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 £386. Users have also found prices from £464 and £476 on British Airways and Iberia, 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.

How far in advance should I book a flight from London to Delaware?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 17 days in advance, which can save you up to 42% on flights from London to Delaware compared to booking the week you need them. Waiting 17 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £514. For sooner than that we have options available in the next 3 days from £758.

What is the cheapest month to fly from London to Delaware?

Flights from London to Delaware lean towards being more expensive in August. Prices are generally better when you fly from London to Delaware in February, with the cheapest ticket starting at £386.

What is the cheapest time of day to fly from LON to DE?

When flying from London to Delaware, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

£386+ Flights from London to Delaware

Cheap flight deals from London to Delaware

Round-trip from	£450
One-way from	£386
Popular in	August
Cheapest in	February
Average price	£559

Finnair
29/8-11/9
1 total stop
18h 20m total
London to Delaware

Search Deals

Aer Lingus
24/9
1 total stop
14h 10m total
London to Delaware

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£44 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 June 2025

Search Deals

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 13 June 2025.

Sat 30/806:50LHR - PHL

2 stops12h 47mMultiple Airlines

Sun 7/910:35PHL - LHR

2 stops14h 55mMultiple Airlines

Deal found 13/6£450

Thu 11/908:25LHR - PHL

1 stop14h 20mJetBlue

Thu 18/910:20PHL - LHR

1 stop15h 10mJetBlue

Deal found 13/6£452

Thu 3/710:00LGW - PHL

1 stop32h 40mMultiple Airlines

Mon 14/711:16PHL - LGW

1 stop14h 39mMultiple Airlines

Deal found 11/6£452

Mon 1/907:10LHR - PHL

1 stop11h 55mBritish Airways

Tue 30/915:59PHL - LHR

1 stop10h 21mBritish Airways

Deal found 11/6£453

Wed 12/1106:50LCY - PHL

1 stop12h 05mBritish Airways

Wed 19/1121:10PHL - LCY

1 stop19h 30mBritish Airways

Deal found 11/6£454

Thu 11/910:40LGW - PHL

1 stop31h 07mFinnair

Thu 18/911:44PHL - LGW

2 stops15h 26mFinnair

Deal found 11/6£461

Thu 27/1106:50LHR - PHL

2 stops13h 00mAir Canada

Thu 4/1215:30PHL - LHR

1 stop10h 40mAir Canada

Deal found 12/6£464

Mon 1/920:25LHR - PHL

2 stops24h 35mLufthansa

Sun 14/917:35PHL - LHR

1 stop11h 05mLufthansa

Deal found 13/6£468

Mon 23/611:45LHR - PHL

1 stop12h 50mVirgin Atlantic

Mon 30/618:33PHL - LHR

1 stop13h 57mVirgin Atlantic

Deal found 13/6£475

Thu 27/1113:10LHR - PHL

Nonstop8h 10mFinnair

Thu 4/1219:45PHL - LHR

Nonstop7h 05mFinnair

Deal found 12/6£477

Wed 12/1109:25LCY - PHL

2 stops34h 25mMultiple Airlines

Wed 19/1115:30PHL - LCY

2 stops36h 15mMultiple Airlines

Deal found 11/6£478

Thu 27/1107:25LHR - PHL

1 stop13h 10mAmerican Airlines

Thu 4/1219:45PHL - LHR

Nonstop7h 05mAmerican Airlines

Deal found 12/6£478

Best flights from London to Delaware
Discover carefully curated flight deals from London to Delaware that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 June 2025.

