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Cheap flights from London to Delaware from £264

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 24/1. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
10 Jan — 17 Jan1
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 11 December 2025.

Mon 29/1206:05LHR - PHL
1 stop14h 05mFinnair
Mon 12/116:44PHL - LHR
2 stops11h 56mFinnair
Deal found 10/12£559
Mon 29/1209:00LHR - PHL
2 stops34h 50mAir Canada
Mon 12/107:50PHL - LHR
2 stops31h 45mAir Canada
Deal found 9/12£581
Mon 29/1211:10LHR - PHL
1 stop16h 36mAir Canada
Mon 9/215:30PHL - LHR
1 stop10h 40mAir Canada
Deal found 9/12£590
Wed 24/1207:50LHR - PHL
1 stop11h 05mBritish Airways
Sat 10/115:40PHL - LHR
1 stop9h 50mBritish Airways
Deal found 10/12£592
Wed 24/1219:30LHR - PHL
1 stop25h 35mLufthansa
Sat 10/115:30PHL - LHR
2 stops36h 50mLufthansa
Deal found 9/12£593
Wed 24/1209:00LHR - PHL
2 stops34h 50mAir Canada
Sat 10/116:35PHL - LHR
2 stops47h 00mAir Canada
Deal found 9/12£597
Wed 24/1208:15LHR - PHL
1 stop12h 20mFinnair
Sat 10/109:47PHL - LHR
2 stops15h 33mFinnair
Deal found 10/12£599
Wed 24/1206:50LCY - PHL
1 stop12h 05mBritish Airways
Sat 10/121:25PHL - LCY
1 stop10h 15mBritish Airways
Deal found 9/12£671
Thu 25/1214:00LGW - PHL
1 stop14h 56mMultiple Airlines
Sat 10/120:43PHL - LGW
1 stop32h 17mMultiple Airlines
Deal found 9/12£675
Mon 29/1214:00LGW - PHL
1 stop23h 37mMultiple Airlines
Mon 9/210:31PHL - LGW
1 stop18h 29mMultiple Airlines
Deal found 9/12£677
Wed 31/1207:50LCY - PHL
1 stop12h 45mBritish Airways
Mon 9/221:25PHL - LCY
1 stop10h 15mBritish Airways
Deal found 9/12£692
Wed 24/1206:50LCY - PHL
1 stop12h 05mMultiple Airlines
Sat 10/121:25PHL - LCY
1 stop10h 15mMultiple Airlines
Deal found 9/12£711

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 11 December 2025.

Round-trip from

£540

One-way from

£264

Popular in

December

Cheapest in

February

Average price

£726
Finnair
  • Finnair
  • 12/1-19/1
  • Nonstop
  • 15h 15m total
  • London to Delaware
Search Deals
24/1
  • 24/1
  • 2 total stops
  • 27h 21m total
  • London to Delaware
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£24 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 11 December 2025.
Use the filters below to find and compare flights from London to Delaware that are best for you.

Fly from

London

Fly to

Delaware

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 6/4

08:25-14:00

1 stop10h 35m

Philadelphia

Mon 20/4

18:45-06:50

Nonstop7h 05m

£542

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 18/4

13:30-10:28

2 stops25h 58m

Philadelphia

Sat 25/4

16:25-21:00

2 stops47h 35m

£542

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 15/2

12:00-15:24

2 stops32h 24m

Philadelphia

Sun 22/2

17:00-07:55

1 stop33h 55m

£543

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 11/3

10:05-14:10

Nonstop8h 05m

Philadelphia

Mon 16/3

20:45-07:50

Nonstop7h 05m

£543

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 6/4

15:30-16:00

1 stop29h 30m

Philadelphia

Mon 20/4

09:15-21:00

2 stops30h 45m

£544

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Sat 28/2

21:00-10:47

2 stops42h 47m

Philadelphia

Sat 21/3

18:30-23:05

1 stop24h 35m

£545

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 12/1

10:15-13:30

Nonstop8h 15m

Philadelphia

Mon 19/1

19:50-07:50

Nonstop7h 00m

£545

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 23/1

09:00-21:36

2 stops17h 36m

Philadelphia

Mon 26/1

10:30-05:55

2 stops14h 25m

£552

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 12/1

12:50-15:35

1 stop31h 45m

Philadelphia

Mon 19/1

18:35-06:35

Nonstop7h 00m

£559

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 12/1

10:15-13:30

Nonstop8h 15m

Philadelphia

Mon 19/1

19:50-07:50

Nonstop7h 00m

£563

Flights are sorted by cheapest return flights first.

Deals found on 10/12

Showing 1-10 of 60 results
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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?

    British Airways, United Airlines, and TAP AIR PORTUGAL can get you from London to Delaware in just under 10h 35m. Your travel time can differ by up to 15h 23m. 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 £42. Users have also found prices from £50 and £62 on Wizz Air and Ryanair, 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

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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.
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Heathrow to Newark flights
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Heathrow to Atlanta flights
London City to Los Angeles flights
Manchester to Newark flights
Stansted to Boston flights
Heathrow to Fort Lauderdale flights
Manchester to LaGuardia flights
Heathrow to George Bush Intcntl flights
Luton to Boston flights
London City to Orlando flights
Luton to Miami flights
Edinburgh to LaGuardia flights
London City to Dallas/Fort Worth 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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