$347 Find Cheap Flights from the United Kingdom to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Seattle departing on 4/27. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Seattle
These are the airlines KAYAK users have selected most often from within our search results for flights to Seattle
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Everything you should know

Cheapest round-trip
$529
Overall average: $577
SWISS
Wed 4/15Wed 4/22
LGW - SEA • 2 stops
Cheapest non-stop
$530
Typical prices: $707-$873
British Airways
Mon 6/15Sat 6/20
LHR - SEA • Non-stop
Top airlines
British Airways
Most flights • 10 per week
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
EDI-SEA
Cheapest
LHR-SEA
Most popular
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 13% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from the United Kingdom to Seattle

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from the United Kingdom to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Wed, Apr 15 - Wed, Apr 22
SWISS Logo
9:25 am - 10:37 pm
LGW
-
SEA
21h 12m2 stops
SWISS Logo
10:48 am - 8:25 am
SEA
-
LGW
37h 37m2 stops
$529SWISS
Mon, Jan 19 - Mon, Feb 2
Air Canada Logo
11:10 am - 10:06 pm
LHR
-
SEA
18h 56m2 stops
Air Canada Logo
5:50 am - 7:10 am
SEA
-
LHR
17h 20m2 stops
$529Air Canada
Mon, Feb 2 - Sun, Feb 8
Virgin Atlantic Logo
12:20 pm - 2:45 pm
LHR
-
SEA
10h 25mnonstop
Virgin Atlantic Logo
9:55 pm - 6:20 am
SEA
-
LHR
24h 25m1 stop
$534Virgin Atlantic
Mon, Apr 27 - Thu, May 7
Delta Logo
8:40 am - 4:30 pm
LHR
-
SEA
15h 50m1 stop
Delta Logo
1:40 pm - 12:15 pm
SEA
-
LHR
14h 35m1 stop
$536Delta
Mon, Feb 23 - Wed, Mar 4
Delta Logo
2:30 pm - 4:35 pm
LHR
-
SEA
10h 05mnonstop
Delta Logo
4:45 pm - 10:30 am
SEA
-
LHR
9h 45mnonstop
$538Delta
Sun, Feb 1 - Tue, Feb 17
British Airways Logo
11:45 am - 11:51 pm
LGW
-
SEA
44h 06m2 stops
British Airways Logo
6:44 am - 7:00 pm
SEA
-
LGW
28h 16m2 stops
$540British Airways
Sat, Jan 24 - Mon, Jan 26
Icelandair Logo
11:55 am - 5:00 pm
LGW
-
SEA
13h 05m1 stop
Icelandair Logo
2:35 pm - 10:55 am
SEA
-
LGW
12h 20m1 stop
$549Icelandair
Fri, Apr 10 - Mon, Apr 20
Icelandair Logo
3:40 pm - 8:40 pm
LGW
-
SEA
13h 00m1 stop
Icelandair Logo
3:40 pm - 2:40 pm
SEA
-
LGW
15h 00m1 stop
$553Icelandair
Wed, Feb 4 - Wed, Feb 11
Virgin Atlantic Logo
10:00 am - 8:41 am
LCY
-
SEA
30h 41m2 stops
Virgin Atlantic Logo
6:05 am - 8:50 am
SEA
-
LCY
18h 45m2 stops
$567Virgin Atlantic
Tue, Mar 10 - Tue, Mar 17
British Airways Logo
9:10 am - 9:57 pm
LCY
-
SEA
19h 47m2 stops
British Airways Logo
7:15 am - 2:05 pm
SEA
-
LCY
23h 50m2 stops
$568British Airways
Booking Insights

KAYAK's insights & trends for flights to Seattle

Get data-powered insights and trends for flights to Seattle to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to Seattle?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

Based on KAYAK searches from the last 72 hours, if you fly from Edinburgh, you should have a good chance of getting the best deal to Seattle as it was the cheapest place to fly from. Prices were found for as low as $347 one-way and $529 for a round-trip flight. Also in the last 72 hours, the most popular connection to Seattle was from London and the lowest price for a round-trip flight was $529.