Fri 29/807:55LHR - PHL

1 stop11h 10mFinnair

Thu 11/918:30PHL - LHR

Nonstop7h 10mFinnair

Deal found 10/6£450

Thu 3/710:00LGW - PHL

1 stop32h 40mMultiple Airlines

Mon 14/711:16PHL - LGW

1 stop14h 39mMultiple Airlines

Deal found 11/6£452

Sun 24/820:15LHR - PHL

1 stop25h 00mBritish Airways

Tue 23/917:14PHL - LHR

1 stop9h 36mBritish Airways

Deal found 10/6£453

Wed 3/908:00LHR - PHL

1 stop12h 50mAmerican Airlines

Mon 15/919:50PHL - LHR

Nonstop7h 15mAmerican Airlines

Deal found 10/6£457

Tue 2/908:25LHR - PHL

1 stop14h 25mJetBlue

Sat 20/915:10PHL - LHR

1 stop10h 20mJetBlue

Deal found 10/6£458

Wed 3/908:40LHR - PHL

2 stops17h 51mDelta

Wed 17/913:00PHL - LHR

2 stops13h 15mDelta

Deal found 10/6£464

Mon 23/609:40LHR - PHL

1 stop12h 09mVirgin Atlantic

Mon 30/618:33PHL - LHR

1 stop13h 57mVirgin Atlantic

Deal found 10/6£470

Mon 23/612:30LHR - PHL

Nonstop7h 55mIberia

Mon 30/619:50PHL - LHR

Nonstop7h 15mIberia

Deal found 11/6£473

Mon 1/908:45LCY - PHL

1 stop12h 15mLufthansa

Sun 14/917:35PHL - LCY

1 stop17h 50mLufthansa

Deal found 12/6£486

Sat 5/709:30LHR - PHL

1 stop10h 03mAir Canada

Tue 5/815:20PHL - LHR

1 stop10h 10mAir Canada

Deal found 12/6£510

Tue 8/712:10LGW - PHL

1 stop26h 28mIcelandair

Thu 7/818:35PHL - LGW

1 stop10h 00mIcelandair

Deal found 12/6£511

Mon 23/613:05LHR - PHL

1 stop12h 54mKLM

Mon 30/617:30PHL - LHR

2 stops12h 15mKLM

Deal found 12/6£536

Direct flights from London to Delaware
Explore direct flight options from London to Delaware based on user searches, and compare prices and availability for your desired travel dates. Data last updated 13 June 2025.

Mon 1/912:30LHR - PHL

Nonstop8h 05mBritish Airways

Mon 8/919:50PHL - LHR

Nonstop7h 15mBritish Airways

Deal found 11/6£457

Mon 23/612:30LHR - PHL

Nonstop7h 55mIberia

Mon 30/619:50PHL - LHR

Nonstop7h 15mIberia

Deal found 11/6£473

Thu 27/1113:10LHR - PHL

Nonstop8h 10mFinnair

Thu 4/1219:45PHL - LHR

Nonstop7h 05mFinnair

Deal found 12/6£477

Mon 23/612:30LHR - PHL

Nonstop7h 55mMultiple Airlines

Mon 30/622:15PHL - LHR

Nonstop7h 05mMultiple Airlines

Deal found 13/6£483

Wed 2/712:30LHR - PHL

Nonstop7h 55mAmerican Airlines

Tue 8/722:25PHL - LHR

Nonstop7h 05mAmerican Airlines

Deal found 11/6£486

Last-minute flights from London to Delaware
Discover last-minute flight deals from London to Delaware. Data last updated 13 June 2025 and is based on user searches.

