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

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

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

As of March 2026, 70 flights take off from London Heathrow Airport and land in Delaware each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.

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

Prices for flights from London Heathrow Airport to Delaware are updated daily.

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

There are 9 operators available for flights from London Heathrow Airport to Delaware as of March 2026.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Delaware.

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

The travel and health documents you'll need for your trip to Delaware may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Delaware. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

£320 Cheap Flights from London Heathrow Airport to Delaware in 2026

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Find the cheapest flights from London Heathrow Airport to Delaware

Round-trip

One-way

Last minute

Direct

Cheap return flights

Enter your travel dates to find the best prices.

13:45 - 16:35

LHR

PHL

7h 50mdirect

18:40 - 06:50

PHL

LHR

7h 10mdirect

£482British Airways

Wed, 15 Apr - Sun, 19 Apr

13:45 - 16:40

LHR

PHL

7h 55mdirect

18:45 - 06:50

PHL

LHR

7h 05mdirect

£482British Airways

Wed, 2 Sep - Wed, 16 Sep

13:45 - 16:40

LHR

PHL

7h 55mdirect

18:45 - 06:50

PHL

LHR

7h 05mdirect

£483British Airways

Thu, 3 Sep - Thu, 17 Sep

13:45 - 16:40

LHR

PHL

7h 55mdirect

18:45 - 06:50

PHL

LHR

7h 05mdirect

£484British Airways

Thu, 3 Sep - Sat, 19 Sep

08:40 - 21:59

LHR

PHL

18h 19m

1 stop

06:00 - 06:30

PHL

LHR

19h 30m

1 stop

£496JetBlue

Wed, 22 Apr - Mon, 4 May

13:45 - 16:40

LHR

PHL

7h 55mdirect

18:45 - 06:50

PHL

LHR

7h 05mdirect

£497British Airways

Mon, 1 Jun - Sun, 19 Jul

08:40 - 07:35

LHR

PHL

27h 55m

1 stop

18:33 - 06:30

PHL

LHR

30h 57m

1 stop

£499JetBlue

Tue, 14 Apr - Tue, 5 May

08:40 - 07:35

LHR

PHL

27h 55m

1 stop

18:33 - 06:30

PHL

LHR

30h 57m

1 stop

£500JetBlue

Tue, 21 Apr - Tue, 28 Apr

08:40 - 17:38

LHR

PHL

13h 58m

1 stop

08:25 - 06:30

PHL

LHR

17h 05m

1 stop

£502JetBlue

Tue, 21 Apr - Tue, 28 Apr

08:40 - 22:43

LHR

PHL

19h 03m

2 stops

09:15 - 21:00

PHL

LHR

30h 45m

2 stops

£503Air Canada

Mon, 13 Apr - Mon, 20 Apr

JetBlue flights from London Heathrow Airport to Delaware

Our best JetBlue deals on London Heathrow Airport to Delaware flight tickets

JetBlue

22 Apr

LHR08:40London Heathrow

18h 19m

1 stop

PHL21:59Philadelphia

4 May

PHL06:00Philadelphia

19h 30m

1 stop

LHR06:30London Heathrow

£496

JetBlue

14 Apr

LHR08:40London Heathrow

27h 55m

1 stop

PHL07:35Philadelphia

5 May

PHL18:33Philadelphia

30h 57m

1 stop

LHR06:30London Heathrow

£499

JetBlue

21 Apr

LHR08:40London Heathrow

27h 55m

1 stop

PHL07:35Philadelphia

28 Apr

PHL18:33Philadelphia

30h 57m

1 stop

LHR06:30London Heathrow

£500

United Airlines flights from London Heathrow Airport to Delaware

Our best United Airlines deals on London Heathrow Airport to Delaware flight tickets

