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Cheap flights from London to Delaware from £406

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 21/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
31 ago — 7 set1
1 adult

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 26 agosto 2025.

Round-trip from

£477

One-way from

£406

Popular in

August

Cheapest in

February

Average price

£677
Air Canada
  • Air Canada
  • 11/9-14/9
  • 4 total stops
  • 27h 43m total
  • London to Delaware
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21/9
  • 21/9
  • 3 total stops
  • 33h 12m total
  • London to Delaware
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£31 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
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Average for round-trip flights in August 2025
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Find flight deals from London to Delaware

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 26 agosto 2025.

qui 11/906:50LHR - PHL
2 stops12h 48mAir Canada
dom 14/910:35PHL - LHR
2 stops14h 55mAir Canada
Deal found 25/8£477
qui 9/1008:30LHR - PHL
2 stops15h 27mUnited Airlines
qui 16/1019:58PHL - LHR
1 stop9h 42mUnited Airlines
Deal found 25/8£477
sex 28/1106:50LHR - PHL
2 stops12h 57mAir Canada
qua 3/1215:30PHL - LHR
1 stop10h 40mAir Canada
Deal found 24/8£479
ter 18/1106:50LHR - PHL
2 stops12h 57mAir Canada
qui 27/1110:34PHL - LHR
2 stops14h 56mAir Canada
Deal found 24/8£480
sáb 22/1106:30LHR - PHL
1 stop15h 05mLufthansa
sáb 29/1115:30PHL - LHR
1 stop10h 40mLufthansa
Deal found 24/8£480
seg 1/907:30LHR - PHL
1 stop13h 30mUnited Airlines
ter 9/915:25PHL - LHR
1 stop10h 05mUnited Airlines
Deal found 24/8£481
seg 1/917:40LHR - PHL
1 stop21h 14mAir Canada
ter 9/915:25PHL - LHR
1 stop10h 05mAir Canada
Deal found 24/8£482
qua 8/1020:05LHR - PHL
2 stops24h 55mSWISS
qua 15/1017:35PHL - LHR
2 stops17h 50mSWISS
Deal found 24/8£483
ter 7/1008:55LHR - PHL
1 stop13h 58mBritish Airways
seg 13/1018:30PHL - LHR
Nonstop7h 10mBritish Airways
Deal found 24/8£484
seg 1/910:05LHR - PHL
1 stop28h 22mFinnair
dom 14/919:09PHL - LHR
1 stop31h 31mFinnair
Deal found 25/8£485
ter 7/1012:30LHR - PHL
Nonstop8h 05mFinnair
seg 13/1022:15PHL - LHR
Nonstop7h 05mFinnair
Deal found 24/8£486
seg 8/914:00LGW - PHL
1 stop28h 02mMultiple Airlines
qua 10/914:07PHL - LGW
1 stop14h 53mMultiple Airlines
Deal found 24/8£488

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 26 agosto 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

qui 11/9

06:50-14:38

2 stops12h 48m

Philadelphia

dom 14/9

10:35-06:30

2 stops14h 55m

£477

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

qui 9/10

06:50-14:38

2 stops12h 48m

Philadelphia

qui 16/10

15:25-11:50

2 stops15h 25m

£477

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

qui 9/10

08:30-18:57

2 stops15h 27m

Philadelphia

qui 16/10

19:58-10:40

1 stop9h 42m

£477

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

ter 7/10

09:30-16:00

1 stop11h 30m

Philadelphia

seg 13/10

07:30-14:20

2 stops25h 50m

£479

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

ter 16/9

06:50-17:21

2 stops15h 31m

Philadelphia

ter 30/9

10:32-05:55

2 stops14h 23m

£479

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

sex 28/11

06:50-14:47

2 stops12h 57m

Philadelphia

qua 3/12

15:30-07:10

1 stop10h 40m

£479

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

dom 21/9

06:50-14:38

2 stops12h 48m

Philadelphia

dom 28/9

10:35-06:30

2 stops14h 55m

£479

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

dom 5/10

06:50-14:38

2 stops12h 48m

Philadelphia

ter 21/10

13:05-08:35

2 stops14h 30m

£480

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

qui 11/9

06:50-14:38

2 stops12h 48m

Philadelphia

qui 18/9

07:30-06:35

1 stop18h 05m

£480

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

qua 12/11

06:50-14:47

2 stops12h 57m

Philadelphia

dom 16/11

15:30-11:20

2 stops14h 50m

£480

Flights are sorted by cheapest return flights first.

Deals found on 25/8

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?

    Air Canada, United Airlines, and JetBlue can get you from London to Delaware in just under 12h 48m. Your travel time can differ by up to 2h 39m. 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 Aer Lingus. According to our data, you can fly for as low as £408. Users have also found prices from £408 and £503 on JetBlue and Lufthansa, 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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Heathrow to Reagan-National 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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