Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from the United Kingdom to Seattle from £328

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 Seattle departing on 28/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from the United Kingdom to Seattle

Recent return flight deals from the United Kingdom to Seattle

Enter your travel dates to find the best prices.
Icelandair Logo
20:35 - 17:00LHR-SEA
28h 25m1 stop
Icelandair Logo
14:35 - 19:30SEA-LHR
20h 55m1 stop
£474Icelandair
Find Deal
ma, 17 marras - su, 30 marras
Icelandair Logo
20:35 - 17:00LHR-SEA
28h 25m1 stop
Icelandair Logo
14:35 - 19:30SEA-LHR
20h 55m1 stop
£475Icelandair
Find Deal
su, 23 marras - su, 30 marras
Virgin Atlantic Logo
06:30 - 11:50LHR-SEA
13h 20m1 stop
Virgin Atlantic Logo
16:55 - 10:30SEA-LHR
9h 35mdirect
£476Virgin Atlantic
Find Deal
la, 31 tammi - ma, 9 helmi
British Airways Logo
09:25 - 11:30LHR-SEA
10h 05mdirect
British Airways Logo
19:50 - 12:20SEA-LHR
9h 30mdirect
£477British Airways
Find Deal
la, 28 helmi - su, 8 maalis
British Airways Logo
09:25 - 11:30LHR-SEA
10h 05mdirect
British Airways Logo
18:50 - 12:20SEA-LHR
9h 30mdirect
£478British Airways
Find Deal
ti, 13 tammi - ti, 27 tammi
Virgin Atlantic Logo
08:40 - 20:46LCY-SEA
20h 06m2 stops
Virgin Atlantic Logo
06:05 - 16:35SEA-LCY
26h 30m2 stops
£479Virgin Atlantic
Find Deal
la, 10 tammi - su, 25 tammi
Aer Lingus Logo
10:00 - 18:20MAN-SEA
16h 20m1 stop
Aer Lingus Logo
20:05 - 19:15SEA-MAN
15h 10m1 stop
£581Aer Lingus
Find Deal
su, 23 marras - su, 30 marras
Aer Lingus Logo
08:05 - 18:20MAN-SEA
18h 15m1 stop
Aer Lingus Logo
20:05 - 16:40SEA-MAN
12h 35m1 stop
£584Aer Lingus
Find Deal
su, 23 marras - ma, 1 joulu
KLM Logo
08:40 - 15:50LCY-SEA
15h 10m1 stop
KLM Logo
17:35 - 16:40SEA-LCY
15h 05m1 stop
£619KLM
Find Deal
ti, 14 huhti - to, 14 Touko
KLM Logo
05:50 - 11:50EDI-SEA
14h 00m1 stop
KLM Logo
15:05 - 23:10SEA-EDI
24h 05m1 stop
£639KLM
Find Deal
ke, 3 joulu - ma, 29 joulu

Finnair flights from United Kingdom to Seattle

Our best Finnair deals on United Kingdom to Seattle flight tickets
Finnair
24 Feb
LHR17:00London Heathrow
25h 23m
2 stops
SEA10:23Seattle/Tacoma Intl
3 Mar
SEA07:00Seattle/Tacoma Intl
15h 50m
1 stop
LHR06:50London Heathrow
£498
Find similar
Finnair
18 Feb
LHR14:55London Heathrow
10h 00m
SEA16:55Seattle/Tacoma Intl
14 Mar
SEA19:50Seattle/Tacoma Intl
9h 30m
LHR12:20London Heathrow
£505
Find similar
Finnair
24 Dec
LHR08:20London Heathrow
18h 54m
1 stop
SEA19:14Seattle/Tacoma Intl
6 Jan
SEA21:45Seattle/Tacoma Intl
27h 30m
1 stop
LHR09:15London Heathrow
£506
Find similar

Delta flights from United Kingdom to Seattle

Our best Delta deals on United Kingdom to Seattle flight tickets
Delta
18 Feb
LHR06:20London Heathrow
15h 00m
1 stop
SEA13:20Seattle/Tacoma Intl
14 Mar
SEA20:20Seattle/Tacoma Intl
9h 45m
LHR13:05London Heathrow
£499
Find similar
Delta
16 Nov
LHR08:40London Heathrow
35h 05m
1 stop
SEA11:45Seattle/Tacoma Intl
1 Dec
SEA07:15Seattle/Tacoma Intl
16h 35m
1 stop
LHR07:50London Heathrow
£559
Find similar
Delta
16 Nov
LHR08:40London Heathrow
35h 05m
1 stop
SEA11:45Seattle/Tacoma Intl
1 Dec
SEA09:30Seattle/Tacoma Intl
15h 30m
2 stops
LHR09:00London Heathrow
£565
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from United Kingdom to Seattle 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 279,928 searches. Data last updated 5 marraskuu 2025.
Use the filters below to find and compare flights from the United Kingdom to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

