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Cheap flights from London to Delaware from £340

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 17/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
30 Jun — 7 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 31 May 2026.

Wed 24/608:40
LHR
-
PHL
1 stop16h 20m
JetBlue
Tue 30/608:28
PHL
-
LHR
1 stop17h 02m
JetBlue
Deal found 26/5£605
Mon 20/708:15
STN
-
PHL
2 stops18h 19m
Multiple Airlines
Mon 27/710:05
PHL
-
STN
3 stops27h 45m
Multiple Airlines
Deal found 27/5£610
Sun 13/907:30
LHR
-
PHL
1 stop13h 35m
United Airlines
Sun 20/907:00
PHL
-
LHR
2 stops33h 00m
United Airlines
Deal found 28/5£610
Fri 12/614:00
LGW
-
PHL
1 stop23h 51m
Multiple Airlines
Fri 19/620:37
PHL
-
LGW
2 stops32h 23m
Multiple Airlines
Deal found 27/5£611
Tue 23/608:40
LHR
-
PHL
1 stop16h 20m
JetBlue
Sat 27/620:55
PHL
-
LHR
1 stop28h 35m
JetBlue
Deal found 26/5£611
Thu 11/612:00
LHR
-
PHL
1 stop11h 55m
Aer Lingus
Sun 14/620:25
PHL
-
LHR
1 stop9h 45m
Aer Lingus
Deal found 28/5£612
Fri 26/608:40
LHR
-
PHL
1 stop16h 20m
JetBlue
Mon 29/621:29
PHL
-
LHR
1 stop28h 01m
JetBlue
Deal found 28/5£613
Sun 14/608:40
LHR
-
PHL
1 stop27h 58m
JetBlue
Tue 30/608:28
PHL
-
LHR
1 stop17h 02m
JetBlue
Deal found 27/5£614
Thu 10/906:00
LHR
-
PHL
2 stops16h 54m
SWISS
Thu 24/907:00
PHL
-
LHR
2 stops18h 30m
SWISS
Deal found 28/5£615
Tue 7/709:30
LHR
-
PHL
1 stop10h 19m
Air Canada
Thu 10/1209:15
PHL
-
LHR
2 stops16h 55m
Air Canada
Deal found 28/5£617
Fri 29/514:00
LGW
-
PHL
2 stops25h 41m
Multiple Airlines
Sun 19/712:46
PHL
-
LGW
1 stop16h 14m
Multiple Airlines
Deal found 28/5£617
Wed 14/1012:05
LGW
-
PHL
2 stops26h 45m
TAP AIR PORTUGAL
Mon 26/1015:30
PHL
-
LGW
2 stops14h 20m
TAP AIR PORTUGAL
Deal found 28/5£619

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 31 May 2026.

Round-trip from

£605

One-way from

£340

Popular in

December

Cheapest in

September

Average price

£605
JetBlue
  • JetBlue
  • 7/7-8/12
  • 2 total stops
  • 31h 56m total
  • London to Delaware
Search Deals
23/6
  • 23/6
  • 3 total stops
  • 30h 17m 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 (£6 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 31 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

Tue 9/6

05:40-21:33

3 stops20h 53m

Philadelphia

Tue 25/8

13:15-22:25

2 stops28h 10m

£650

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 7/7

09:30-16:05

1 stop11h 35m

Philadelphia

Tue 21/7

15:10-10:25

2 stops14h 15m

£653

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Mon 5/10

09:35-17:50

1 stop13h 15m

Philadelphia

Mon 12/10

18:50-17:20

1 stop17h 30m

£658
Fastest return journey

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/10

13:45-16:40

Nonstop7h 55m

Philadelphia

Mon 12/10

19:40-07:50

Nonstop7h 10m

£664

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 4/9

06:20-16:10

1 stop14h 50m

Philadelphia

Mon 7/9

19:25-07:50

Nonstop7h 25m

£674

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Thu 2/7

07:50-14:49

3 stops35h 59m

Philadelphia

Tue 14/7

17:40-23:25

2 stops24h 45m

£677

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Tue 7/7

19:15-16:05

2 stops25h 50m

Philadelphia

Thu 10/12

17:40-12:50

2 stops14h 10m

£678

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Mon 13/7

06:10-22:46

3 stops21h 36m

Philadelphia

Sun 19/7

17:40-23:30

2 stops24h 50m

£689

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 25/6

06:50-18:54

2 stops17h 04m

Philadelphia

Sun 28/6

17:00-06:45

1 stop32h 45m

£691

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Thu 3/9

06:45-16:10

1 stop14h 25m

Philadelphia

Mon 7/9

18:30-18:20

1 stop18h 50m

£695

Flights are sorted by cheapest return flights first.

Deals found on 27/5

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, British Airways, and SWISS can get you from London to Delaware in just under 11h 35m. Your travel time can differ by up to 14h 15m. 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 £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
Gatwick to Newark flights
Stansted to John F Kennedy Intl 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 Boston flights
Stansted to Newark flights
Heathrow to Miami flights
Luton to Newark flights
London City to Newark flights
Heathrow to Dulles Intl flights
Heathrow to O'Hare Intl flights
Manchester to Orlando flights
Manchester to John F Kennedy Intl flights
Heathrow to Dallas/Fort Worth flights
Heathrow to San Francisco flights
Heathrow to Baltimore flights
Gatwick to Boston flights
Gatwick to Orlando flights
Gatwick to Los Angeles flights
Heathrow to Las Vegas flights
Heathrow to Hobby flights
Stansted to Los Angeles flights
London City to Los Angeles flights
Stansted to LaGuardia flights
Heathrow to Seattle flights
Stansted to Orlando flights
Gatwick to Miami flights
London City to Miami flights
Stansted to Miami flights
Heathrow to Austin flights
Heathrow to George Bush Intcntl flights
Manchester to Newark flights
Heathrow to Tampa flights
London City to Boston flights
Heathrow to Atlanta flights
Heathrow to Denver flights
Stansted to Boston flights
Heathrow to Reagan-National flights
Gatwick to Dulles Intl flights
Gatwick to San Francisco flights
Luton to Miami flights
London City to Orlando flights
Manchester 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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