What is the cheapest airline that flies from London to Delaware?

JetBlue, British Airways, and United Airlines are the most popular carriers operating from London to Delaware

How many flights depart from London to Delaware on average per week?

The number of flights available between London and Delaware is 97 per week as of July 2026. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.

When did momondo last update prices for flights from London to Delaware?

Prices for flights from London to Delaware are refreshed on a daily basis.

How many operators does momondo search for flights from London to Delaware?

As of July 2026, there are 9 operators available to choose from for flights from London to Delaware.

How old do you have to be to fly from London to Delaware?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Delaware.

What documentation or ID do you need to fly to Delaware?

The required travel and health documents for your Delaware trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Delaware. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

£341 Cheap Flights from London to Delaware in 2026

Voted winner of Europe's Best Travel App 2023

Find the cheapest flights from London to Delaware

Return

One-way

Last minute

Direct

Cheap return flights

Enter your travel dates to find the best prices.

12:20 - 20:01

LGW

PHL

12h 41m

1 stop

09:12 - 09:35

PHL

LGW

19h 23m

1 stop

£605JetBlue

Thu, 27 Aug - Mon, 31 Aug

09:30 - 22:46

LHR

PHL

18h 16m

2 stops

15:25 - 06:30

PHL

LHR

10h 05m

1 stop

£607Air Canada

Mon, 14 Sep - Wed, 30 Sep

09:00 - 22:56

LHR

PHL

18h 56m

2 stops

15:20 - 07:10

PHL

LHR

10h 50m

1 stop

£608Air Canada

Wed, 11 Nov - Wed, 18 Nov

08:55 - 17:40

LGW

PHL

13h 45m

1 stop

17:57 - 06:00

PHL

LGW

31h 03m

1 stop

£608Multiple Airlines

Mon, 2 Nov - Mon, 16 Nov

09:30 - 22:46

LHR

PHL

18h 16m

2 stops

10:05 - 10:00

PHL

LHR

18h 55m

1 stop

£609Air Canada

Wed, 7 Oct - Wed, 21 Oct

08:55 - 17:40

LGW

PHL

13h 45m

1 stop

17:57 - 06:00

PHL

LGW

31h 03m

1 stop

£609Multiple Airlines

Mon, 2 Nov - Mon, 16 Nov

07:30 - 16:05

LHR

PHL

13h 35m

1 stop

09:15 - 06:30

PHL

LHR

16h 15m

2 stops

£611United Airlines

Thu, 26 Nov - Mon, 30 Nov

13:45 - 16:40

LHR

PHL

7h 55mdirect

21:55 - 06:15

PHL

LHR

27h 20m

1 stop

£613Finnair

Thu, 1 Oct - Sun, 11 Oct

15:30 - 16:05

LHR

PHL

29h 35m

1 stop

10:30 - 09:10

PHL

LHR

18h 40m

2 stops

£614United Airlines

Tue, 13 Oct - Wed, 28 Oct

06:40 - 01:19

LHR

PHL

23h 39m

2 stops

09:30 - 18:30

PHL

LHR

28h 00m

2 stops

£614Scandinavian Airlines

Thu, 27 Aug - Thu, 3 Sep

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United Airlines flights from London to Delaware

