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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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
10 Jul — 17 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 10 June 2026.

Thu 18/614:05
LHR
-
PHL
1 stop12h 29m
Lufthansa
Wed 24/610:05
PHL
-
LHR
2 stops17h 30m
Lufthansa
Deal found 8/6£630
Thu 8/1012:00
STN
-
PHL
1 stop11h 55m
Multiple Airlines
Mon 12/1020:25
PHL
-
STN
1 stop11h 25m
Multiple Airlines
Deal found 9/6£631
Fri 10/709:15
LCY
-
PHL
1 stop11h 50m
Multiple Airlines
Sun 26/717:40
PHL
-
LCY
2 stops13h 55m
Multiple Airlines
Deal found 8/6£631
Thu 18/609:15
LHR
-
PHL
Nonstop7h 55m
British Airways
Tue 30/615:28
PHL
-
LHR
1 stop11h 32m
British Airways
Deal found 8/6£631
Thu 9/714:00
LGW
-
PHL
1 stop15h 51m
Multiple Airlines
Mon 13/716:40
PHL
-
LGW
2 stops36h 20m
Multiple Airlines
Deal found 9/6£631
Thu 3/910:35
LGW
-
PHL
2 stops26h 03m
TAP AIR PORTUGAL
Wed 18/1110:30
PHL
-
LGW
3 stops42h 30m
TAP AIR PORTUGAL
Deal found 8/6£632
Wed 14/1011:20
LHR
-
PHL
3 stops27h 30m
TAP AIR PORTUGAL
Mon 26/1015:30
PHL
-
LHR
2 stops17h 10m
TAP AIR PORTUGAL
Deal found 8/6£632
Thu 18/609:15
LHR
-
PHL
Nonstop7h 55m
Iberia
Wed 24/619:20
PHL
-
LHR
Nonstop7h 30m
Iberia
Deal found 9/6£633
Tue 6/1007:50
LHR
-
PHL
1 stop12h 55m
Iberia
Fri 16/1022:20
PHL
-
LHR
Nonstop7h 00m
Iberia
Deal found 9/6£634
Sat 10/1013:45
LHR
-
PHL
Nonstop7h 55m
American Airlines
Tue 13/1018:50
PHL
-
LHR
1 stop10h 20m
American Airlines
Deal found 9/6£636
Fri 10/709:15
LHR
-
PHL
Nonstop8h 00m
British Airways
Thu 16/717:30
PHL
-
LHR
1 stop9h 30m
British Airways
Deal found 9/6£637
Thu 13/808:30
STN
-
PHL
1 stop15h 25m
Multiple Airlines
Tue 18/820:25
PHL
-
STN
1 stop16h 10m
Multiple Airlines
Deal found 8/6£638

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 10 June 2026.

Round-trip from

£631

One-way from

£342

Popular in

June

Cheapest in

September

Average price

£715
8/10-12/10
  • 8/10-12/10
  • 2 total stops
  • 23h 20m total
  • London to Delaware
Search Deals
JetBlue
  • JetBlue
  • 1/9
  • 1 total stop
  • 16h 20m total
  • London to Delaware
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£54 potential increase over avg. return price).
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 June 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 10 June 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

Fri 9/10

07:55-13:50

1 stop10h 55m

Philadelphia

Mon 12/10

18:45-06:50

Nonstop7h 05m

£640

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 2/9

13:45-16:40

Nonstop7h 55m

Philadelphia

Sun 6/9

19:25-07:50

Nonstop7h 25m

£641

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Tue 1/9

19:15-16:05

2 stops25h 50m

Philadelphia

Tue 15/9

11:04-08:40

2 stops16h 36m

£644

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Tue 7/7

19:15-16:05

2 stops25h 50m

Philadelphia

Tue 14/7

17:40-12:35

2 stops13h 55m

£647

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Fri 4/9

17:15-16:10

1 stop27h 55m

Philadelphia

Tue 8/9

18:30-07:55

1 stop32h 25m

£649

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Mon 7/9

09:25-17:54

2 stops37h 29m

Philadelphia

Thu 17/9

11:04-08:25

2 stops16h 21m

£650

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 7/10

11:20-09:50

2 stops27h 30m

Philadelphia

Mon 19/10

15:25-17:45

3 stops21h 20m

£653

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 4/9

09:15-12:15

Nonstop8h 00m

Philadelphia

Sat 12/9

20:20-08:35

Nonstop7h 15m

£653

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Fri 9/10

09:15-17:54

2 stops37h 39m

Philadelphia

Thu 15/10

17:40-12:35

2 stops13h 55m

£655
Fastest return journey

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 6/12

13:10-16:15

Nonstop8h 05m

Philadelphia

Sun 17/1

18:35-06:35

Nonstop7h 00m

£656

Flights are sorted by cheapest return flights first.

Deals found on 5/6

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?

    Finnair, British Airways, 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 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

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