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

British Airways and Lufthansa 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 90 per week as of September 2026. The most frequent departure day is Wed, with 17% 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 September 2026, there are 7 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.

£346 Cheap Flights from London to Delaware in 2026

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.

13:25 - 18:55LHR London Heathrow-PHL Philadelphia

10h 30m1 stop Dublin

18:45 - 06:50PHL Philadelphia-LHR London Heathrow

7h 05mdirect

£584British Airways

Wed, 7 Oct - Wed, 14 Oct

06:00 - 17:05LHR London Heathrow-PHL Philadelphia

15h 05m2 stops Vienna Intl Frankfurt am Main

17:05 - 14:05PHL Philadelphia-LHR London Heathrow

40h 00m2 stops Toronto Pearson Intl Vienna Intl

£584Austrian Airlines

Sun, 25 Oct - Sun, 1 Nov

09:30 - 21:32LHR London Heathrow-PHL Philadelphia

17h 02m1 stop Montreal Pierre Elliott Trudeau Intl

15:20 - 07:10PHL Philadelphia-LHR London Heathrow

10h 50m1 stop Montreal Pierre Elliott Trudeau Intl

£584Multiple Airlines

Sat, 17 Oct - Mon, 2 Nov

07:30 - 16:05LHR London Heathrow-PHL Philadelphia

13h 35m1 stop Frankfurt am Main

18:46 - 05:55PHL Philadelphia-LHR London Heathrow

30h 09m1 stop Chicago O'Hare Intl

£585United Airlines

Thu, 12 Nov - Sun, 15 Nov

07:30 - 16:05LHR London Heathrow-PHL Philadelphia

13h 35m1 stop Frankfurt am Main

16:59 - 05:55PHL Philadelphia-LHR London Heathrow

31h 56m1 stop Chicago O'Hare Intl

£585United Airlines

Sun, 8 Nov - Sun, 15 Nov

08:40 - 09:32LHR London Heathrow-PHL Philadelphia

29h 52m1 stop Boston Logan Intl

17:58 - 06:55PHL Philadelphia-LHR London Heathrow

31h 57m1 stop Boston Logan Intl

£587JetBlue

Thu, 22 Oct - Sun, 8 Nov

08:40 - 09:32LHR London Heathrow-PHL Philadelphia

29h 52m1 stop Boston Logan Intl

10:27 - 06:55PHL Philadelphia-LHR London Heathrow

15h 28m1 stop Boston Logan Intl

£588JetBlue

Sun, 18 Oct - Mon, 2 Nov

06:30 - 14:00LHR London Heathrow-PHL Philadelphia

12h 30m1 stop Dublin

19:40 - 07:50PHL Philadelphia-LHR London Heathrow

7h 10mdirect

£590British Airways

Fri, 6 Nov - Mon, 9 Nov

09:50 - 18:55LHR London Heathrow-PHL Philadelphia

14h 05m1 stop Dublin

20:25 - 12:40PHL Philadelphia-LHR London Heathrow

11h 15m1 stop Dublin

£593Aer Lingus

Thu, 1 Oct - Thu, 15 Oct

12:00 - 18:55LHR London Heathrow-PHL Philadelphia

11h 55m1 stop Dublin

20:25 - 12:40PHL Philadelphia-LHR London Heathrow

11h 15m1 stop Dublin

£597Aer Lingus

Thu, 15 Oct - Fri, 23 Oct

Cheap last-minute flights

Enter your travel dates to find the best prices.