Wed 18/607:40LHR - PHL

1 stop13h 20mBritish Airways

Wed 2/722:15PHL - LHR

Nonstop7h 05mBritish Airways

Deal found 11/6£464

Wed 18/606:30LGW - PHL

1 stop14h 30mBritish Airways

Wed 2/715:56PHL - LGW

1 stop13h 44mBritish Airways

Deal found 11/6£481

Wed 18/607:00LCY - PHL

1 stop11h 50mBritish Airways

Wed 2/721:10PHL - LCY

1 stop11h 15mBritish Airways

Deal found 11/6£515

Sun 22/607:25LHR - PHL

2 stops21h 04mUnited Airlines

Mon 30/612:19PHL - LHR

2 stops13h 56mUnited Airlines

Deal found 11/6£519

Mon 23/614:00LGW - PHL

1 stop22h 48mMultiple Airlines

Mon 7/719:18PHL - LGW

1 stop33h 42mMultiple Airlines

Deal found 12/6£478

Mon 23/610:05LHR - PHL

Nonstop7h 55mIberia

Mon 30/617:31PHL - LHR

1 stop9h 19mIberia

Deal found 11/6£485

Mon 23/612:10LGW - PHL

1 stop26h 28mJetBlue

Mon 30/619:20PHL - LGW

1 stop9h 15mJetBlue

Deal found 12/6£490

Mon 23/606:30LHR - PHL

2 stops15h 48mDelta

Mon 7/710:39PHL - LHR

1 stop15h 06mDelta

Deal found 12/6£491

Mon 23/612:30LHR - PHL

Nonstop7h 55mFinnair

Mon 7/722:25PHL - LHR

Nonstop7h 05mFinnair

Deal found 12/6£495

Mon 23/609:15LHR - PHL

1 stop12h 59mAmerican Airlines

Mon 30/613:48PHL - LHR

1 stop13h 02mAmerican Airlines

Deal found 12/6£497

Mon 23/610:05LHR - PHL

Nonstop7h 55mMultiple Airlines

Mon 30/608:20PHL - LHR

1 stop18h 20mMultiple Airlines

Deal found 11/6£497

Mon 23/611:45LHR - PHL

1 stop12h 50mKLM

Mon 30/618:33PHL - LHR

1 stop13h 57mKLM

Deal found 12/6£517

One-way flights from London to Delaware
Search for one-way flight options from London to Delaware. Find affordable one-way fares based on user searches. Data last updated 13 June 2025.

Wed 24/909:50LHR - PHL

1 stop14h 10mAer Lingus

Deal found 11/6£386

Mon 23/610:00LGW - PHL

2 stops42h 58mMultiple Airlines

Deal found 12/6£389

Mon 8/908:15STN - PHL

1 stop15h 45mMultiple Airlines

Deal found 11/6£395

Wed 18/613:20LTN - PHL

3 stops45h 24mMultiple Airlines

Deal found 12/6£406

Wed 13/813:25LHR - PHL

2 stops26h 18mMultiple Airlines

Deal found 10/6£411

Wed 18/610:05LHR - PHL

Nonstop7h 55mBritish Airways

Deal found 11/6£464

Mon 8/906:45LCY - PHL

1 stop17h 15mMultiple Airlines

Deal found 11/6£475

Wed 18/610:05LHR - PHL

Nonstop7h 55mIberia

Deal found 10/6£476

Mon 8/912:10LGW - PHL

1 stop14h 14mJetBlue

Deal found 12/6£478

Wed 18/606:30LGW - PHL

1 stop14h 30mBritish Airways

Deal found 11/6£481

Wed 18/620:15SEN - PHL

3 stops33h 35mMultiple Airlines

Deal found 11/6£486

Thu 19/609:30LHR - PHL

1 stop11h 30mLufthansa

Deal found 12/6£494

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to Delaware that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 30/8

06:50-14:37

2 stops12h 47m

Philadelphia

Sun 7/9

10:35-06:30

2 stops14h 55m

£450

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 11/9

08:25-17:45

1 stop14h 20m

Philadelphia

Thu 18/9

10:20-06:30

1 stop15h 10m

£452

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Thu 3/7

10:00-13:40

1 stop32h 40m

Philadelphia

Mon 14/7

11:16-06:55

1 stop14h 39m

£452

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 1/9

07:10-14:05

1 stop11h 55m

Philadelphia

Tue 30/9

15:59-07:20

1 stop10h 21m

£453

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Wed 12/11

06:50-13:55

1 stop12h 05m

Philadelphia

Wed 19/11

21:10-21:40

1 stop19h 30m

£454

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Thu 11/9

10:40-12:47

1 stop31h 07m

Philadelphia

Thu 18/9

11:44-08:10

2 stops15h 26m

£461

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 27/11

06:50-14:50

2 stops13h 00m

Philadelphia

Thu 4/12

15:30-07:10

1 stop10h 40m

£464

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 1/9

20:25-16:00

2 stops24h 35m

Philadelphia

Sun 14/9

17:35-09:40

1 stop11h 05m

£468

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 23/6

12:30-15:25

Nonstop7h 55m

Philadelphia

Mon 30/6

19:50-08:05

Nonstop7h 15m

£473

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 23/6

11:45-23:10

1 stop16h 25m

Philadelphia

Mon 30/6

12:09-13:30

1 stop20h 21m

£475

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 56 results

...

