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Cheap flights from London to Delaware from £376

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 25/8. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ILG
13 Jul — 20 Jul1
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 8 July 2025.

Round-trip from

£452

One-way from

£376

Popular in

August

Cheapest in

February

Average price

£623
JetBlue
  • JetBlue
  • 11/9-18/9
  • 2 total stops
  • 24h 40m total
  • London to Delaware
26/8
  • 26/8
  • 3 total stops
  • 43h 09m total
  • London to Delaware
Highest demand for flights based on searches. 9% potential increase in price (£42 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Average for round-trip flights in July 2025

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 8 July 2025.

Thu 11/908:25LHR - PHL
1 stop14h 20mJetBlue
Thu 18/915:10PHL - LHR
1 stop10h 20mJetBlue
Deal found 7/7£452
Mon 25/810:00LGW - PHL
1 stop19h 49mMultiple Airlines
Mon 1/917:43PHL - LGW
1 stop32h 17mMultiple Airlines
Deal found 6/7£453
Thu 27/1106:30LHR - PHL
1 stop14h 35mLufthansa
Thu 4/1215:30PHL - LHR
1 stop10h 40mLufthansa
Deal found 6/7£457
Wed 3/912:10LGW - PHL
1 stop14h 14mJetBlue
Sun 7/918:40PHL - LGW
1 stop9h 55mJetBlue
Deal found 7/7£460
Mon 1/909:30LHR - PHL
1 stop17h 37mAir Canada
Tue 9/915:25PHL - LHR
1 stop10h 05mAir Canada
Deal found 7/7£463
Mon 17/1107:50LHR - PHL
1 stop11h 05mBritish Airways
Mon 1/1215:35PHL - LHR
1 stop10h 25mBritish Airways
Deal found 7/7£464
Tue 5/817:00LHR - PHL
1 stop26h 05mFinnair
Tue 12/817:29PHL - LHR
2 stops13h 46mFinnair
Deal found 6/7£465
Sat 30/809:30LHR - PHL
2 stops34h 07mUnited Airlines
Sat 29/1115:30PHL - LHR
1 stop10h 40mUnited Airlines
Deal found 7/7£469
Thu 11/911:55LHR - PHL
2 stops14h 29mIcelandair
Wed 24/915:10PHL - LHR
1 stop10h 20mIcelandair
Deal found 8/7£469
Thu 27/1108:30LHR - PHL
1 stop12h 35mMultiple Airlines
Thu 4/1215:30PHL - LHR
1 stop10h 40mMultiple Airlines
Deal found 7/7£472
Fri 28/1106:50LHR - PHL
2 stops12h 57mBrussels Airlines
Fri 5/1215:30PHL - LHR
2 stops24h 05mBrussels Airlines
Deal found 6/7£480
Mon 18/809:40LHR - PHL
1 stop16h 44mKLM
Mon 25/813:00PHL - LHR
1 stop14h 55mKLM
Deal found 6/7£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 8 July 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 11/9

08:25-17:45

1 stop14h 20m

Philadelphia

Thu 18/9

15:10-06:30

1 stop10h 20m

£452

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Mon 25/8

10:00-00:49

1 stop19h 49m

Philadelphia

Mon 1/9

17:43-07:00

1 stop32h 17m

£453

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 27/11

06:30-16:05

1 stop14h 35m

Philadelphia

Thu 4/12

15:30-07:10

1 stop10h 40m

£457

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Wed 3/9

12:10-21:24

1 stop14h 14m

Philadelphia

Sun 7/9

18:40-09:35

1 stop9h 55m

£460

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 1/9

09:30-22:07

1 stop17h 37m

Philadelphia

Tue 9/9

15:25-06:30

1 stop10h 05m

£463

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 17/11

07:50-13:55

1 stop11h 05m

Philadelphia

Mon 1/12

15:35-07:00

1 stop10h 25m

£464

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 5/8

17:00-14:05

1 stop26h 05m

Philadelphia

Tue 12/8

17:29-12:15

2 stops13h 46m

£465

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 30/8

09:30-14:37

2 stops34h 07m

Philadelphia

Sat 29/11

15:30-07:10

1 stop10h 40m

£469

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 11/9

11:55-21:24

2 stops14h 29m

Philadelphia

Wed 24/9

15:10-06:30

1 stop10h 20m

£469

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 27/11

08:30-16:05

1 stop12h 35m

Philadelphia

Thu 4/12

15:30-07:10

1 stop10h 40m

£472

Flights are sorted by cheapest return flights first.

Deals found on 5/7

Showing 1-10 of 38 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.

Reviews of airlines servicing Delaware

Get insights into the airlines that provide service to Delaware. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Delaware. Reviews last updated 8 July 2025.
Check out reviews from past customers who have flown with Delta, KLM, andFinnair from London to Delaware to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very Good

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.
  • 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 £407. Users have also found prices from £484 and £496 on JetBlue and TAP AIR PORTUGAL, respectively.

  • What are the most popular routes from London to Delaware?

  • 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.

Fly with Cheapflights

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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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