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Cheap flights from the United Kingdom to Washington from $391

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to Washington departing on 5/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from the United Kingdom to Washington

Recent round-trip flight deals from the United Kingdom to Washington

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:30 am - 11:45 am
STN
-
SEA
35h 15m
2 stops
Multiple Airlines Logo
3:40 pm - 11:20 pm
SEA
-
STN
23h 40m
2 stops
$638Multiple Airlines
Thu, May 21 - Thu, May 28
Icelandair Logo
9:25 pm - 5:55 pm
LHR
-
SEA
28h 30m
1 stop
Icelandair Logo
11:25 pm - 11:55 am
SEA
-
LHR
28h 30m
1 stop
$641Icelandair
Tue, May 19 - Fri, Jun 5
Icelandair Logo
3:40 pm - 8:40 pm
LGW
-
SEA
13h 00m
1 stop
Icelandair Logo
7:00 pm - 2:40 pm
SEA
-
LGW
11h 40m
1 stop
$642Icelandair
Thu, Oct 1 - Thu, Oct 15
Multiple Airlines Logo
8:30 am - 11:45 am
STN
-
SEA
35h 15m
2 stops
Multiple Airlines Logo
3:40 pm - 11:20 pm
SEA
-
STN
23h 40m
2 stops
$645Multiple Airlines
Thu, May 21 - Thu, May 28
Scandinavian Airlines Logo
8:25 pm - 1:45 pm
MAN
-
SEA
25h 20m
2 stops
Scandinavian Airlines Logo
3:55 pm - 8:55 am
SEA
-
MAN
33h 00m
1 stop
$710Scandinavian Airlines
Fri, May 22 - Fri, May 29
Scandinavian Airlines Logo
8:25 pm - 1:45 pm
MAN
-
SEA
25h 20m
2 stops
Scandinavian Airlines Logo
3:55 pm - 12:05 pm
SEA
-
MAN
36h 10m
2 stops
$728Scandinavian Airlines
Fri, May 22 - Sun, May 31
Virgin Atlantic Logo
9:20 am - 4:30 pm
LCY
-
SEA
15h 10m
1 stop
Virgin Atlantic Logo
5:40 pm - 4:40 pm
SEA
-
LCY
15h 00m
1 stop
$763Virgin Atlantic
Thu, May 14 - Mon, May 18
Virgin Atlantic Logo
9:20 am - 4:30 pm
LCY
-
SEA
15h 10m
1 stop
Virgin Atlantic Logo
5:45 pm - 6:30 pm
SEA
-
LCY
16h 45m
1 stop
$781Virgin Atlantic
Mon, May 18 - Mon, Jun 1
Delta Logo
8:25 am - 4:24 pm
LCY
-
SEA
15h 59m
1 stop
Delta Logo
1:45 pm - 9:30 am
SEA
-
LCY
11h 45m
1 stop
$789Delta
Thu, Jun 11 - Sun, Jul 5
Lufthansa Logo
9:45 am - 12:59 am
LCY
-
PDX
23h 14m
2 stops
Lufthansa Logo
10:10 am - 5:55 pm
PDX
-
LCY
23h 45m
2 stops
$1,007Lufthansa
Mon, May 4 - Mon, May 11

Icelandair flights from United Kingdom to State of Washington

Our best Icelandair deals on United Kingdom to State of Washington flight tickets
Icelandair
May 19
LHR9:25 pmLondon Heathrow
28h 30m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
Jun 5
SEA11:25 pmSeattle/Tacoma Intl
28h 30m
1 stop
LHR11:55 amLondon Heathrow
$641
Icelandair
Oct 1
LGW3:40 pmLondon Gatwick
13h 00m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
Oct 15
SEA7:00 pmSeattle/Tacoma Intl
11h 40m
1 stop
LGW2:40 pmLondon Gatwick
$642
Icelandair
May 4
LGW3:40 pmLondon Gatwick
13h 00m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
May 8
SEA7:00 pmSeattle/Tacoma Intl
11h 40m
1 stop
LGW2:40 pmLondon Gatwick
$646

KLM flights from United Kingdom to State of Washington

Our best KLM deals on United Kingdom to State of Washington flight tickets
KLM
Oct 1
LCY9:20 amLondon City
15h 19m
1 stop
SEA4:39 pmSeattle/Tacoma Intl
Oct 7
SEA1:45 pmSeattle/Tacoma Intl
11h 45m
1 stop
LCY9:30 amLondon City
$760
KLM
May 14
LCY9:20 amLondon City
15h 10m
1 stop
SEA4:30 pmSeattle/Tacoma Intl
May 27
SEA1:45 pmSeattle/Tacoma Intl
11h 45m
1 stop
LCY9:30 amLondon City
$784
KLM
Oct 1
LCY9:20 amLondon City
15h 19m
1 stop
SEA4:39 pmSeattle/Tacoma Intl
Oct 15
SEA9:30 amSeattle/Tacoma Intl
15h 20m
2 stops
LCY8:50 amLondon City
$786

momondo Fare Finder

 
Customize your flight search to find flights from United Kingdom to State of Washington that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated April 10, 2026.
Use the filters below to find and compare flights from the United Kingdom to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 5/21