United Airlines

1 Jun

LHR16:40London Heathrow

12h 04m

1 stop

PHL23:44Philadelphia

19 Jul

PHL19:45Philadelphia

9h 55m

1 stop

LHR10:40London Heathrow

£504

United Airlines

21 Apr

LHR09:30London Heathrow

11h 35m

1 stop

PHL16:05Philadelphia

28 Apr

PHL09:15Philadelphia

30h 45m

2 stops

LHR21:00London Heathrow

£537

United Airlines

5 May

LHR07:30London Heathrow

13h 35m

1 stop

PHL16:05Philadelphia

20 May

PHL10:25Philadelphia

17h 10m

2 stops

LHR08:35London Heathrow

£540

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 15/4

13:45-16:35

Nonstop7h 50m

Philadelphia

Sun 19/4

18:40-06:50

Nonstop7h 10m

£482

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 2/9

13:45-16:40

Nonstop7h 55m

Philadelphia

Wed 16/9

18:45-06:50

Nonstop7h 05m

£482

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 3/9

13:45-16:40

Nonstop7h 55m

Philadelphia

Thu 17/9

18:45-06:50

Nonstop7h 05m

£483

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 3/9

13:45-16:40

Nonstop7h 55m

Philadelphia

Sat 19/9

18:45-06:50

Nonstop7h 05m

£484

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 22/4

08:40-21:59

1 stop18h 19m

Philadelphia

Mon 4/5

06:00-06:30

1 stop19h 30m

£496

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 1/6

13:45-16:40

Nonstop7h 55m

Philadelphia

Sun 19/7

18:45-06:50

Nonstop7h 05m

£497

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 14/4

08:40-07:35

1 stop27h 55m

Philadelphia

Tue 5/5

18:33-06:30

1 stop30h 57m

£499

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 21/4

08:40-07:35

1 stop27h 55m

Philadelphia

Tue 28/4

18:33-06:30

1 stop30h 57m

£500

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 21/4

08:40-17:38

1 stop13h 58m

Philadelphia

Tue 28/4

08:25-06:30

1 stop17h 05m

£502

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 13/4

08:40-22:43

2 stops19h 03m

Philadelphia

Mon 20/4

09:15-21:00

2 stops30h 45m

£503

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 Heathrow Airport 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 month to fly to Delaware?

In general, September is the cheapest month to fly from London Heathrow Airport to Delaware. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £510. If you’re not able to fly to Delaware in September, then February is your next best option. Flight prices from London Heathrow Airport to Delaware during February average around £524.

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

On average, the least expensive day to fly to Delaware from London Heathrow Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £609. 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 Heathrow Airport to Delaware for around £674.

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 Heathrow Airport to Delaware during this time can be as low as £627. In contrast, the most expensive time of day to depart to Delaware is at midday when prices are around £633.

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

You are more likely to see cheaper flights to Delaware from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Delaware for around £576 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 Heathrow Airport for as low as £521 on momondo.

Cheap London Heathrow Airport to Delaware flight deals and tips

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

Fastest flight time	7h 50m
Direct flights	Every day
Airports in Delaware	17 airports

The fastest flight from London Heathrow Airport to Delaware takes 7h 50m

Direct flights go from London Heathrow Airport to Delaware every day.

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

Search flight deals

When did momondo last update prices for flights from London Heathrow Airport to Delaware?
Prices for flights from London Heathrow Airport to Delaware are updated daily.
How many operators does momondo search for flights from London Heathrow Airport to Delaware?
There are 9 operators available for flights from London Heathrow Airport to Delaware as of March 2026.
How old do you have to be to fly from London Heathrow Airport to Delaware?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Delaware.
What documentation or ID do you need to fly to Delaware?
The travel and health documents you'll need for your trip to Delaware may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Delaware. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

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

It is quick and easy to find London to Delaware flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Delaware that suits you.

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

Yes. momondo enables you to select and highlight flights to Delaware from London with this policy.

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

momondo provides multiple filters to help you find the best flight to Delaware from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are not ready to book a flight from London to Delaware now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Delaware and let you know when they change.