$356 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 3/23. 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
$590
Overall average: $723
Icelandair
Mon 3/9Mon 3/16
MAN - SEA • 1 stop
Cheapest non-stop
$627
Typical prices: $684-$769
Virgin Atlantic
Thu 1/15Thu 1/22
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
GLA-SEA
Cheapest
LHR-SEA
Most popular
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 10% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Mon, Mar 9 - Mon, Mar 16
Icelandair Logo
11:55 am - 6:00 pmMAN-SEA
13h 05m1 stop
Icelandair Logo
3:35 pm - 10:45 amSEA-MAN
12h 10m1 stop
$590Icelandair
Find Deal
Thu, Jan 15 - Thu, Jan 22
Virgin Atlantic Logo
12:20 pm - 2:53 pmLHR-SEA
10h 33mnonstop
Virgin Atlantic Logo
4:45 pm - 10:30 amSEA-LHR
9h 45mnonstop
$627Virgin Atlantic
Find Deal
Tue, Feb 24 - Tue, Mar 3
British Airways Logo
9:25 am - 11:30 amLHR-SEA
10h 05mnonstop
British Airways Logo
1:25 pm - 7:00 amSEA-LHR
9h 35mnonstop
$629British Airways
Find Deal
Tue, Mar 10 - Tue, Mar 17
British Airways Logo
9:25 am - 12:30 pmLHR-SEA
10h 05mnonstop
British Airways Logo
7:50 pm - 12:20 pmSEA-LHR
9h 30mnonstop
$631British Airways
Find Deal
Tue, Dec 2 - Mon, Dec 8
SWISS Logo
7:10 pm - 9:00 pmLCY-SEA
33h 50m2 stops
SWISS Logo
1:05 pm - 5:05 pmSEA-LCY
20h 00m2 stops
$736SWISS
Find Deal
Tue, Dec 9 - Thu, Jan 8
SWISS Logo
9:15 am - 11:15 pmLCY-SEA
22h 00m2 stops
SWISS Logo
12:35 pm - 5:05 pmSEA-LCY
20h 30m2 stops
$754SWISS
Find Deal
Thu, Mar 5 - Mon, Mar 9
American Airlines Logo
8:40 am - 11:32 pmGLA-SEA
22h 52m2 stops
American Airlines Logo
7:50 pm - 6:15 pmSEA-GLA
15h 25m1 stop
$849American Airlines
Find Deal
Wed, Jan 14 - Sun, Jan 18
Delta Logo
6:05 am - 6:23 pmGLA-SEA
20h 18m2 stops
Delta Logo
7:25 am - 9:55 amSEA-GLA
18h 30m2 stops
$874Delta
Find Deal
Thu, Mar 12 - Mon, Mar 16
Delta Logo
6:00 am - 12:35 pmBRS-SEA
13h 35m1 stop
Delta Logo
4:00 pm - 1:10 pmSEA-BRS
14h 10m1 stop
$957Delta
Find Deal
Thu, Mar 26 - Mon, Mar 30
American Airlines Logo
9:30 am - 11:08 pmNCL-SEA
20h 38m2 stops
American Airlines Logo
1:48 pm - 4:35 pmSEA-NCL
18h 47m2 stops
$1,159American Airlines
Find Deal
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 Glasgow, 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 $356 one-way and $590 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 $627.

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 March, where tickets cost $771 on average for one-way flights. On the other hand, the most expensive months are April and January, where the average cost of tickets from the United Kingdom is $1,243 and $1,111 respectively. For return trips, the best month to travel is January with an average price of $666.

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 $728 one-way - $790 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$356
Best time to beat the crowds but there is an average 6% increase in price.
Most popular time to fly with an average 17% increase in price.
Flight from Glasgow 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 Glasgow, 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 $356 one-way and $590 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 $627.

  • 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 $870. The cheapest price found on KAYAK in the last 2 weeks cost $592 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 $770. On the other hand, the most expensive day to fly is Sunday, where prices are $1,121 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 $827 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 $860.

Top tips for finding cheap flights to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $728 or less one-way and $790 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 8010 reviews
8.1Boarding
7.9Comfort
7.3Food
7.9Entertainment
8.5Crew
Airline reviews

The ticket agents in West Palm Beach on Friday afternoon Nov. 7th were incredible in getting us on an earlier plane to Atlanta during the government shutdown. Had the taken our original flight we would have missed our connection. She did this on her own, We didn't even have to ask, and she did it all with a smile and showing genuine concern that we would be taken care of. We are very grateful and thankful. We fly often, and now we will be sure to fly Delta.