What is the cheapest month to fly to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights to Seattle is February, where tickets cost $681 on average for one-way flights. On the other hand, the most expensive months are April and December, where the average cost of tickets from the United Kingdom is $1,243 and $1,051 respectively. For return trips, the best month to travel is January with an average price of $636.

What is a good deal for flights to Seattle?

If you’re looking for cheap airfare to Seattle, 25% of our users found tickets to Seattle for the following prices or less: From London Heathrow Airport $596 one-way - $604 round-trip.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 62 days before departure.

Good to know

Low seasonJanuary
Cheapest flight$347
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly with an average 19% increase in price.
Flight from Edinburgh to Seattle

FAQs - booking Seattle flights

  • Are there any 24-hour food outlets at Seattle/Tacoma Intl Airport?

    Yes, there are, but all of them are to be found airside. If you are in transit, you can avail yourself of the round-the-clock Starbucks and Dilettante Chocolate & Mocha Café in the Central Terminal Food Court, while the B gates offer a McDonald’s and Qdoba Mexican Grill. Passengers arriving on late flights to Seattle can grab a drink and a small snack from Hudson News: the Central Terminal baggage reclaim branch is open 24h.

  • What services does Seattle/Tacoma Intl Airport provide for families with children?

    The Mothers’ Room nursing facilities at Seattle Airport are unusual in that they offer comfortable rocking chairs, dimmable lighting and footstools, as well as the usual baby care facilities. The room is located just inside the children’s play area, which is filled with brightly coloured toys and activities to keep young passengers occupied 24/7.

  • Is there an on-site hotel at Seattle/Tacoma Intl Airport?

    While there is no hotel within the airport grounds, weary travellers on flights to Seattle have several accommodation options located just outside. The Hilton Seattle Airport & Conference Centre is 3min away and offers a free shuttle service round the clock, as does the Red Lion Hotel Seattle Airport (4min away). The Red Roof Inn Seattle Airport SEATAC is also 4min away and has a pick-up schedule that varies depending on the time of day, while the La Quinta Inn & Suites offers transfers from 04:00 to 01:00.

  • What is the fastest route from Seattle/Tacoma Intl Airport to the city centre?

    Depending on the traffic, a taxi may be the quickest way to get from the airport to downtown Seattle. Both metered and flat rate cabs are available from the 3rd floor of the parking garage; expect to pay around $39 (£29.50) flat rate and for the trip to take 20-25min. A convenient alternative is to take public transport: the Link Light Rail is linked to baggage reclaim by a skybridge and has stops throughout the city. A one-way fare to Downtown stations is about $3 (£2.30).

  • What is the cheapest flight to Seattle?

    Based on KAYAK searches from the last 72 hours, if you fly from Edinburgh, you should have a good chance of getting the best deal to Seattle as it was the cheapest place to fly from. Prices were found for as low as $347 one-way and $529 for a round-trip flight. Also in the last 72 hours, the most popular connection to Seattle was from London and the lowest price for a round-trip flight was $529.

  • How far is Seattle/Tacoma Intl Airport from central Seattle?

    The distance between Seattle/Tacoma Intl Airport and downtown Seattle is 11 miles.

  • What is the name of Seattle’s airport?

    Seattle is served by Seattle/Tacoma Intl Airport, also commonly referred to as Seattle-Tacoma Intl, Seattle/Tacoma, or Seattle/Tacoma Intl. The airport code is SEA.

  • How much is a flight to Seattle?

    On average, a flight to Seattle costs $720. The cheapest price found on KAYAK in the last 2 weeks cost $497 and departed from London Heathrow Airport.

  • What is the cheapest day to fly to Seattle?

    Based on KAYAK data, the cheapest day to fly to Seattle is Wednesday where tickets can be as cheap as $759. On the other hand, the most expensive day to fly is Friday, where prices are $918 on average.

  • How does KAYAK find such low prices on flights to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Seattle?

    The cheapest time of day to fly to Seattle is generally in the evening, when flights cost $812 on average. The most expensive time of day to fly to Seattle is generally in the morning, which is peak travel time and where the average cost of a ticket is $852.

