What airlines fly to London?

British Airways, Delta and Virgin Atlantic are the top three most popular airlines that fly to London from State of Washington according to our data. British Airways is the first choice among our users, with 34% of people opting to fly with this airline when traveling to London. Keep in mind that there are 15 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

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

Icelandair and WestJet are the most popular carriers operating from Washington to London

How many flights depart from State of Washington to London on average per day?

The number of flights available between State of Washington and London is 23 per day as of July 2025. The most frequent departure time is 8:00PM, with 50% of daily flights leaving in the afternoon.

How many flights depart from State of Washington to London on average per week?

The number of flights available between State of Washington and London is 167 per week as of July 2025. The most frequent departure day is Wed, with 17% of weekly flights leaving on this day.

How long does it take to fly to London?

If you’re flying from a popular airport in State of Washington, such as Seattle or Pasco, and flying into London, then you can expect flight times to average 9h 20m and 12h 28m, respectively.

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

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

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

There are 15 operators available for flights from Washington to London as of July 2025.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to London.

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

The travel and health documents you'll need for your trip to London 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 London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$220 Cheap Flights from Washington to London in 2025

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Find the cheapest flights from Washington to London

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

7:20 am - 6:25 pmSEA-LGW

27h 05m2 stops

10:00 pm - 8:45 pmLGW-SEA

30h 45m2 stops

$462

Find Deal

mié., ago. 13 - mié., ago. 20

8:25 pm - 2:15 pmSEA-LHR

9h 50mnonstop

6:15 am - 11:15 amLHR-SEA

13h 00m1 stop

$462Virgin Atlantic

Find Deal

dom., ago. 10 - mar., ago. 26

7:35 pm - 6:55 pmSEA-LHR

15h 20m1 stop

9:50 am - 5:50 pmLHR-SEA

16h 00m1 stop

$465Aer Lingus

Find Deal

dom., sep. 7 - mar., sep. 23

7:35 pm - 8:20 pmSEA-LHR

16h 45m1 stop

9:50 am - 5:50 pmLHR-SEA

16h 00m1 stop

$471Aer Lingus

Find Deal

lun., sep. 8 - vie., sep. 19

7:00 pm - 2:40 pmSEA-LGW

11h 40m1 stop

3:40 pm - 5:50 pmLGW-SEA

34h 10m1 stop

$486Icelandair

Find Deal

mar., sep. 30 - sáb., oct. 11

7:20 am - 6:30 amSEA-LHR

15h 10m1 stop

8:00 am - 6:29 pmLHR-SEA

18h 29m1 stop

$486United Airlines

Find Deal

dom., ago. 10 - mar., ago. 26

2:45 pm - 10:55 amPDX-LGW

12h 10m1 stop

11:55 am - 5:00 pmLGW-PDX

13h 05m1 stop

$487Icelandair

Find Deal

lun., nov. 3 - lun., nov. 17

8:20 pm - 1:40 pmSEA-LHR

9h 20mnonstop

9:25 am - 11:10 amLHR-SEA

9h 45mnonstop

$495British Airways

Find Deal

mié., oct. 1 - mar., oct. 14

6:50 pm - 12:20 pmSEA-LHR

9h 30mnonstop

2:55 pm - 4:55 pmLHR-SEA

10h 00mnonstop

$496British Airways

Find Deal

mié., nov. 12 - mié., nov. 19

7:15 am - 6:30 amSEA-LHR

15h 15m1 stop

7:25 am - 4:59 pmLHR-SEA

17h 34m1 stop

$501United Airlines

Find Deal

mié., sep. 24 - mié., oct. 1

British Airways flights from State of Washington to London

Our best British Airways deals on State of Washington to London flight tickets

British Airways

Oct 1

SEA8:20 pmSeattle/Tacoma Intl

9h 20m

LHR1:40 pmLondon Heathrow

Oct 14

LHR9:25 amLondon Heathrow

9h 45m

SEA11:10 amSeattle/Tacoma Intl

$495

Find similar

British Airways

Nov 12

SEA6:50 pmSeattle/Tacoma Intl

9h 30m

LHR12:20 pmLondon Heathrow

Nov 19

LHR2:55 pmLondon Heathrow

10h 00m

SEA4:55 pmSeattle/Tacoma Intl

$496

Find similar

British Airways

Aug 19

SEA1:30 pmSeattle/Tacoma Intl

9h 20m

LHR6:50 amLondon Heathrow

Sep 19

LHR9:50 amLondon Heathrow

9h 45m

SEA11:35 amSeattle/Tacoma Intl

$505

Find similar

Air Canada flights from State of Washington to London

Our best Air Canada deals on State of Washington to London flight tickets

Air Canada

Oct 8

SEA2:55 pmSeattle/Tacoma Intl

14h 25m

1 stop

LHR1:20 pmLondon Heathrow

Oct 16

LHR8:40 amLondon Heathrow

17h 56m

2 stops

SEA6:36 pmSeattle/Tacoma Intl

$499

Find similar

Air Canada

Oct 8

PDX9:55 amPortland

15h 40m

2 stops

LHR9:35 amLondon Heathrow

Oct 16

LHR8:40 amLondon Heathrow

18h 06m

2 stops

PDX6:46 pmPortland

$525

Find similar

Air Canada

Sep 14

PDX6:15 amPortland

16h 15m

2 stops

LHR6:30 amLondon Heathrow

Sep 30

LHR2:10 pmLondon Heathrow

16h 51m

1 stop

PDX11:01 pmPortland

$544

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

mié. 8/13

7:20 am-6:25 pm

2 stops27h 05m

London Gatwick

mié. 8/20

10:00 pm-8:45 pm

2 stops30h 45m

$462

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

dom. 8/10

8:25 pm-2:15 pm

Nonstop9h 50m

London Heathrow

mar. 8/26

6:15 am-11:15 am

1 stop13h 00m

$462

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

dom. 9/7

7:35 pm-6:55 pm

1 stop15h 20m

London Heathrow

mar. 9/23

9:50 am-5:50 pm

1 stop16h 00m

$465

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

lun. 9/8

7:35 pm-8:20 pm

1 stop16h 45m

London Heathrow

vie. 9/19

9:50 am-5:50 pm

1 stop16h 00m

$471

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

mar. 9/30

7:00 pm-2:40 pm

1 stop11h 40m

London Gatwick

sáb. 10/11

3:40 pm-5:50 pm

1 stop34h 10m

$486

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

dom. 8/10

7:20 am-6:30 am

1 stop15h 10m

London Heathrow

mar. 8/26

8:00 am-6:29 pm

1 stop18h 29m

$486

PortlandLondon

PDX - LGW

PDXLGW

Portland

lun. 11/3

