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Cheap flights from London to Delaware from £420

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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
24 May — 31 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 24 April 2026.

Wed 30/908:40
LHR
-
PHL
2 stops35h 07m
Air Canada
Tue 20/1016:20
PHL
-
LHR
2 stops23h 40m
Air Canada
Deal found 21/4£580
Fri 29/514:00
LGW
-
PHL
1 stop23h 54m
Multiple Airlines
Thu 11/607:20
PHL
-
LGW
2 stops21h 40m
Multiple Airlines
Deal found 20/4£580
Tue 22/908:40
LHR
-
PHL
1 stop14h 24m
JetBlue
Mon 28/915:25
PHL
-
LHR
1 stop10h 05m
JetBlue
Deal found 20/4£581
Mon 14/907:30
LHR
-
PHL
1 stop13h 35m
United Airlines
Mon 21/910:35
PHL
-
LHR
2 stops29h 25m
United Airlines
Deal found 20/4£582
Thu 4/611:05
LGW
-
PHL
1 stop12h 50m
Multiple Airlines
Tue 9/620:25
PHL
-
LGW
1 stop9h 40m
Multiple Airlines
Deal found 24/4£583
Wed 23/908:40
LHR
-
PHL
2 stops17h 52m
Air Canada
Mon 28/907:00
PHL
-
LHR
2 stops22h 00m
Air Canada
Deal found 20/4£584
Wed 3/608:50
LHR
-
PHL
1 stop15h 05m
Aer Lingus
Wed 10/620:25
PHL
-
LHR
1 stop12h 05m
Aer Lingus
Deal found 19/4£585
Tue 2/608:40
LHR
-
PHL
1 stop15h 12m
JetBlue
Wed 1/708:28
PHL
-
LHR
1 stop17h 02m
JetBlue
Deal found 21/4£586
Tue 23/614:00
LGW
-
PHL
1 stop15h 44m
Multiple Airlines
Tue 14/706:42
PHL
-
LGW
1 stop22h 18m
Multiple Airlines
Deal found 21/4£586
Tue 22/906:00
LHR
-
PHL
2 stops21h 46m
Air Canada
Mon 28/907:00
PHL
-
LHR
2 stops22h 00m
Air Canada
Deal found 20/4£587
Wed 27/514:00
LGW
-
PHL
1 stop23h 54m
Multiple Airlines
Fri 19/607:00
PHL
-
LGW
2 stops22h 00m
Multiple Airlines
Deal found 20/4£587
Wed 3/606:30
STN
-
PHL
1 stop17h 25m
Multiple Airlines
Wed 10/620:25
PHL
-
STN
1 stop10h 10m
Multiple Airlines
Deal found 24/4£589

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 24 April 2026.

Round-trip from

£580

One-way from

£420

Popular in

December

Cheapest in

September

Average price

£625
Air Canada
  • Air Canada
  • 30/9-20/10
  • 4 total stops
  • 58h 47m total
  • London to Delaware
Search Deals
4/6
  • 4/6
  • 2 total stops
  • 29h 35m total
  • London to Delaware
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (£3 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 24 April 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

STN - PHL

STNPHL

London Stansted

Mon 8/6

08:30-18:55

1 stop15h 25m

Philadelphia

Mon 15/6

20:25-17:05

1 stop15h 40m

£592

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Tue 9/6

08:30-18:55

1 stop15h 25m

Philadelphia

Tue 23/6

20:25-19:35

1 stop18h 10m

£600

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Mon 8/6

12:25-18:55

1 stop11h 30m

Philadelphia

Mon 15/6

20:25-15:45

1 stop14h 20m

£605

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Tue 23/6

09:40-18:55

1 stop14h 15m

Philadelphia

Sun 28/6

20:25-15:25

1 stop14h 00m

£628

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Mon 1/6

18:05-21:33

3 stops32h 28m

Philadelphia

Mon 8/6

15:25-22:50

3 stops26h 25m

£635

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Mon 11/5

12:25-18:55

1 stop11h 30m

Philadelphia

Mon 18/5

20:25-12:45

1 stop11h 20m

£641

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Mon 14/9

09:15-16:05

1 stop11h 50m

Philadelphia

Mon 21/9

17:40-17:55

1 stop19h 15m

£646

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Wed 23/9

14:30-13:30

1 stop28h 00m

Philadelphia

Sun 27/9

17:50-06:50

1 stop32h 00m

£649

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 11/5

07:30-16:05

1 stop13h 35m

Philadelphia

Mon 18/5

15:25-10:00

1 stop13h 35m

£651

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Tue 20/10

09:15-16:05

1 stop11h 50m

Philadelphia

Tue 10/11

17:40-09:15

1 stop10h 35m

£660

Flights are sorted by cheapest return flights first.

Deals found on 20/4

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?

    Lufthansa, British Airways, and United Airlines can get you from London to Delaware in just under 11h 50m. Your travel time can differ by up to 16h 10m. London and Delaware are separated by a distance of 3553 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
Heathrow to Los Angeles flights
Gatwick to LaGuardia flights
Luton to John F Kennedy Intl flights
Heathrow to Orlando flights
Heathrow to Boston flights
Stansted to Newark flights
Luton to Newark flights
London City to Newark flights
Heathrow to Miami flights
Heathrow to Dulles Intl flights
Heathrow to Dallas/Fort Worth flights
Heathrow to San Francisco flights
Heathrow to O'Hare Intl flights
Manchester to Orlando flights
Heathrow to Las Vegas flights
Manchester to John F Kennedy Intl flights
Gatwick to Orlando flights
Gatwick to Boston flights
Gatwick to Los Angeles flights
Stansted to Los Angeles flights
Heathrow to Seattle flights
London City to Los Angeles flights
Heathrow to Baltimore flights
Heathrow to Hobby flights
London City to Boston flights
Stansted to Orlando flights
Gatwick to Miami flights
Heathrow to Tampa flights
Heathrow to Atlanta flights
Heathrow to Ontario flights
Stansted to Boston flights
Stansted to Miami flights
Gatwick to San Francisco flights
Heathrow to Denver flights
Luton to Los Angeles flights
London City to Orlando flights
Stansted to LaGuardia flights
Manchester to Newark flights
Heathrow to George Bush Intcntl flights
London City to San Francisco flights
Gatwick to Dulles Intl flights
Stansted to San Francisco flights
Heathrow to Santa Ana 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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