Find flights
Deals
When to book
FAQs

Cheap flights from London to Delaware from £435

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 14/7. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
30 May — 6 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 30 April 2026.

Sat 11/709:30
LHR
-
PHL
1 stop10h 19m
Air Canada
Sat 25/715:25
PHL
-
LHR
1 stop10h 05m
Air Canada
Deal found 27/4£586
Tue 2/608:40
LHR
-
PHL
1 stop15h 12m
JetBlue
Wed 1/708:28
PHL
-
LHR
1 stop17h 02m
JetBlue
Deal found 27/4£587
Thu 4/612:00
STN
-
PHL
1 stop11h 55m
Multiple Airlines
Sun 14/620:25
PHL
-
STN
1 stop11h 30m
Multiple Airlines
Deal found 30/4£588
Thu 21/506:55
LHR
-
PHL
2 stops14h 10m
Lufthansa
Sat 6/615:25
PHL
-
LHR
2 stops48h 35m
Lufthansa
Deal found 27/4£588
Thu 4/609:25
LTN
-
PHL
1 stop14h 30m
Multiple Airlines
Sun 14/620:25
PHL
-
LTN
1 stop10h 00m
Multiple Airlines
Deal found 30/4£590
Thu 4/613:25
LHR
-
PHL
1 stop10h 30m
Aer Lingus
Sat 13/620:25
PHL
-
LHR
1 stop12h 30m
Aer Lingus
Deal found 26/4£593
Wed 10/608:50
LGW
-
PHL
1 stop15h 05m
Multiple Airlines
Wed 17/620:25
PHL
-
LGW
1 stop16h 25m
Multiple Airlines
Deal found 26/4£593
Tue 19/511:55
LGW
-
PHL
1 stop12h 00m
Multiple Airlines
Wed 3/620:25
PHL
-
LGW
1 stop17h 00m
Multiple Airlines
Deal found 29/4£595
Thu 4/608:40
LGW
-
PHL
1 stop15h 15m
Multiple Airlines
Sun 14/620:25
PHL
-
LGW
1 stop10h 35m
Multiple Airlines
Deal found 30/4£596
Thu 4/612:20
LGW
-
PHL
1 stop11h 32m
JetBlue
Sat 13/620:55
PHL
-
LGW
1 stop31h 40m
JetBlue
Deal found 26/4£597
Mon 31/815:30
LHR
-
PHL
1 stop29h 35m
United Airlines
Tue 8/910:35
PHL
-
LHR
2 stops29h 25m
United Airlines
Deal found 28/4£598
Mon 24/811:10
LHR
-
PHL
1 stop13h 01m
American Airlines
Thu 10/913:29
PHL
-
LHR
1 stop15h 11m
American Airlines
Deal found 28/4£599

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 30 April 2026.

Round-trip from

£586

One-way from

£435

Popular in

December

Cheapest in

September

Average price

£625
Air Canada
  • Air Canada
  • 11/7-25/7
  • 2 total stops
  • 20h 24m total
  • London to Delaware
Search Deals
Lufthansa
  • Lufthansa
  • 14/7
  • 1 total stop
  • 11h 50m total
  • London to Delaware
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (£2 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 30 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

LHR - PHL

LHRPHL

London Heathrow

Thu 14/5

15:30-16:05

1 stop29h 35m

Philadelphia

Mon 18/5

06:00-06:30

2 stops19h 30m

£650

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 6/10

07:25-18:52

2 stops16h 27m

Philadelphia

Fri 23/10

13:00-06:45

1 stop12h 45m

£657

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 25/9

06:30-16:05

1 stop14h 35m

Philadelphia

Thu 8/10

17:40-10:40

1 stop12h 00m

£659

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Wed 23/9

10:35-09:50

2 stops28h 15m

Philadelphia

Sun 27/9

06:00-09:45

2 stops22h 45m

£668

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Mon 1/6

09:15-16:05

1 stop11h 50m

Philadelphia

Mon 8/6

17:40-17:55

1 stop19h 15m

£675

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Mon 1/6

06:30-18:55

1 stop17h 25m

Philadelphia

Mon 8/6

20:25-21:20

1 stop19h 55m

£682

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Mon 25/5

08:30-18:55

1 stop15h 25m

Philadelphia

Mon 1/6

20:25-19:25

1 stop18h 00m

£685

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 20/5

07:25-18:58

2 stops16h 33m

Philadelphia

Sun 24/5

15:10-20:40

2 stops24h 30m

£689

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Sat 13/6

06:35-18:55

1 stop17h 20m

Philadelphia

Sat 20/6

20:25-17:35

1 stop16h 10m

£690

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 17/6

06:15-16:00

1 stop14h 45m

Philadelphia

Wed 24/6

19:20-07:50

Nonstop7h 30m

£691

Flights are sorted by cheapest return flights first.

Deals found on 25/4

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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, Lufthansa, and TAP AIR PORTUGAL can get you from London to Delaware in just under 14h 35m. Your travel time can differ by up to 15h. 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 £78 on Ryanair and Wizz Air, 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 City - Philadelphia or London Gatwick - 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.