Top tips for finding cheap flights to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $596 or less one-way and $604 or less round-trip.
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Seattle flight deals.
  • Seattle/Tacoma Intl Airport (SEA) knows how to keep its passengers entertained. Live music is on offer every day, with performances to be found at numerous different locations throughout the terminal buildings.
  • There is also an extensive art collection at Seattle/Tacoma Intl Airport, which showcases paintings, sculptures, photography, glass work, folk art and installation art from regional and international artists. The STQRY app can provide more information and guide you around the half-mile of exhibits.
  • Seattle/Tacoma Intl Airport is large, featuring four terminals spread out over a wide area. While the Main and Central Terminals are connected via walkway, you will need to board a complimentary shuttle train to reach the North and South Terminals.
  • Flights to Seattle can be long and draining, but you don’t need to worry about staying connected while in transit at the airport – power outlets are hidden beneath most seats in the departure lounges.
  • Feeling thirsty after your flight to Seattle? As well as numerous drinking fountains, you will find environmentally friendly water bottle refill stations at several points around the terminal buildings.
  • Should you wish to lighten your load while in transit at Seattle/Tacoma Intl Airport or enjoy a short break in the city, luggage storage is available at Smarte Carte in the baggage reclaim area of the Main Terminal. As well as normal luggage, you can even store frozen and refrigerated items.

Reviews of the top 5 airlines serving from the United Kingdom to Seattle

 
See real verified KAYAK customer reviews for airlines flying to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from the United Kingdom to Seattle. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8031 reviews
7.2Food
7.9Comfort
7.8Entertainment
8.5Crew
8.1Boarding
Airline reviews

It was Delta, but the flight attendants were stressful and disrespectful. I am a diamond member a travel weekly. I have not had a negative thing to share in quite some time. But this was noticeable.

2.0 MediocreWilliam, Jan 2026
LGA - BOS
Read more Delta reviews

It was Delta, but the flight attendants were stressful and disrespectful. I am a diamond member a travel weekly. I have not had a negative thing to share in quite some time. But this was noticeable.

Comfort Plus seat 11E seemed smaller than prior flights. The movie selection is good. Watched most of the most recent Tron movie. I'll watch the remaining part later as my movie is saved in the Delta Seatback Experience.

Flight was late from Newark to Atlanta, I asked flight attendant to please let my family of 3 out first when we landed to Atlanta because we were late for our connecting flight to Quito. She didn't and we were late for 5 minutes we couldn't board the plane and spend hours trying to get another flight with customer service for the next day.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Late delayed flight delays boarding and delays leaving and delays on arrival too. Cramped plane no room no food.

DTW line is too long. The flights from DTW to BWI are always delayed for unknown reasons.

Delta canceled our flight and we had to scramble to find another airline to get home. Phoenix is not a delta hub so they didn’t have another plane. It would have been a red eye though Salt Lake City. Getting in at 5am. No bueno.

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

2 of the seats in row 31 the entertainment system was not working, and one seat the tray table did not go all the way down. Flight arrived early and departed on time which was great.

Flight was operated by Virgin Atlantic and it was up to their usual high standard. Minor grips about some issues, but they are really first world issues and as a whole, was an excellent flight.

Food has been disappointing in both legs of flight to india

Great staff great experience, made a 2 hour delay very bearable

Great staff, great experience, made a 2 hour delay very bearable

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

I was my pleasure to fly virgin on my birthday for my first solo trip ever 🫶🏼

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

Overall, flight was excellent but check in was very slow for Premium Economy. Economy queue was shorter but we weren't allowed to use it.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

Great crew - old style upper class seats on the older fleet now feels dated

Premium economy more comfortable than economy, but not by much. Did was awful, do not try the omelette. Flight crew were helpful. Flight was delayed by over an hour. Overall but bad, arrived safely and thank God.

It was fine. My connection in Charlotte to go to WPB was too late and I had to spend the night in the Charlotte Airport in the mini suites.

The flight was on time and arrived early. The crew were friendly and helpful.

