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.

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.

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).

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 38% 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 £513. For sooner than that we have options available in the next 3 days from £756.

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 £385.

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.

£376+ Flights from London to Delaware

Cheap flight deals from London to Delaware

Round-trip from	£452
One-way from	£376
Popular in	August
Cheapest in	February
Average price	£623

JetBlue
11/9-18/9
2 total stops
24h 40m total
London to Delaware

Search Deals

26/8
3 total stops
43h 09m total
London to Delaware

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£42 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 July 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 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

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 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

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

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

Mon 25/812:00LGW - PHL

2 stops34h 50mDelta

Mon 1/918:45PHL - LGW

2 stops34h 15mDelta

Deal found 7/7£496

Thu 27/1110:40LGW - PHL

2 stops18h 19mTAP AIR PORTUGAL

Thu 4/1217:32PHL - LGW

3 stops22h 08mTAP AIR PORTUGAL

Deal found 7/7£524

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 8 July 2025.

Mon 18/813:30LHR - PHL

Nonstop7h 55mBritish Airways

Wed 10/918:30PHL - LHR

Nonstop7h 10mBritish Airways

Deal found 7/7£487

Mon 1/910:05LHR - PHL

Nonstop8h 05mFinnair

Tue 9/922:15PHL - LHR

Nonstop7h 05mFinnair

Deal found 7/7£489

Wed 6/810:05LHR - PHL

Nonstop8h 05mMultiple Airlines

Mon 11/822:15PHL - LHR

Nonstop7h 05mMultiple Airlines

Deal found 7/7£503

Wed 20/810:05LHR - PHL

Nonstop8h 05mIberia

Wed 27/819:40PHL - LHR

Nonstop7h 15mIberia

Deal found 6/7£504

Last-minute flights from London to Delaware
Discover last-minute flight deals from London to Delaware. Data last updated 8 July 2025 and is based on user searches.

Sat 12/720:10LHR - PHL

1 stop20h 35mAer Lingus

Thu 24/718:45PHL - LHR

1 stop32h 15mAer Lingus

Deal found 7/7£697

Sun 13/709:30LHR - PHL

1 stop10h 03mAir Canada

Tue 29/710:40PHL - LHR

2 stops14h 50mAir Canada

Deal found 7/7£703

Sun 13/708:25LHR - PHL

1 stop12h 45mAmerican Airlines

Wed 24/1219:45PHL - LHR

Nonstop7h 05mAmerican Airlines

Deal found 6/7£741

Sun 13/717:50LCY - PHL

1 stop28h 20mLufthansa

Tue 29/717:35PHL - LCY

1 stop17h 50mLufthansa

Deal found 6/7£748

Mon 14/706:30LHR - PHL

2 stops15h 17mDelta

Sun 20/717:22PHL - LHR

2 stops12h 23mDelta

Deal found 6/7£571

Tue 15/717:20LHR - PHL

1 stop28h 25mFinnair

Tue 29/718:35PHL - LHR

1 stop12h 55mFinnair

Deal found 6/7£491

Tue 15/712:30LHR - PHL

Nonstop7h 55mBritish Airways

Tue 5/816:02PHL - LHR

1 stop10h 48mBritish Airways

Deal found 7/7£509

Tue 15/707:25LHR - PHL

2 stops20h 49mUnited Airlines

Tue 5/815:05PHL - LHR

1 stop14h 35mUnited Airlines

Deal found 7/7£510

Tue 15/719:30LHR - PHL

1 stop26h 40mMultiple Airlines

Tue 5/809:20PHL - LHR

1 stop19h 40mMultiple Airlines

Deal found 7/7£518

Tue 15/718:00LHR - PHL

2 stops25h 29mLufthansa

Tue 29/715:05PHL - LHR

2 stops13h 15mLufthansa

Deal found 7/7£524

Tue 15/707:45LCY - PHL

1 stop11h 05mBritish Airways

Tue 5/821:10PHL - LCY

1 stop11h 15mBritish Airways

Deal found 7/7£601

Tue 15/721:35LGW - PHL

3 stops29h 32mMultiple Airlines

Tue 5/806:13PHL - LGW

1 stop22h 47mMultiple Airlines

Deal found 7/7£714

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 8 July 2025.

Tue 26/817:20LHR - PHL

3 stops43h 09mMultiple Airlines

Deal found 7/7£376

Wed 20/819:00LTN - PHL

2 stops43h 46mMultiple Airlines

Deal found 6/7£378

Tue 26/822:05STN - PHL

3 stops40h 35mMultiple Airlines

Deal found 7/7£379

Fri 26/911:35LGW - PHL

2 stops15h 54mMultiple Airlines

Deal found 6/7£383

Wed 20/808:50LHR - PHL

1 stop15h 10mAer Lingus

Deal found 7/7£407

Fri 22/811:05SEN - PHL

3 stops41h 54mMultiple Airlines

Deal found 6/7£437

Mon 22/912:10LGW - PHL

1 stop14h 14mJetBlue

Deal found 7/7£484

Fri 29/809:20LCY - PHL

3 stops29h 20mMultiple Airlines

Deal found 7/7£491

Wed 24/912:05LGW - PHL

2 stops38h 19mTAP AIR PORTUGAL

Deal found 7/7£496

Mon 22/918:35LGW - PHL

2 stops26h 25mSWISS

Deal found 7/7£504

Fri 12/908:55LCY - PHL

1 stop12h 05mLufthansa

Deal found 7/7£510

Mon 22/918:05LCY - PHL

2 stops26h 55mSWISS

Deal found 6/7£513

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

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

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

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.

Delta

8.0

Very Good

7,963 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

7,963 reviews

Delta

8.0

Very Good

7,963 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

1,368 reviews

Delta

8.0

Very Good

7,963 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

1,312 reviews

Delta

8.0

Very Good

7,963 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

1,650 reviews

Delta

8.0

Very Good

7,963 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!

United Airlines

7.4

Good

8,844 reviews

Delta

8.0

Very Good

7,963 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 £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?
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

Gatwick to John F Kennedy Intl flights

Gatwick to Newark flights

London City 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 Miami flights

Luton to John F Kennedy Intl flights

Manchester to John F Kennedy Intl flights

Heathrow to San Francisco flights

Heathrow to O'Hare Intl flights

Heathrow to Las Vegas flights

Heathrow to Boston flights

Manchester to Orlando flights

Heathrow to Dulles Intl flights

Gatwick to Orlando flights

Gatwick to Boston flights

Stansted to Newark flights

Heathrow to Dallas/Fort Worth flights

London City to Los Angeles flights

Manchester to Newark flights

Heathrow to Seattle flights

Gatwick to Los Angeles flights

Manchester to LaGuardia flights

Gatwick to Stewart flights

Luton to Newark flights

London City to Orlando flights

Luton to Stewart flights

London City to Miami flights

Heathrow to Atlanta flights

Gatwick to Miami flights

Heathrow to Tampa flights

Heathrow to Baltimore flights

Edinburgh to Newark flights

London City to Boston flights

Heathrow to Hobby flights

Gatwick to Las Vegas flights

London City to LaGuardia flights

Gatwick to San Francisco flights

Edinburgh to John F Kennedy Intl flights

Heathrow to Denver flights

Gatwick to O'Hare Intl flights

Luton to Los Angeles flights

London City to San Francisco flights

Heathrow to Philadelphia 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 £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.

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

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 8 July 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 8 July 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

Reviews of airlines servicing Delaware

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.

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 8 July 2025.