10.0 ExcellentDuane, Nov 2025PBI - ATL
Read more Delta reviews

The ticket agents in West Palm Beach on Friday afternoon Nov. 7th were incredible in getting us on an earlier plane to Atlanta during the government shutdown. Had the taken our original flight we would have missed our connection. She did this on her own, We didn't even have to ask, and she did it all with a smile and showing genuine concern that we would be taken care of. We are very grateful and thankful. We fly often, and now we will be sure to fly Delta.

the over had ligth did not work'd for the all way

Flight delayed then cancelled. Misplaced luggage. Still do not have. Rented car 1100 mile drive. I had to buy some overnight Hotels clothes toiletries gas food at my expense. Still not home. Not sure where luggage is. Over 4 hours on hold to Felta

I truly love flying with Delta. They have always treated me with the upmost respect

Our flight attendant in FIRST CLASS was one of the worst I’ve ever had. She was not at all pleasant, nor particularly good at her service.

Everything went well and was good. Nothing exceptional, but no complaints either. Cheap seats are pretty comfortable.

DELTA does a terrific job making sure you are well taken care of during the flight, gives you assurance before the flight through numerous email notifications about your upcoming flight & lastly good follow up after the flight making sure your needs were mat. It has been, is & will continue to be my carrier of choice in all my future travels. Good Job DELTA

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

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.

Food was excellent. Service was very good. Staff was very helpful to all passengers.

flight was good until we arrived at cmh ten minutes early but then sat on tarmac for twenty minutes because a plane was at our gate, so we had to wait despite the pilot tellling us that 3 other gates were open.

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

I have a gluten allergy so did have any food

I have a gluten allergy so didn't have any food

Loved the crew . Absolutely no complaints. Except for luggage lost

Everything was good The connects, with no blame to crew. Or pilots. I understand they are short staffed. Everything went well for me. I'll be using you guys again in May if not sooner.

this plane was really old, had exit row seats and tray was in arm of seat so super uncomfortable to use. another seat they could t even use the tray it was broke. seat i. front of me had duct tape on it cause seat was ripped open... this plane should either be updated or retired.

Baggage handling poor. Second time this has happened. My bag went to San Francisco instead of Fiji. No apology. Luckily Nadi airport staff are fantastic. My bag arrived in Fiji the next day.

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.

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!

Everything sucked. No food, one small glass of water, a tiny coffee, 5.5 hour delay with no customer service. Would never recommend flying them.

Great on board entertainment Tasty food Cattle class obviously crammed but not as bad as shorter hall flights

Logan gate staff was unhelpful. Arrived early, come to find out the airbus scheduled was reassigned and I did not have a seat. The desk agent spoke to his supervisor who instructed him to give me a boarding pass to get up to gate area, he was polite. At the gate the fellow was sitting to the side with two other BA staff . I asked him if he could help me, his answer was” we are on a break, we are closed” then turned his back. I am almost 70, drove 4 1/2 hours to Boston and had been looking forward to this trip for 5 months. I have worked in service many times in my life and this is not how it is done. I eventually (1/2 hr) before boarding was able to get a seat. The rest of the flight experience was unremarkable.

The boarding process was chaotic at LHR and the seat was not as comfortable as other airlines....

Great flight. One unique individual assisting in business class who should have not been there. Need more generic meals, not British centric.

Not my definition of first class. No leg room and barely any recline. The food was good. The crew was great. The comfort for the price I paid for London to Cairo was highway robbery. The Wi-Fi didn't work for me either.

There might be more food options for people who can't eat so much starch/sugar/bread/rice. Meat, cheese, walnuts/pecans for snack, maybe jerky or other kinds of meat-based snacks would be better than bread and rice and sweets. I had an extra chardonnay, which was fine. The entertainment was great.

Unfortunately, my flight was cancelled because of some sort of emergency over the Atlantic and had to return to London. While I think British Airways made every effort to mitigate the situation, I must say it was still pretty unpleasant. I do appreciate the fact, however, that British Airways put my safety first…and I think the effort to correct a bad situation was very sincere. But I think the process might be handled better in future.

Crew service was poor and very little difference between premium economy and economy. Disappointed.

My bags never made it on the flight and I now have to wait for them to arrive hopefully tomorrow. You can’t even track your bags in the app to see where they are since they didn’t arrive. You have to file a claim and then wait for them to inform you when you will receive your bag. We were already delayed for an hour due to baggage so I don’t understand how my bag didn’t make the flight.

One of the worst experience given the middle seat even asked for the change no one honored,boarded at the end and overall one of the worst experience

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Everything you need to know for your flight to Seattle

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