$343 Find Cheap Flights from the United Kingdom to Seattle - Compare and Save

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Cheap Flights from the United Kingdom to Seattle

 
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Thu, Oct 22 - Wed, Oct 28
Icelandair Logo
9:25 pm - 5:55 pmLHR  London Heathrow-SEA Seattle/Tacoma Intl
28h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
3:35 pm - 10:50 amSEA  Seattle/Tacoma Intl-LHR London Heathrow
12h 15m1 stop Reykjavik Keflavik Intl
$656Icelandair
Mon, Oct 12 - Thu, Nov 12
Icelandair Logo
9:25 pm - 5:55 pmLHR  London Heathrow-SEA Seattle/Tacoma Intl
28h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
2:35 pm - 10:50 amSEA  Seattle/Tacoma Intl-LHR London Heathrow
12h 15m1 stop Reykjavik Keflavik Intl
$656Icelandair
Thu, Sep 24 - Sat, Oct 10
Virgin Atlantic Logo
6:15 am - 11:15 amLHR  London Heathrow-SEA Seattle/Tacoma Intl
13h 00m1 stop Paris Charles de Gaulle
Virgin Atlantic Logo
9:50 pm - 3:35 pmSEA  Seattle/Tacoma Intl-LHR London Heathrow
9h 45mnonstop
$658Virgin Atlantic
Thu, Sep 24 - Sat, Oct 10
Virgin Atlantic Logo
6:15 am - 11:15 amLHR  London Heathrow-SEA Seattle/Tacoma Intl
13h 00m1 stop Paris Charles de Gaulle
Virgin Atlantic Logo
11:45 am - 1:15 pmSEA  Seattle/Tacoma Intl-LHR London Heathrow
17h 30m1 stop Atlanta Hartsfield-Jackson
$664Virgin Atlantic
Tue, Oct 20 - Tue, Oct 27
Multiple Airlines Logo
11:00 am - 8:40 pmLGW  London Gatwick-SEA Seattle/Tacoma Intl
17h 40m2 stops Stockholm Arlanda Reykjavik Keflavik Intl
Multiple Airlines Logo
3:35 pm - 4:20 pmSEA  Seattle/Tacoma Intl-LGW London Gatwick
17h 45m2 stops Reykjavik Keflavik Intl Stockholm Arlanda
$664Multiple Airlines
Tue, Oct 6 - Tue, Oct 13
Multiple Airlines Logo
5:50 pm - 5:55 pmLGW  London Gatwick-SEA Seattle/Tacoma Intl
32h 05m2 stops Kastrup Copenhagen Reykjavik Keflavik Intl
Multiple Airlines Logo
7:00 pm - 6:25 pmSEA  Seattle/Tacoma Intl-LGW London Gatwick
15h 25m2 stops Reykjavik Keflavik Intl Kastrup Copenhagen
$666Multiple Airlines
Thu, Oct 8 - Thu, Oct 15
KLM Logo
9:55 am - 4:35 pmLHR  London Heathrow-SEA Seattle/Tacoma Intl
14h 40m1 stop Amsterdam Schiphol
KLM Logo
5:30 pm - 11:20 amSEA  Seattle/Tacoma Intl-LHR London Heathrow
9h 50mnonstop
$694KLM
Fri, Nov 20 - Mon, Nov 30
British Airways Logo
9:55 am - 4:50 pmEDI  Edinburgh Turnhouse-SEA Seattle/Tacoma Intl
14h 55m1 stop London Heathrow
British Airways Logo
6:45 pm - 3:15 pmSEA  Seattle/Tacoma Intl-EDI Edinburgh Turnhouse
12h 30m1 stop London Heathrow
$695British Airways
Mon, Oct 12 - Sun, Oct 25
KLM Logo
6:30 am - 11:52 amLHR  London Heathrow-SEA Seattle/Tacoma Intl
13h 22m1 stop Amsterdam Schiphol
KLM Logo
5:45 pm - 10:40 amSEA  Seattle/Tacoma Intl-LHR London Heathrow
9h 55mnonstop
$707KLM
Thu, Dec 24 - Thu, Jan 7
British Airways Logo
11:50 am - 4:50 pmMAN  Manchester-SEA Seattle/Tacoma Intl
13h 00m1 stop London Heathrow
British Airways Logo
6:12 am - 9:15 amSEA  Seattle/Tacoma Intl-MAN Manchester
19h 03m2 stops Philadelphia London Heathrow
$908British 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?

In the last 5 days, the cheapest flight deal to Seattle was found on the route from Manchester, at $645 return. The most popular connection is from London to Seattle and KAYAK users have found round-trip deals for as low as $656 in the last 5 days.

What is the cheapest day to fly to Seattle?

Based on KAYAK data, the cheapest day to fly to Seattle is Monday where round-trip tickets can be as cheap as $840. On the other hand, the most expensive day to fly is Friday, where round-trip prices are $954 on average.

What is the cheapest month to fly to Seattle?

The cheapest month for flights to Seattle is February, where tickets cost $671 on average for return flights. On the other hand, the most expensive months are December and July, where the average cost of tickets from the United Kingdom is $885 and $881 respectively. For one-way flights, the best month to travel is September with an average price of $629.

