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Cheap flights from London to Delaware from £246

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 29/1. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
11 Jan — 18 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 12 December 2025.

Mon 29/1206:05LHR - PHL
1 stop14h 05mFinnair
Mon 12/116:44PHL - LHR
1 stop9h 16mFinnair
Deal found 10/12£556
Wed 24/1207:50LHR - PHL
1 stop11h 05mBritish Airways
Sat 10/115:40PHL - LHR
1 stop9h 50mBritish Airways
Deal found 10/12£589
Wed 24/1208:15LHR - PHL
1 stop12h 20mFinnair
Sat 10/109:47PHL - LHR
2 stops15h 33mFinnair
Deal found 10/12£596
Thu 25/1214:10LHR - PHL
1 stop24h 31mFinnair
Thu 8/111:00PHL - LHR
1 stop14h 30mFinnair
Deal found 11/12£597
Fri 26/1206:30LHR - PHL
1 stop12h 25mBritish Airways
Thu 8/115:35PHL - LHR
1 stop10h 25mBritish Airways
Deal found 11/12£600
Thu 25/1206:30LHR - PHL
1 stop14h 35mUnited Airlines
Thu 8/119:45PHL - LHR
1 stop10h 05mUnited Airlines
Deal found 11/12£605
Mon 22/1211:55LGW - PHL
2 stops35h 15mIcelandair
Wed 7/108:40PHL - LGW
2 stops21h 15mIcelandair
Deal found 11/12£630
Fri 26/1216:40LGW - PHL
2 stops44h 15mTAP AIR PORTUGAL
Sat 10/108:10PHL - LGW
2 stops20h 40mTAP AIR PORTUGAL
Deal found 11/12£642
Fri 26/1216:40LGW - PHL
2 stops44h 15mTAP AIR PORTUGAL
Fri 9/108:40PHL - LGW
2 stops44h 10mTAP AIR PORTUGAL
Deal found 11/12£647
Thu 25/1214:00LGW - PHL
1 stop15h 40mMultiple Airlines
Sun 11/118:01PHL - LGW
1 stop34h 59mMultiple Airlines
Deal found 11/12£655
Fri 26/1216:40LGW - PHL
2 stops44h 15mTAP AIR PORTUGAL
Thu 8/108:40PHL - LGW
2 stops26h 10mTAP AIR PORTUGAL
Deal found 11/12£662
Thu 25/1218:40LGW - PHL
2 stops31h 51mSWISS
Thu 8/117:40PHL - LGW
2 stops19h 10mSWISS
Deal found 11/12£668

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 12 December 2025.

Round-trip from

£539

One-way from

£246

Popular in

December

Cheapest in

February

Average price

£723
British Airways
  • British Airways
  • 15/1-19/1
  • 1 total stop
  • 18h 15m total
  • London to Delaware
Search Deals
29/1
  • 29/1
  • 1 total stop
  • 24h 59m 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 12 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

Thu 12/2

06:30-14:00

1 stop12h 30m

Philadelphia

Thu 26/2

19:45-07:50

Nonstop7h 05m

£540

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 22/4

06:30-15:30

1 stop14h 00m

Philadelphia

Tue 28/4

15:35-07:50

1 stop11h 15m

£543

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 6/1

09:00-22:46

2 stops42h 46m

Philadelphia

Mon 12/1

19:45-10:05

2 stops33h 20m

£546

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Wed 22/4

12:05-07:33

2 stops24h 28m

Philadelphia

Tue 28/4

17:03-15:35

2 stops17h 32m

£564

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Wed 22/4

12:05-07:33

2 stops24h 28m

Philadelphia

Tue 28/4

19:26-15:35

2 stops15h 09m

£564

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Mon 2/2

06:50-14:05

1 stop12h 15m

Philadelphia

Mon 16/2

20:00-14:35

1 stop13h 35m

£564

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 24/1

09:00-22:46

2 stops42h 46m

Philadelphia

Sat 31/1

15:30-10:45

2 stops14h 15m

£565

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Sun 25/1

07:45-22:46

3 stops20h 01m

Philadelphia

Sun 1/2

15:30-15:45

3 stops19h 15m

£568

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 21/2

06:30-14:00

1 stop12h 30m

Philadelphia

Sat 7/3

15:40-07:00

1 stop10h 20m

£569

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 15/1

06:30-14:05

1 stop12h 35m

Philadelphia

Fri 30/1

18:35-06:35

Nonstop7h 00m

£570

Flights are sorted by cheapest return flights first.

Deals found on 12/12

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 12h 30m. Your travel time can differ by up to 30h 16m. 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 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

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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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Stansted to Los Angeles flights
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Luton to Miami flights
London City to Las Vegas flights
Edinburgh 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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