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 £427. Users have also found prices from £461 and £490 on Lufthansa and British Airways, 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 56 days in advance, which can save you up to 35% on flights from London to Delaware compared to booking the week you need them. Waiting 56 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 £549. For sooner than that we have options available in the next 3 days from £760.

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 £392.

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.

£411+ Flights from London to Delaware - Compare & Save Big

Cheap flight deals from London to Delaware

Round-trip from	£411
Popular in	August
Cheapest in	February
Average price	£561

JetBlue
10/9-25/9
2 total stops
25h 07m total
London to Delaware

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (£47 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 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 29 April 2025.

Mon 8/912:10LGW - PHL

1 stop15h 12mJetBlue

Wed 24/915:00PHL - LGW

1 stop13h 35mJetBlue

Deal found 28/4£411

Sat 7/610:00LGW - PHL

1 stop17h 17mMultiple Airlines

Thu 17/717:36PHL - LGW

1 stop32h 19mMultiple Airlines

Deal found 28/4£418

Tue 9/908:25LHR - PHL

1 stop15h 17mJetBlue

Mon 22/910:20PHL - LHR

1 stop15h 10mJetBlue

Deal found 28/4£442

Mon 5/508:40LHR - PHL

2 stops17h 43mSWISS

Mon 12/517:35PHL - LHR

2 stops12h 50mSWISS

Deal found 27/4£452

Mon 5/507:25LHR - PHL

2 stops37h 23mUnited Airlines

Tue 13/509:45PHL - LHR

1 stop19h 15mUnited Airlines

Deal found 28/4£461

Mon 5/512:30LHR - PHL

Nonstop7h 45mAmerican Airlines

Mon 12/514:00PHL - LHR

1 stop11h 15mAmerican Airlines

Deal found 28/4£463

Thu 8/509:30LHR - PHL

1 stop17h 36mLufthansa

Sun 18/510:44PHL - LHR

1 stop15h 11mLufthansa

Deal found 27/4£466

Tue 8/707:50LHR - PHL

1 stop13h 55mFinnair

Tue 15/713:55PHL - LHR

1 stop11h 20mFinnair

Deal found 28/4£469

Tue 9/906:50LHR - PHL

2 stops20h 18mAir Canada

Sun 28/910:35PHL - LHR

1 stop17h 00mAir Canada

Deal found 28/4£472

Thu 8/515:50LHR - PHL

1 stop11h 38mMultiple Airlines

Fri 16/509:45PHL - LHR

2 stops30h 15mMultiple Airlines

Deal found 27/4£474

Wed 7/513:25LHR - PHL

1 stop10h 35mBritish Airways

Wed 14/519:30PHL - LHR

Nonstop7h 25mBritish Airways

Deal found 28/4£478

Wed 10/918:35LGW - PHL

2 stops51h 46mSWISS

Thu 25/917:35PHL - LGW

2 stops43h 15mSWISS

Deal found 28/4£486

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 29 April 2025.

Wed 10/912:10LGW - PHL

1 stop11h 32mJetBlue

Thu 25/915:00PHL - LGW

1 stop13h 35mJetBlue

Deal found 28/4£411

Sat 7/610:00LGW - PHL

1 stop17h 17mMultiple Airlines

Thu 17/717:36PHL - LGW

1 stop32h 19mMultiple Airlines

Deal found 28/4£418

Mon 16/612:10LGW - PHL

1 stop26h 28mIcelandair

Mon 23/610:15PHL - LGW

1 stop18h 20mIcelandair

Deal found 27/4£450

Thu 8/509:30LHR - PHL

1 stop17h 36mLufthansa

Sun 18/510:44PHL - LHR

1 stop15h 11mLufthansa

Deal found 27/4£466

Sun 11/508:30LHR - PHL

1 stop12h 30mUnited Airlines

Sun 18/509:45PHL - LHR

1 stop19h 15mUnited Airlines

Deal found 27/4£466

Tue 8/707:50LHR - PHL

1 stop13h 55mFinnair

Tue 15/713:55PHL - LHR

1 stop11h 20mFinnair

Deal found 28/4£469

Thu 15/506:50LHR - PHL

2 stops12h 46mAir Canada

Sat 24/515:20PHL - LHR

1 stop10h 10mAir Canada

Deal found 28/4£473

Wed 10/918:35LGW - PHL

2 stops51h 46mSWISS

Thu 25/917:35PHL - LGW

2 stops43h 15mSWISS

Deal found 28/4£486

Wed 4/612:30LHR - PHL

Nonstop7h 45mAmerican Airlines

Wed 11/613:55PHL - LHR

1 stop11h 20mAmerican Airlines

Deal found 28/4£487

Mon 16/613:25LHR - PHL

1 stop10h 35mBritish Airways

Mon 30/617:31PHL - LHR

1 stop9h 19mBritish Airways

Deal found 27/4£488

Wed 4/613:30LHR - PHL

Nonstop7h 55mIberia

Wed 25/619:35PHL - LHR

Nonstop7h 20mIberia

Deal found 28/4£531

Wed 4/606:00LHR - PHL

2 stops21h 28mAustrian Airlines

Mon 16/617:35PHL - LHR

2 stops33h 45mAustrian Airlines

Deal found 27/4£566

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 29 April 2025.