We had a 2 hour delay that impacted our comanions further travel. I have a feeling AA knows there is a problem at the Cabo airport and does not account for that.

My carry on baggage was damaged. Entire trip, I had to carry the baggage. When complained to the boarding crew, they got mad at me and still asked me to valet check in the cabin baggage. Rude boarding crew!!!

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

Nothing to write home about, average flight experience. Seats were spacious enough, crew friendly enough. Loved the AA entertainment/wifi service.

Kayak was among the missing. There was not the usual advice regarding next gate after arriving in Dallas. No communication after the reminder to check in before the Moline flight. What happened?

They should have allowed for extra time to de-ice the plane before boarding passengers. This delayed us about 10-15 mins after we boarded. Overall experience was fine. Crew was friendly and on top of everything. We didn’t have any issues during the flight.

Flight was delayed because of a bird strike. They had another plane available within 45 minutes.

The business class seats are dated and uncomfortable. The space is bare minimum and there is absolutely no privacy. For $4K, this is not what I expect.

Again, we paid $ 328.00 for specific seats are were assigned those seats.

Having been prepared for paying for everything on board other than water, coffee and tea the service was OK. Food and drink is expensive but the food was OK if limited in scope. Plane was clean and obviously well serviced. After complaining about having to walk in wind and rain to a get a bus to the airport the same thing happened at Portland. I’m sure you could get a terminal gate flight, complimentary food and drink for not much more money without traipsing through rain and slush in Reykjavik. Not bad but not great.

If there was a disclaimer regarding food service or lack thereof, l missed it. If l had known l would have prepared better. Same with transferring at Reykjavik. No information about disembarking via stairs into rain, slush and puddles deep enough to swallow a foot. After being treated to haute cuisine restaurants and warm inviting environment during the flight, the airport is, let’s be kind, disappointing. Plane was comfortable, Airbus, staff were welcoming enough. I would likely try the route again. Maybe have a night and day in Iceland. Maybe not.

They had a 4 hour delay and left my luggage in Iceland and it didn’t arrive in Portland until 11/1

Iceland air transfer was bad. They lost my luggage and I just received it 11/1

The boarding process seem to take longer than necessary, resulting in a 20+ minute delay

It was too cold in the plane my feet froze

No meals included on this long international flight. Most airlines will offer you a meal when flying internationally. Not Icelandair. Your included choices are water and coffee. Poor customer service. The airport was also very confusing.

I flew Icelandair with my partner from Prague to the US. Overall flight time was around 12 hours, with a connecting flight in Iceland. I have flown internationally for years and with multiple airlines. Every airline serves you a meal when traveling internationally. Icelandair not only did not offer an inclusive meal, but they did not even offer a snack. The only things they served over our long flight was water and coffee. Ridiculous! Never again will I fly with Icelandair.

Best smelling onboard bathrooms ever. Even after use the whole flight. Biggest overhead bins. Most legroom in economy class. Great Icelandiic music. Really nice staff. Icelandair is awesome! (Don’t fly Air Canada! During the strike they lied about no flights available (I booked this flight myself) and hid the process to get money back on their website by obscuring menu titles, then made it difficult and time consuming to fill out. I’m Canadian. Don’t trust Air Canada!

Check-in experience, for business call please provide a premium experience

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Entertainment devices on A380 need to be fixed, the seats might do with updates.

Everything. Employees offered to help me because I had to use a cane.

Check-in and boarding were great. On flight staff were rude and disrespectful. Paid for extra room and found it incredibly cramped. Bathrooms kept in poor condition. Overall negative experience.

Great seat in premium economy, great food and drinks throughout lots of in flight entertainment. 1 hour 40 min delayed flying out , 2 1/2 hour wait at passport control in tampa

My seat cushion was poor. The cushion was compressed and was uncomfortable for such a long flight.

I was in a bulkhead seat and my tray table wasn't level. Eating was difficult.

Audi visual not working for a whole group of seats in first class. How does a plane leave the main hub in such poor condition? How much that we can’t see so immediately is also compromised?

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Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle