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Cheap flights from London Heathrow Airport to Delaware from £368

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 13/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ILG
9 Nov — 16 Nov1
1 adult
1 adult, Economy

Cheap flight deals from Heathrow to Delaware

Keep the following information in mind while searching for Heathrow to Delaware flight deals. Data was last updated 10 October 2025.

Round-trip from

£442

One-way from

£368

Popular in

December

Cheapest in

February

Average price

£549
Air Canada
  • Air Canada
  • 23/11-30/11
  • 4 total stops
  • 61h 01m total
  • London to Delaware
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Finnair
  • Finnair
  • 13/1
  • Nonstop
  • 8h 05m total
  • London to Delaware
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£16 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
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Find flight deals from Heathrow to Delaware

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Delaware
Explore the most affordable flight options available from Heathrow to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 October 2025.

Sun 23/1113:45LHR - PHL
2 stops38h 01mAir Canada
Sun 30/1116:35PHL - LHR
2 stops23h 00mAir Canada
Deal found 9/10£442
Wed 5/1109:00LHR - PHL
2 stops18h 46mAir Canada
Sat 29/1116:35PHL - LHR
2 stops47h 00mAir Canada
Deal found 9/10£443
Mon 10/1113:25LHR - PHL
2 stops14h 21mAir Canada
Mon 17/1109:20PHL - LHR
2 stops16h 50mAir Canada
Deal found 10/10£444
Wed 12/1109:00LHR - PHL
2 stops18h 46mAir Canada
Tue 18/1115:30PHL - LHR
1 stop10h 40mAir Canada
Deal found 10/10£445
Mon 24/1113:25LHR - PHL
1 stop30h 22mAir Canada
Sun 7/1216:35PHL - LHR
2 stops33h 35mAir Canada
Deal found 9/10£446
Wed 12/1109:20LHR - PHL
1 stop16h 20mJetBlue
Sun 16/1106:00PHL - LHR
1 stop19h 55mJetBlue
Deal found 8/10£449
Fri 21/1109:00LHR - PHL
2 stops18h 46mAir Canada
Mon 24/1109:20PHL - LHR
2 stops30h 15mAir Canada
Deal found 10/10£451
Fri 21/1109:00LHR - PHL
2 stops18h 46mAir Canada
Tue 2/1216:35PHL - LHR
2 stops23h 00mAir Canada
Deal found 9/10£451
Tue 4/1109:20LHR - PHL
1 stop16h 20mJetBlue
Tue 11/1116:52PHL - LHR
1 stop9h 03mJetBlue
Deal found 9/10£452
Tue 18/1107:25LHR - PHL
2 stops18h 15mIcelandair
Thu 27/1106:00PHL - LHR
1 stop19h 55mIcelandair
Deal found 10/10£453
Tue 4/1109:20LHR - PHL
1 stop11h 37mJetBlue
Wed 10/1216:32PHL - LHR
1 stop9h 23mJetBlue
Deal found 9/10£454

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow 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 10 October 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Delaware that are best for you.

Fly from

Heathrow

Fly to

Delaware

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 19/1

09:20-21:24

1 stop17h 04m

Philadelphia

Tue 3/2

13:30-06:55

1 stop12h 25m

£446

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 24/11

07:40-21:21

2 stops18h 41m

Philadelphia

Mon 1/12

09:20-20:35

2 stops30h 15m

£474

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 5/3

09:20-15:52

1 stop11h 32m

Philadelphia

Mon 9/3

16:48-06:55

1 stop10h 07m

£475

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 19/1

09:20-21:24

1 stop17h 04m

Philadelphia

Sun 1/2

13:30-06:55

1 stop12h 25m

£477

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 18/1

09:20-21:24

1 stop17h 04m

Philadelphia

Wed 4/2

13:30-06:55

1 stop12h 25m

£477

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 16/1

09:20-21:24

1 stop17h 04m

Philadelphia

Tue 20/1

13:30-06:55

1 stop12h 25m

£478

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 23/1

09:20-21:24

1 stop17h 04m

Philadelphia

Tue 27/1

13:30-06:55

1 stop12h 25m

£478

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 14/1

09:20-21:24

1 stop17h 04m

Philadelphia

Fri 23/1

13:30-06:55

1 stop12h 25m

£478

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 23/11

15:30-22:46

2 stops36h 16m

Philadelphia

Sun 30/11

09:20-20:35

2 stops30h 15m

£493

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 22/11

06:30-16:35

1 stop15h 05m

Philadelphia

Sat 29/11

16:35-20:35

2 stops47h 00m

£505

Flights are sorted by cheapest return flights first.

Deals found on 10/10

Showing 1-10 of 20 results
1
2

Best time to book a flight from Heathrow to Delaware

Have a flexible travel schedule? Discover the best time to fly to Delaware from Heathrow 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 Heathrow Airport 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 Heathrow 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 Heathrow Airport to Delaware?

    Departing from London Heathrow Airport to Delaware will take you 17h 04m. Airlines will cover a distance of 3533 mi. Both multi-stop and direct flights can be found to your destination and back.

  • Can I find deals for flights from Heathrow to Delaware that include hotel bookings?

    Yes. In addition to deals on Heathrow to Delaware flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Delaware?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Delaware.

  • Can I find deals for business class flights from Heathrow to Delaware?

    Yes. Cheapflights offers flight deals from Heathrow 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 Heathrow 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 Seattle flights
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Heathrow to Tampa flights
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London City to Orlando flights
Heathrow to Reagan-National flights
Gatwick to Dulles Intl flights
Heathrow to George Bush Intcntl flights
Gatwick to Baltimore flights
Gatwick to Los Angeles flights
London City to Dulles Intl flights
London City to Boston flights
Stansted to Miami flights
London City to Los Angeles flights
Stansted to Dulles Intl flights
Heathrow to Philadelphia flights
Gatwick to San Francisco flights
Gatwick to Reagan-National flights
Luton to Dulles Intl flights
Stansted to Boston flights
Gatwick to Dallas/Fort Worth flights
London City to San Francisco flights
Luton to Boston flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Heathrow to Delaware?

Cheapflights makes it easy to find Heathrow to Delaware flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Delaware?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Delaware.

Can Cheapflights find flights from Heathrow to Delaware with no change fees?

Need flexible booking options for your flight to Delaware from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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