Mon 8/912:30LHR - PHL

Nonstop7h 55mBritish Airways

Thu 25/922:20PHL - LHR

Nonstop7h 00mBritish Airways

Deal found 28/4£474

Wed 10/910:05LHR - PHL

Nonstop7h 55mAmerican Airlines

Thu 25/919:50PHL - LHR

Nonstop7h 15mAmerican Airlines

Deal found 28/4£495

Wed 4/610:05LHR - PHL

Nonstop7h 45mMultiple Airlines

Wed 11/622:15PHL - LHR

Nonstop7h 05mMultiple Airlines

Deal found 28/4£514

Tue 9/910:05LHR - PHL

Nonstop7h 55mFinnair

Wed 24/922:20PHL - LHR

Nonstop7h 00mFinnair

Deal found 28/4£526

Wed 4/613:30LHR - PHL

Nonstop7h 55mIberia

Wed 25/619:35PHL - LHR

Nonstop7h 20mIberia

Deal found 28/4£531

Mon 8/913:30LHR - PHL

Nonstop7h 55mAer Lingus

Mon 22/918:30PHL - LHR

Nonstop7h 10mAer Lingus

Deal found 28/4£719

Last-minute flights from London to Delaware
Discover last-minute flight deals from London to Delaware. Data last updated 29 April 2025 and is based on user searches.

Wed 30/414:00LGW - PHL

1 stop23h 10mMultiple Airlines

Wed 7/519:12PHL - LGW

1 stop33h 48mMultiple Airlines

Deal found 27/4£481

Thu 1/518:55STN - PHL

3 stops32h 33mMultiple Airlines

Fri 9/517:35PHL - STN

2 stops18h 40mMultiple Airlines

Deal found 27/4£498

Mon 5/508:40LHR - PHL

2 stops17h 43mSWISS

Mon 12/517:35PHL - LHR

2 stops12h 50mSWISS

Deal found 27/4£452

Mon 5/507:25LHR - PHL

2 stops37h 23mUnited Airlines

Tue 13/506:30PHL - LHR

1 stop18h 50mUnited Airlines

Deal found 28/4£461

Mon 5/512:30LHR - PHL

Nonstop7h 45mAmerican Airlines

Mon 12/514:00PHL - LHR

1 stop11h 15mAmerican Airlines

Deal found 28/4£463

Mon 5/506:50LHR - PHL

2 stops12h 46mMultiple Airlines

Tue 13/509:45PHL - LHR

2 stops18h 50mMultiple Airlines

Deal found 28/4£466

Mon 5/509:30LHR - PHL

1 stop10h 06mAir Canada

Tue 13/509:45PHL - LHR

1 stop15h 45mAir Canada

Deal found 28/4£471

Mon 5/512:30LHR - PHL

Nonstop7h 45mFinnair

Tue 13/519:55PHL - LHR

Nonstop7h 10mFinnair

Deal found 28/4£495

Mon 5/508:40LHR - PHL

2 stops17h 29mDelta

Tue 13/513:00PHL - LHR

2 stops14h 50mDelta

Deal found 28/4£496

Mon 5/506:25STN - PHL

3 stops20h 41mMultiple Airlines

Mon 12/516:50PHL - STN

3 stops25h 20mMultiple Airlines

Deal found 28/4£498

Tue 6/517:10LHR - PHL

2 stops31h 04mVirgin Atlantic

Wed 18/610:43PHL - LHR

1 stop15h 02mVirgin Atlantic

Deal found 28/4£491

Wed 7/513:25LHR - PHL

1 stop10h 35mBritish Airways

Wed 14/518:00PHL - LHR

1 stop8h 50mBritish Airways

Deal found 28/4£475

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 29 April 2025.

