heathrow to Dulles Intl flights
Heathrow to Dallas/Fort Worth flights
Manchester to Orlando flights
Heathrow to O'Hare Intl flights
Manchester to John F Kennedy Intl flights
Heathrow to Las Vegas flights
Heathrow to Baltimore flights
Gatwick to Boston flights
London City to Newark flights
Heathrow to Seattle flights
Gatwick to Orlando flights
Gatwick to Los Angeles flights
Stansted to Los Angeles flights
Heathrow to Hobby flights
Heathrow to Atlanta flights
London City to Los Angeles flights
Stansted to Orlando flights
Stansted to LaGuardia flights
Gatwick to Miami flights
Stansted to Miami flights
London City to Miami flights
Heathrow to Tampa flights
Gatwick to San Francisco flights
London City to Boston flights
Heathrow to George Bush Intcntl flights
London City to San Francisco flights
Gatwick to Dulles Intl flights
Stansted to San Francisco flights
Stansted to Boston flights
Manchester to Newark flights
Heathrow to Reagan-National flights
Manchester to LaGuardia flights
Stansted to Dulles Intl flights
London City to Orlando 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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