ma 17/11

20:35-17:00

1 stop28h 25m

Seattle/Tacoma Intl

su 30/11

14:35-19:30

1 stop20h 55m

£474

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

su 23/11

20:35-17:00

1 stop28h 25m

Seattle/Tacoma Intl

su 30/11

14:35-19:30

1 stop20h 55m

£475

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

la 31/1

06:30-11:50

1 stop13h 20m

Seattle/Tacoma Intl

ma 9/2

16:55-10:30

Nonstop9h 35m

£476

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

la 28/2

09:25-11:30

Nonstop10h 05m

Seattle/Tacoma Intl

su 8/3

19:50-12:20

Nonstop9h 30m

£477

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

ti 13/1

09:25-11:30

Nonstop10h 05m

Seattle/Tacoma Intl

ti 27/1

18:50-12:20

Nonstop9h 30m

£478

LondonSeattle

LCY - SEA

LCYSEA

London City

la 10/1

08:40-20:46

2 stops20h 06m

Seattle/Tacoma Intl

su 25/1

06:05-16:35

2 stops26h 30m

£479

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

su 23/11

10:00-18:20

1 stop16h 20m

Seattle/Tacoma Intl

su 30/11

20:05-19:15

1 stop15h 10m

£581

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

su 23/11

08:05-18:20

1 stop18h 15m

Seattle/Tacoma Intl

ma 1/12

20:05-16:40

1 stop12h 35m

£584

LondonSeattle

LCY - SEA

LCYSEA

London City

ti 14/4

08:40-15:50

1 stop15h 10m

Seattle/Tacoma Intl

to 14/5

17:35-16:40

1 stop15h 05m

£619

EdinburghSeattle

EDI - SEA

EDISEA

Edinburgh Turnhouse

ke 3/12

05:50-11:50

1 stop14h 00m

Seattle/Tacoma Intl

ma 29/12

15:05-23:10

1 stop24h 05m

£639

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Seattle from

How to get the cheapest flight ticket from United Kingdom to Seattle

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 Seattle?

The cheapest month to fly to Seattle from United Kingdom is in January. Flight prices, which tend to average around £486, are often lower during this time because this is during the off-season. The month of February is another great option to travel to Seattle, with average flight prices from United Kingdom averaging around £508.

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

According to our data, Wednesday is the cheapest day to fly to Seattle from United Kingdom. The lowest ticket price found for a Wednesday departure recently was £608. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Sunday is £703.

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

According to our data, the cheapest time of day to fly to Seattle is in the evening. momondo users have found flights departing from United Kingdom to Seattle in the evening for as low as £541. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive, with an average ticket price of £648.

What is the cheapest United Kingdom to Seattle/Tacoma Intl flight route?

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

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

You are more likely to see cheaper flights to Seattle from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around £595 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from United Kingdom for as low as £557 on momondo.

What cabin class options are available on United Kingdom to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on United Kingdom to Seattle/Tacoma Intl 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 Seattle flights?

You could potentially save up to 20% on your flight if you consider stops on a United Kingdom to Seattle flight.

Cheap United Kingdom to Seattle flight deals and tips

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

Best price found

£493

Fastest flight time

9h 45m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from United Kingdom in the past 72 hours is £493. The best return flight deal from United Kingdom to Seattle found on momondo in the last 72 hours is £565.
The fastest flight from United Kingdom to Seattle takes 9h 45m
Direct flights go from United Kingdom to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • When did momondo last update prices for flights from United Kingdom to Seattle/Tacoma Intl Airport?

    Prices for flights from United Kingdom to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from United Kingdom to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from United Kingdom to Seattle/Tacoma Intl Airport?

    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 United Kingdom to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from United Kingdom to Seattle?

Best airlines flying from United Kingdom to Seattle

Compare and see reviews for airlines that fly from United Kingdom to Seattle with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom £354Free CancellationRating
7.1
571 reviews
Search Icelandair flights
Air FrancePriceFrom £397Free CancellationRating
7.4
1,484 reviews
Search Air France flights
FinnairPriceFrom £410Free CancellationRating
7.6
1,335 reviews
Search Finnair flights
LufthansaPriceFrom £411Free CancellationRating
6.8
7,555 reviews
Search Lufthansa flights
KLMPriceFrom £415Free CancellationRating
7.7
1,405 reviews
Search KLM flights
United AirlinesPriceFrom £418Free CancellationRating
7.4
9,003 reviews
Search United Airlines flights
British AirwaysPriceFrom £435Free CancellationRating
6.7
7,496 reviews
Search British Airways flights
Scandinavian AirlinesPriceFrom £454Free CancellationRating
7.4
1,560 reviews
Search Scandinavian Airlines flights
Virgin AtlanticPriceFrom £455Free CancellationRating
7.5
672 reviews
Search Virgin Atlantic flights
DeltaPriceFrom £458Free CancellationRating
7.9
8,004 reviews
Search Delta flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Fife
Renton
SeaTac

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from United Kingdom to Seattle. momondo saves you time and could save you money on your trip.

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

Flights from United Kingdom to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

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

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

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

An easier way to manage your Seattle trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
pe 5/12
pe 12/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States