Sat 9/821:50LHR - PHL

3 stops42h 44mMultiple Airlines

Deal found 27/4£421

Wed 9/708:40LCY - PHL

3 stops28h 22mMultiple Airlines

Deal found 28/4£422

Mon 9/608:50LTN - PHL

2 stops18h 38mMultiple Airlines

Deal found 28/4£426

Fri 29/813:25LHR - PHL

1 stop10h 35mAer Lingus

Deal found 28/4£427

Mon 9/606:00LGW - PHL

3 stops21h 28mMultiple Airlines

Deal found 27/4£427

Thu 22/517:15STN - PHL

2 stops36h 38mMultiple Airlines

Deal found 28/4£430

Fri 5/908:55LCY - PHL

1 stop12h 05mLufthansa

Deal found 27/4£461

Mon 9/619:30LHR - PHL

1 stop25h 30mLufthansa

Deal found 28/4£483

Mon 9/612:30LHR - PHL

Nonstop7h 55mBritish Airways

Deal found 28/4£490

Mon 9/608:40LCY - PHL

1 stop10h 10mBritish Airways

Deal found 28/4£496

Fri 9/514:10LHR - PHL

3 stops25h 26mWestJet

Deal found 27/4£498

Mon 12/512:30LHR - PHL

Nonstop7h 45mFinnair

Deal found 27/4£505

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

LGW - PHL

LGWPHL

London Gatwick

Mon 8/9

12:10-22:22

1 stop15h 12m

Philadelphia

Wed 24/9

15:00-09:35

1 stop13h 35m

£411

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Sat 7/6

10:00-22:17

1 stop17h 17m

Philadelphia

Thu 17/7

17:36-06:55

1 stop32h 19m

£418

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 9/9

08:25-18:42

1 stop15h 17m

Philadelphia

Wed 24/9

10:20-06:30

1 stop15h 10m

£442

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 13/5

09:30-16:00

1 stop11h 30m

Philadelphia

Fri 23/5

09:45-06:30

1 stop15h 45m

£452

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 8/5

09:30-22:06

1 stop17h 36m

Philadelphia

Sun 18/5

10:44-06:55

1 stop15h 11m

£466

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 11/9

07:30-16:00

1 stop13h 30m

Philadelphia

Mon 22/9

19:58-10:40

1 stop9h 42m

£466

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 8/7

07:50-16:45

1 stop13h 55m

Philadelphia

Tue 15/7

13:55-06:15

1 stop11h 20m

£469

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 9/9

06:50-22:08

2 stops20h 18m

Philadelphia

Sat 27/9

10:35-11:50

1 stop20h 15m

£472

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Wed 10/9

18:35-17:21

2 stops51h 46m

Philadelphia

Thu 25/9

17:35-17:50

2 stops43h 15m

£486

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 16/6

13:25-19:00

1 stop10h 35m

Philadelphia

Mon 30/6

17:31-07:50

1 stop9h 19m

£488

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 60 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 Finnair 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

7,929 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very Good

7,929 reviews

Delta

8.0

Very Good

7,929 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,333 reviews

Delta

8.0

Very Good

7,929 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,273 reviews

Delta

8.0

Very Good

7,929 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines

7.6

Good

780 reviews

Delta

8.0

Very Good

7,929 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS

7.5

Good

1,587 reviews

Delta

8.0

Very Good

7,929 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 £427. Users have also found prices from £461 and £490 on Lufthansa and British Airways, 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

Gatwick to John F Kennedy Intl flights

Heathrow to LaGuardia flights

London City to John F Kennedy Intl flights

Gatwick to Newark flights

London City to Newark flights

Gatwick to LaGuardia flights

Heathrow to Los Angeles flights

Heathrow to Orlando flights

Heathrow to Miami flights

Heathrow to Dallas/Fort Worth flights

Heathrow to O'Hare Intl flights

Stansted to Stewart flights

Heathrow to Hobby flights

Stansted to John F Kennedy Intl flights

Heathrow to Boston flights

Heathrow to Dulles Intl flights

Manchester to John F Kennedy Intl flights

Luton to John F Kennedy Intl flights

Manchester to Orlando flights

Heathrow to Las Vegas flights

Heathrow to Seattle flights

Heathrow to San Francisco flights

Gatwick to Orlando flights

Heathrow to Baltimore flights

Heathrow to George Bush Intcntl flights

Manchester to Newark flights

Gatwick to Boston flights

London City to Los Angeles flights

Manchester to LaGuardia flights

Edinburgh to John F Kennedy Intl flights

Heathrow to Atlanta flights

Heathrow to Nashville flights

Heathrow to Denver flights

Edinburgh to Newark flights

Heathrow to Tampa flights

London City to Orlando flights

Heathrow to Raleigh flights

Heathrow to Detroit flights

Heathrow to Charlotte flights

London City to Miami flights

Gatwick to Los Angeles flights

Stansted to Newark flights

Gatwick to Miami flights

Gatwick to Dulles Intl flights

Luton to Newark flights

Gatwick to Las Vegas flights

London City to Dulles Intl flights

London City to O'Hare Intl 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from London to Delaware from £411

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/9. 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 29 April 2025.

Round-trip 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 29 April 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 29 April 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 Finnair 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 29 April 2025.