Our best United Airlines deals on London to Delaware flight tickets

United Airlines

26 Nov

LHR07:30London Heathrow

13h 35m

1 stop

PHL16:05Philadelphia

30 Nov

PHL09:15Philadelphia

16h 15m

2 stops

LHR06:30London Heathrow

£611

United Airlines

13 Oct

LHR15:30London Heathrow

29h 35m

1 stop

PHL16:05Philadelphia

28 Oct

PHL10:30Philadelphia

18h 40m

2 stops

LHR09:10London Heathrow

£614

United Airlines

20 Sept

LHR07:30London Heathrow

18h 57m

2 stops

PHL21:27Philadelphia

30 Sept

PHL10:50Philadelphia

29h 10m

2 stops

LHR21:00London Heathrow

£616

Finnair flights from London to Delaware

Our best Finnair deals on London to Delaware flight tickets

Finnair

1 Oct

LHR13:45London Heathrow

7h 55m

PHL16:40Philadelphia

11 Oct

PHL21:55Philadelphia

27h 20m

1 stop

LHR06:15London Heathrow

£613

Finnair

7 Sept

LHR12:30London Heathrow

8h 05m

PHL15:35Philadelphia

14 Sept

PHL19:35Philadelphia

7h 15m

LHR07:50London Heathrow

£618

Finnair

30 Sept

LHR13:00London Heathrow

8h 00m

PHL16:00Philadelphia

28 Oct

PHL19:35Philadelphia

7h 00m

LHR06:35London Heathrow

£626

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Thu 27/8

12:20-20:01

1 stop12h 41m

Philadelphia

Mon 31/8

09:12-09:35

1 stop19h 23m

£605

Fastest return journey

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 14/9

09:30-22:46

2 stops18h 16m

Philadelphia

Wed 30/9

15:25-06:30

1 stop10h 05m

£607

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 11/11

09:00-22:56

2 stops18h 56m

Philadelphia

Wed 18/11

15:20-07:10

1 stop10h 50m

£608

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Mon 2/11

08:55-17:40

1 stop13h 45m

Philadelphia

Mon 16/11

17:57-06:00

1 stop31h 03m

£608

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 7/10

09:30-22:46

2 stops18h 16m

Philadelphia

Wed 21/10

10:05-10:00

1 stop18h 55m

£609

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Mon 2/11

08:55-17:40

1 stop13h 45m

Philadelphia

Mon 16/11

17:57-06:00

1 stop31h 03m

£609

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 26/11

07:30-16:05

1 stop13h 35m

Philadelphia

Mon 30/11

09:15-06:30

2 stops16h 15m

£611

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 1/10

13:45-16:40

Nonstop7h 55m

Philadelphia

Sun 11/10

21:55-06:15

1 stop27h 20m

£613

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 13/10

15:30-16:05

1 stop29h 35m

Philadelphia

Wed 28/10

10:30-09:10

2 stops18h 40m

£614

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 27/8

06:40-01:19

2 stops23h 39m

Philadelphia

Thu 3/9

09:30-18:30

2 stops28h 00m

£614

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London to Delaware

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest day to depart on your flight to Delaware?

On average, the least expensive day to fly to Delaware from London is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as £618. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London to Delaware for around £691.

What is the cheapest time of day to depart on your flight to Delaware?

Our most recent data shows that the best time of day to fly to Delaware is in the morning. Flights from London to Delaware during this time can be as low as £650. In contrast, the most expensive time of day to depart to Delaware is at midday when prices are around £663.

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

You are more likely to see cheaper flights to Delaware from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Delaware for around £637 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Delaware from London for as low as £580 on momondo.

Cheap London to Delaware flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Delaware

Fastest flight time	7h 55m
Direct flights	Every day
Airports in Delaware	17 airports

The fastest flight from London to Delaware takes 7h 55m

Direct flights go from London to Delaware every day.

There are 17 airports in Delaware. From London there are direct flights to Philadelphia (PHL).

Search flight deals

Frequently asked questions about flying from London to Delaware

When did momondo last update prices for flights from London to Delaware?
Prices for flights from London to Delaware are refreshed on a daily basis.
How many operators does momondo search for flights from London to Delaware?
As of July 2026, there are 9 operators available to choose from for flights from London to Delaware.
How old do you have to be to fly from London to Delaware?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Delaware.
What documentation or ID do you need to fly to Delaware?
The required travel and health documents for your Delaware trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Delaware. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from London to Delaware?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Delaware from London.

Can I find flights from London to Delaware with flexible booking policies on momondo?

All flight searches from London to Delaware on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from London to Delaware?

Once you have performed a search for London to Delaware flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from London to Delaware right now. Can momondo alert me if prices change?

Price alerts on flights to Delaware from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.