8:30 am-11:45 am

2 stops35h 15m

Seattle/Tacoma Intl

Thu 5/28

3:40 pm-11:20 pm

2 stops23h 40m

$638

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 5/19

9:25 pm-5:55 pm

1 stop28h 30m

Seattle/Tacoma Intl

Fri 6/5

11:25 pm-11:55 am

1 stop28h 30m

$641
Quickest round-trip

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 10/1

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Thu 10/15

7:00 pm-2:40 pm

1 stop11h 40m

$642

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 5/21

8:30 am-11:45 am

2 stops35h 15m

Seattle/Tacoma Intl

Thu 5/28

3:40 pm-11:20 pm

2 stops23h 40m

$645

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Fri 5/22

8:25 pm-1:45 pm

2 stops25h 20m

Seattle/Tacoma Intl

Fri 5/29

3:55 pm-8:55 am

1 stop33h 00m

$710

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Fri 5/22

8:25 pm-1:45 pm

2 stops25h 20m

Seattle/Tacoma Intl

Sun 5/31

3:55 pm-12:05 pm

2 stops36h 10m

$728

LondonSeattle

LCY - SEA

LCYSEA

London City

Thu 5/14

9:20 am-4:30 pm

1 stop15h 10m

Seattle/Tacoma Intl

Mon 5/18

5:40 pm-4:40 pm

1 stop15h 00m

$763

LondonSeattle

LCY - SEA

LCYSEA

London City

Mon 5/18

9:20 am-4:30 pm

1 stop15h 10m

Seattle/Tacoma Intl

Mon 6/1

5:45 pm-6:30 pm

1 stop16h 45m

$781

LondonSeattle

LCY - SEA

LCYSEA

London City

Thu 6/11

8:25 am-4:24 pm

1 stop15h 59m

Seattle/Tacoma Intl

Sun 7/5

1:45 pm-9:30 am

1 stop11h 45m

$789

LondonPortland

LCY - PDX

LCYPDX

London City

Mon 5/4

9:45 am-12:59 am

2 stops23h 14m

Portland

Mon 5/11

10:10 am-5:55 pm

2 stops23h 45m

$1,007

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington from

How to get the cheapest flight ticket from United Kingdom to State of Washington

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

What is the cheapest month to fly to State of Washington?

The month of February is, on average, the cheapest month to fly to State of Washington from United Kingdom, with most prices found around $596. If you aren’t able to travel to State of Washington during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $667.

What is the cheapest day to depart on your flight to State of Washington?

The cheapest day to depart from United Kingdom to State of Washington is on a Monday. Travelers who choose to depart for State of Washington on a Monday will often find tickets for as low as $794. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from United Kingdom to State of Washington for around $1,032.

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

The cheapest time of day to fly to State of Washington is in the afternoon when flights can be purchased for as low as $864. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $881 on average. Flights to State of Washington from United Kingdom in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest United Kingdom to Washington flight route?

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

How far in advance should I book a flight to State of Washington?

You are more likely to see cheaper flights to State of Washington from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $776 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from United Kingdom for as low as $712 on momondo.

What cabin class options are available on United Kingdom to Washington flights?

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

Can stopping save me money on United Kingdom to State of Washington flights?

You could potentially save up to 5% on your flight if you consider stops on a United Kingdom to State of Washington flight.

Cheap United Kingdom to State of Washington flight deals and tips

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

Best Price Found

$642

Fastest flight time

9h 45m

Direct flights

Every day

Airports in State of Washington

96 airports
The best one-way flight to State of Washington from United Kingdom in the past 72 hours is $642. The best round-trip flight deal from United Kingdom to State of Washington found on momondo in the last 72 hours is $871.
The fastest flight from United Kingdom to State of Washington takes 9h 45m
Direct flights go from United Kingdom to State of Washington every day.
There are 96 airports in State of Washington. From United Kingdom there are direct flights to Portland (PDX), Seattle/Tacoma Intl (SEA).
Search flight deals

Frequently asked questions about flying from the United Kingdom to Washington

  • When did momondo last update prices for flights from United Kingdom to Washington?

    Prices for flights from United Kingdom to Washington are updated daily.

  • How many operators does momondo search for flights from United Kingdom to Washington?

  • How old do you have to be to fly from United Kingdom to Washington?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from United Kingdom to Washington.

  • What documentation or ID do you need to fly to Washington?

    The travel and health documents required for your trip to Washington can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from United Kingdom to State of Washington?

Best airlines flying from United Kingdom to State of Washington

Compare and see reviews for airlines that fly from United Kingdom to State of Washington with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $403Free CancellationRating
7.0
631 reviews
Search Icelandair flights
Virgin AtlanticPriceFrom $574Free CancellationRating
7.5
685 reviews
Search Virgin Atlantic flights
DeltaPriceFrom $594Free CancellationRating
7.9
8,393 reviews
Search Delta flights
American AirlinesPriceFrom $618Free CancellationRating
7.1
11,564 reviews
Search American Airlines flights
British AirwaysPriceFrom $660Free CancellationRating
6.7
7,867 reviews
Search British Airways flights
Air FrancePriceFrom $780Free CancellationRating
7.4
1,564 reviews
Search Air France flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from United Kingdom to Washington for you.

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

Yes. All flights to Washington from United Kingdom on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from United Kingdom to Washington?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington from United Kingdom.

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

Price alerts on flights to Washington from United Kingdom 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.

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