09:15 - 12:10LHR London Heathrow-PHL Philadelphia

7h 55mdirect

18:30 - 10:20PHL Philadelphia-LHR London Heathrow

10h 50m1 stop Dublin

£591British Airways

Wed, 16 Sep - Mon, 21 Sep

07:30 - 16:05LHR London Heathrow-PHL Philadelphia

13h 35m1 stop Frankfurt am Main

15:25 - 10:00PHL Philadelphia-LHR London Heathrow

13h 35m1 stop Montreal Pierre Elliott Trudeau Intl

£594Multiple Airlines

Mon, 14 Sep - Mon, 21 Sep

10:05 - 16:45LHR London Heathrow-PHL Philadelphia

11h 40m1 stop Boston Logan Intl

18:30 - 10:20PHL Philadelphia-LHR London Heathrow

10h 50m1 stop Dublin

£596British Airways

Wed, 16 Sep - Mon, 21 Sep

14:00 - 00:09LGW London Gatwick-PHL Philadelphia

15h 09m1 stop Orlando

05:15 - 10:00PHL Philadelphia-LGW London Gatwick

23h 45m1 stop Orlando

£596Multiple Airlines

Sat, 12 Sep - Sun, 27 Sep

12:20 - 17:45LHR London Heathrow-PHL Philadelphia

34h 25m1 stop Madrid Barajas

18:45 - 06:50PHL Philadelphia-LHR London Heathrow

7h 05mdirect

£603Iberia

Mon, 14 Sep - Mon, 21 Sep

09:15 - 12:10LHR London Heathrow-PHL Philadelphia

7h 55mdirect

22:10 - 10:20PHL Philadelphia-LHR London Heathrow

7h 10mdirect

£613Finnair

Mon, 14 Sep - Mon, 21 Sep

09:30 - 21:32LHR London Heathrow-PHL Philadelphia

17h 02m1 stop Montreal Pierre Elliott Trudeau Intl

06:15 - 06:55PHL Philadelphia-LHR London Heathrow

19h 40m1 stop Washington, D.C. Dulles Intl

£618United Airlines

Tue, 15 Sep - Fri, 25 Sep

14:05 - 21:32LHR London Heathrow-PHL Philadelphia

12h 27m1 stop Montreal Pierre Elliott Trudeau Intl

15:08 - 06:55PHL Philadelphia-LHR London Heathrow

10h 47m1 stop Washington, D.C. Dulles Intl

£618United Airlines

Wed, 16 Sep - Fri, 25 Sep

08:45 - 16:10LHR London Heathrow-PHL Philadelphia

12h 25m1 stop Paris Charles de Gaulle

10:35 - 06:25PHL Philadelphia-LHR London Heathrow

14h 50m2 stops Raleigh-Durham New York John F Kennedy Intl

£622Iberia

Tue, 15 Sep - Wed, 30 Sep

09:15 - 12:10LHR London Heathrow-PHL Philadelphia

7h 55mdirect

22:10 - 10:20PHL Philadelphia-LHR London Heathrow

7h 10mdirect

£633Finnair

Mon, 14 Sep - Mon, 21 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

8 Nov

LHR07:30London Heathrow

13h 35m

1 stop

PHL16:05Philadelphia

15 Nov

PHL16:59Philadelphia

31h 56m

1 stop

LHR05:55London Heathrow

£585

United Airlines

15 Dec

LHR09:30London Heathrow

11h 35m

1 stop

PHL16:05Philadelphia

28 Dec

PHL09:50Philadelphia

17h 05m

1 stop

LHR07:55London Heathrow

£589

United Airlines

15 Nov

LHR16:20London Heathrow

12h 10m

1 stop

PHL23:30Philadelphia

4 Dec

PHL15:05Philadelphia

10h 35m

1 stop

LHR06:40London Heathrow

£590

Lufthansa flights from London to Delaware

Our best Lufthansa deals on London to Delaware flight tickets

Lufthansa

7 Oct

LCY09:15London City

11h 50m

1 stop

PHL16:05Philadelphia

14 Oct

PHL17:40Philadelphia

19h 15m

1 stop

LCY17:55London City

£588

Lufthansa

29 Sept

LHR06:30London Heathrow

14h 35m

1 stop

PHL16:05Philadelphia

7 Oct

PHL17:40Philadelphia

20h 00m

1 stop

LHR18:40London Heathrow

£590

Lufthansa

13 Oct

LCY09:15London City

11h 50m

1 stop

PHL16:05Philadelphia

21 Oct

PHL17:40Philadelphia

19h 15m

1 stop

LCY17:55London City

£593

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Wed 7/10

13:25-18:55

1 stop10h 30m

Philadelphia

Wed 14/10

18:45-06:50

Nonstop7h 05m

£584

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Sun 25/10

06:00-17:05

2 stops15h 05m

Philadelphia

Sun 1/11

17:05-14:05

2 stops40h 00m

£584

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Sat 17/10

09:30-21:32

1 stop17h 02m

Philadelphia

Mon 2/11

15:20-07:10

1 stop10h 50m

£584

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Thu 12/11

07:30-16:05

1 stop13h 35m

Philadelphia

Sun 15/11

18:46-05:55

1 stop30h 09m

£585

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Sun 8/11

07:30-16:05

1 stop13h 35m

Philadelphia

Sun 15/11

16:59-05:55

1 stop31h 56m

£585

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Thu 22/10

08:40-09:32

1 stop29h 52m

Philadelphia

Sun 8/11

17:58-06:55

1 stop31h 57m

£587

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Sun 18/10

08:40-09:32

1 stop29h 52m

Philadelphia

Mon 2/11

10:27-06:55

1 stop15h 28m

£588

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Fri 6/11

06:30-14:00

1 stop12h 30m

Philadelphia

Mon 9/11

19:40-07:50

Nonstop7h 10m

£590

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Thu 1/10

09:50-18:55

1 stop14h 05m

Philadelphia

Thu 15/10

20:25-12:40

1 stop11h 15m

£593

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Thu 15/10

12:00-18:55

1 stop11h 55m

Philadelphia

Fri 23/10

20:25-12:40

1 stop11h 15m

£597

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 £643. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from London to Delaware for around £697.

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 £672. In contrast, the most expensive time of day to depart to Delaware is at midday when prices are around £675.

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 £665 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 £570 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

Best price found	£346
Fastest flight time	7h 55m
Direct flights	Mon, Tue, Wed, Thu, Fri and Sat
Airports in Delaware	17 airports

The best one-way flight to Delaware from London in the past 72 hours is £346. The best return flight deal from London to Delaware found on momondo in the last 72 hours is £584.

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

Direct flights go from London to Delaware on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. There are no airlines offering direct flights..

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 September 2026, there are 7 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.