2:45 pm-10:55 am

1 stop12h 10m

London Gatwick

lun. 11/17

11:55 am-5:00 pm

1 stop13h 05m

$487

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mié. 10/1

8:20 pm-1:40 pm

Nonstop9h 20m

London Heathrow

mar. 10/14

9:25 am-11:10 am

Nonstop9h 45m

$495

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mié. 11/12

6:50 pm-12:20 pm

Nonstop9h 30m

London Heathrow

mié. 11/19

2:55 pm-4:55 pm

Nonstop10h 00m

$496

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

mié. 9/24

7:15 am-6:30 am

1 stop15h 15m

London Heathrow

mié. 10/1

7:25 am-4:59 pm

1 stop17h 34m

$501

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from State of Washington to London

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 London?

The cheapest month to fly to London from State of Washington is in October. Flight prices, which tend to average around $664, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from State of Washington averaging around $674.

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

The cheapest day to depart from State of Washington to London is on a Tuesday. Travelers who choose to depart for London on a Tuesday will often find tickets for as low as $809. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $930. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

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

Flying to London from State of Washington in the evening is the least expensive time of day to depart. momondo users have found prices as low as $849 when looking at flights departing in the evening. Flights to London are more costly in the morning, with an average ticket price of $980. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Washington to London flight route?

Fly from Seattle/Tacoma Intl to London Heathrow for the best Washington - London flight prices

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

You are more likely to see cheaper flights to London from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $805 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from State of Washington for as low as $706 on momondo.

What cabin class options are available on Washington to London flights?

There are 4 cabin classes available to choose from on Washington to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap State of Washington to London flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to London

Best Price Found	$220
Fastest flight time	9h 20m
Direct flights	Every day
Airports in London	5 airports

The best one-way flight to London from State of Washington in the past 72 hours is $220. The best round-trip flight deal from State of Washington to London found on momondo in the last 72 hours is $462.

The fastest flight from State of Washington to London takes 9h 20m

Direct flights go from State of Washington to London every day.

There are 5 airports near London: London City (LCY), London Heathrow (LHR), London Luton (LTN), London Stansted (STN), London Gatwick (LGW)

Search flight deals

When did momondo last update prices for flights from Washington to London?
Prices for flights from Washington to London are refreshed on a daily basis.
How many operators does momondo search for flights from Washington to London?
There are 15 operators available for flights from Washington to London as of July 2025.
How old do you have to be to fly from Washington to London?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to London.
What documentation or ID do you need to fly to London?
The travel and health documents you'll need for your trip to London 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 London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from State of Washington to London?
momondo data reveals that the most frequently booked plane model on the route from State of Washington to London is Boeing 787-10 Dreamliner, representing 35.06% of all bookings. The subsequent popular models are Airbus A330-900neo at 20.82%, Boeing 777-300 at 13.28%, and Boeing 787-9 Dreamliner at 8.65%.

Best airlines flying from State of Washington to London

Compare and see reviews for airlines that fly from State of Washington to London with momondo

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom $378	Free Cancellation	Rating 6.8 7,275 reviews	Search Lufthansa flights
Icelandair	PriceFrom $503	Free Cancellation	Rating 7.0 520 reviews	Search Icelandair flights
Scandinavian Airlines	PriceFrom $532	Free Cancellation	Rating 7.3 1,457 reviews	Search Scandinavian Airlines flights
United Airlines	PriceFrom $547	Free Cancellation	Rating 7.4 8,900 reviews	Search United Airlines flights
Finnair	PriceFrom $556	Free Cancellation	Rating 7.6 1,316 reviews	Search Finnair flights
Air France	PriceFrom $565	Free Cancellation	Rating 7.5 1,465 reviews	Search Air France flights
Iberia	PriceFrom $578	Free Cancellation	Rating 7.0 2,859 reviews	Search Iberia flights
British Airways	PriceFrom $580	Free Cancellation	Rating 6.6 7,222 reviews	Search British Airways flights
Aer Lingus	PriceFrom $583	Free Cancellation	Rating 7.1 1,192 reviews	Search Aer Lingus flights
KLM	PriceFrom $596	Free Cancellation	Rating 7.8 1,383 reviews	Search KLM flights

Gatwick

Hounslow

Dover

Slough

Luton

Dartford

Guildford

Milton Keynes

Stansted

Hayes

Crawley

Croydon

Chelmsford

Ilford

Brentwood

Colchester

Folkestone

Watford

Canterbury

Richmond

Why use momondo?

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

Finding the right flight to London from Washington is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

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

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

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

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

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

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Washington and alert you when they change.