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

Rainfall in Delaware by month

In terms of precipitation, rainfall in Delaware ranges from 73.0 - 108.0 inches per month. July is typically the wettest month, when rainfall can reach 108.0 mm. February is typically the driest time to visit Delaware when rainfall is around 73.0 mm.

Temperature in Delaware by month

If weather is an important factor for your trip to Delaware, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 25.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

Reviews of airlines servicing Delaware

See what other customers who have flown with Delta, KLM and Austrian Airlines from London to Delaware have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,950 reviews

Check prices

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!

Delta

8.0

Very Good

7,950 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

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!

KLM

7.8

Good

1,358 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

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!

Austrian Airlines

7.6

Good

802 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

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!

Finnair

7.6

Good

1,290 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

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!

SWISS

7.5

Good

1,624 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

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

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 £386. Users have also found prices from £464 and £476 on British Airways and Iberia, 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for London to Delaware

Heathrow to John F Kennedy Intl flights

Heathrow to Newark flights

Heathrow to LaGuardia flights

London City to John F Kennedy Intl flights

Gatwick to Newark flights

Gatwick to John F Kennedy Intl flights

Gatwick to LaGuardia flights

London City to Newark flights

Heathrow to Los Angeles flights

Stansted to John F Kennedy Intl flights

Heathrow to Orlando flights

Heathrow to Boston flights

Heathrow to Miami flights

Luton to John F Kennedy Intl flights

Heathrow to Seattle flights

Heathrow to O'Hare Intl flights

Heathrow to San Francisco flights

Gatwick to Boston flights

Manchester to John F Kennedy Intl flights

Stansted to Stewart flights

Heathrow to Dulles Intl flights

Heathrow to Dallas/Fort Worth flights

Heathrow to Las Vegas flights

London City to Los Angeles flights

Heathrow to Baltimore flights

Gatwick to Orlando flights

Manchester to Orlando flights

Heathrow to Atlanta flights

Heathrow to Hobby flights

Stansted to Newark flights

London City to Orlando flights

London City to Boston flights

Gatwick to Stewart flights

London City to Miami flights

London City to LaGuardia flights

Gatwick to Miami flights

Manchester to Newark flights

Gatwick to Los Angeles flights

Heathrow to Tampa flights

Gatwick to O'Hare Intl flights

Luton to Newark flights

Luton to Stewart flights

Manchester to LaGuardia flights

London City to O'Hare Intl flights

Heathrow to Raleigh flights

Edinburgh to Newark flights

Heathrow to Ontario flights

Heathrow to George Bush Intcntl flights

Gatwick to San Francisco flights

Heathrow to Santa Ana flights

Direct flights to United States

Fly with Cheapflights

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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Cheap flights from London to Delaware from £386

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 24/9. Fares are subject to change and may not be available on all flights or dates of travel.

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 13 June 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from London to Delaware

Cheapest flights from London to DelawareExplore 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 13 June 2025.

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 13 June 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to Delaware that are best for you.

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.

Cheapflights Insights

Everything you need to know about your flight from London to Delaware

Rainfall in Delaware by month

Plan your trip to Delaware by taking into account the average rainfall totals by month.

Temperature in Delaware by month

Plan your trip to Delaware by taking into account the average temperature totals by month.

Reviews of airlines servicing Delaware

See what other customers who have flown with Delta, KLM and Austrian Airlines from London to Delaware have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

What are the most popular routes from London to Delaware?

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

How can I find direct flights from London to Delaware?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to Delaware

See prices for flight routes from nearby airports that may be better suited for you.

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?

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

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

Can Cheapflights notify me if prices for flights from London to Delaware become cheaper?

100% Free

Book with Flexibility

Travel Smart

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 13 June 2025.