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Cheap flights from London to Delaware from £367

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 17/12. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
28 Nov — 5 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Delaware

Keep the following information in mind while searching for London to Delaware flight deals. Data was last updated 29 October 2025.

Round-trip from

£449

One-way from

£367

Popular in

December

Cheapest in

February

Average price

£554
19/2-1/3
  • 19/2-1/3
  • 2 total stops
  • 46h 40m total
  • London to Delaware
Search Deals
17/12
  • 17/12
  • 3 total stops
  • 37h 39m total
  • London to Delaware
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£17 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
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Average for round-trip flights in October 2025
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Find 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 29 October 2025.

Tue 25/1107:30LHR - PHL
1 stop13h 35mUnited Airlines
Tue 2/1209:20PHL - LHR
2 stops30h 15mUnited Airlines
Deal found 28/10£453
Tue 25/1109:00LHR - PHL
2 stops34h 47mAir Canada
Sun 7/1209:20PHL - LHR
2 stops30h 15mAir Canada
Deal found 27/10£454
Mon 24/1114:00LGW - PHL
1 stop15h 39mMultiple Airlines
Mon 1/1217:59PHL - LGW
2 stops31h 01mMultiple Airlines
Deal found 27/10£455
Tue 18/1107:25LHR - PHL
2 stops30h 12mIcelandair
Thu 27/1106:00PHL - LHR
1 stop19h 55mIcelandair
Deal found 28/10£458
Mon 24/1109:00LHR - PHL
2 stops18h 46mAir Canada
Mon 1/1209:20PHL - LHR
2 stops30h 15mAir Canada
Deal found 27/10£459
Fri 21/1114:00LGW - PHL
2 stops29h 07mMultiple Airlines
Mon 24/1106:15PHL - LGW
1 stop22h 45mMultiple Airlines
Deal found 28/10£459
Mon 22/1206:30STN - PHL
1 stop14h 30mMultiple Airlines
Fri 2/117:30PHL - STN
1 stop9h 20mMultiple Airlines
Deal found 26/10£460
Mon 22/1206:00LTN - PHL
1 stop15h 00mMultiple Airlines
Fri 2/117:30PHL - LTN
1 stop10h 25mMultiple Airlines
Deal found 26/10£461
Mon 24/1108:50LHR - PHL
1 stop12h 10mAer Lingus
Mon 1/1217:30PHL - LHR
1 stop10h 35mAer Lingus
Deal found 27/10£463
Sat 22/1109:40LGW - PHL
1 stop11h 20mMultiple Airlines
Sat 29/1117:30PHL - LGW
1 stop9h 30mMultiple Airlines
Deal found 27/10£464
Tue 9/1209:20LHR - PHL
1 stop11h 17mJetBlue
Thu 8/113:30PHL - LHR
1 stop12h 25mJetBlue
Deal found 28/10£465
Tue 25/1109:00LHR - PHL
2 stops34h 47mAir Canada
Mon 1/1209:20PHL - LHR
2 stops16h 50mAir Canada
Deal found 27/10£470

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 29 October 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

LGW - PHL

LGWPHL

London Gatwick

Thu 19/2

14:00-00:40

1 stop15h 40m

Philadelphia

Sun 1/3

22:00-10:00

1 stop31h 00m

£449

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Thu 8/1

14:00-08:37

1 stop23h 37m

Philadelphia

Fri 16/1

22:00-10:05

1 stop31h 05m

£458

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Mon 22/12

06:30-16:00

1 stop14h 30m

Philadelphia

Fri 2/1

17:30-07:50

1 stop9h 20m

£460

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Mon 22/12

06:00-16:00

1 stop15h 00m

Philadelphia

Fri 2/1

17:30-08:55

1 stop10h 25m

£461

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Mon 22/12

06:00-16:00

1 stop15h 00m

Philadelphia

Sun 4/1

17:30-08:55

1 stop10h 25m

£477

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 5/12

09:20-21:48

1 stop17h 28m

Philadelphia

Tue 9/12

10:24-06:55

1 stop15h 31m

£481

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 24/11

11:30-16:05

1 stop33h 35m

Philadelphia

Mon 1/12

09:20-20:35

2 stops30h 15m

£488

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 22/4

07:25-22:53

2 stops20h 28m

Philadelphia

Thu 7/5

16:50-21:00

2 stops23h 10m

£493

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Sun 21/12

06:30-16:00

1 stop14h 30m

Philadelphia

Sun 4/1

17:30-11:05

1 stop12h 35m

£498

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Mon 8/12

14:00-23:34

1 stop14h 34m

Philadelphia

Mon 15/12

05:30-10:00

1 stop23h 30m

£509

Flights are sorted by cheapest return flights first.

Deals found on 28/10

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?

    JetBlue, United Airlines, and TAP AIR PORTUGAL can get you from London to Delaware in just under 17h 28m. Your travel time can differ by up to 16h 07m. 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 JetBlue. According to our data, you can fly for as low as £371. Users have also found prices from £377 and £394 on British Airways and TAP AIR PORTUGAL, 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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Gatwick to San Francisco flights
London City to San Francisco flights
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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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