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

The cheapest time of day to fly to Seattle is generally in the afternoon, when round-trip flights cost $846 on average. The most expensive time of day to fly to Seattle is generally in the evening, which is peak travel time and where the average cost of a ticket is $929.

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 $871 round-trip.

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

To get a below average price, you should book around 3 weeks before departure, which saves you about 26% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Good to know

Low season

January

Cheapest flight

$343
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly with an average 15% increase in price.
Flight from Manchester 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?

    In the last 5 days, the cheapest flight deal to Seattle was found on the route from Manchester, at $645 return. The most popular connection is from London to Seattle and KAYAK users have found round-trip deals for as low as $656 in the last 5 days.

  • 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 $866. The cheapest price found on KAYAK in the last 2 weeks cost $496 and departed from London Heathrow Airport.

  • 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.

Top tips for finding cheap flights to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $560 or less one-way and $871 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

 
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
Alaska AirlinesOverall score based on 12841 reviews
7.8Comfort
7.0Entertainment
8.5Crew
8.1Boarding
7.0Food
Airline reviews

We were bumped from first class to coach. We paid for first class. It was not a promo or points upgrade. We have to file an appeal instead of immediate refund.

4.0 OkayAnonymous, Aug 2026
Read more Alaska Airlines reviews

We were bumped from first class to coach. We paid for first class. It was not a promo or points upgrade. We have to file an appeal instead of immediate refund.

Employees are always helpful and professional. The flight was 30 minutes delayed but everything else went seemlessly.

Boarded us on a plane that had ongoing maintenance and it was 105 degrees out. Sat in the cooking heat for an hour before taking off. WiFi didn’t work over half the flight so I couldn’t get any work done

Awful. Flights were delayed due to FAA which is out of your control I understand, but the communication was awful. Kept getting further and further delayed and then a different flight that was supposed to take off after ours actually took off before us. One of the employees was super rude, too.

Customer service at Juneau was great but the handling of our luggage was very poor at Seattle after a delayed flight due to maintenance causing us to miss our connecting flight. We had frozen goods and they told us they would put it the freezer but didn’t. We lost 250lbs of halibut & salmon

late flight, no wifi, no entertainment, no snack. What are you coming to????

I lost a bag in the process of getting home and I’m a little stressed about it

The delays were the real problem. The crew and staff were amazing and kept us informed and taken care of but what should have been a 6 hour flight with 1.5 hour wait ended up being a 13 hour day in the airport and in the plane waiting to board then waiting for takeoff. Great flight once we got in the air. Pilots and flight crew were awesome 😎.

It was a 3 plus hour flight. By hour 2 my butt was really sore! Loved having wi-fi for the whole trip!

Flight boarded super late. Missed our departure window. Stuck on the runway for over an hour.

The plane was a rather tired 737-800, with old style small luggage bins. Poor air flow. USB charger in the infotainment system was not functioning. The flight was 2 hours late due to crew rest requirements (not their fault). On arrival in Seattle, waited on the tarmac for 30 minutes with very few updates from the crew.

One of the restrooms didn’t work. The ones that did never got replenished. Flight attendant just sitting there on their phone. No notification that the bathroom was broken so long lines. Apathetic crew.

I am in a wheelchair The gate agent knew exactly how to boarding A wheelchair first also the flight attendant knew exactly what she was doing

They did everything right and everything happened right on time.

Not really a “Delta” problem but worth mentioning: Boarding was a difficult process. TSA seemed understaffed and Pre-Check took longer than regular TSA. The supervisor was frazzled and yelled at travelers. Once through TSA, we had to put our carry-ons through another x-ray machine. Then queue up to board with both boarding pass and ID. Then, when we got to the stairs on the tarmac, we had to show our boarding pass again. Maybe this is just normal for Kona since the terminal is outdoors (but still a “secured” area).

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Much better than I expected. I had an economy ticket so I was really happy the flight was so comfy and the service so generous. Passengers were all polite too.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

It was fine. 55 minute flight. No snacks or beverage service offered. Boarding went smoothly and my walker was waiting for me on the jet way.

Entertainment was good. The crew members were professional. Food needs to get better. My stomach was upset after dinner.

Lounge was top notch h with great variety of food and drinks. Cabin crew were great. Smooth flight.

My seat 3G did not go down fully and the buttons were not working properly

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

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

Unfortunately delayed 2 hrs due to faulty tyre.. which had to be changed, but better safe than sorry.

Security area in terminal 3 needs to be made much nicer. Less claustrophobic and use of glass and big ceilings wouldhelp

accomodating check in staff, friendly flight crew ( a crew member was speaking tactlessly and was overfamiliar with passengers

Seats need to be updated. Allowance needs to be made for dinner service at an alternative time

The crew should demonstrate flexibility by moving a screaming infant to its own seat with 1 parent

If I could fly Virgin Atlantic airlines to every place, I need to go, I would. Leaving Heathrow through the special virgin air entrance, security is completely white glove service. I love this airline. From ticketing agents to flight staff everyone tries to make it a wonderful & happy flight experience. I wish other airlines copied the positive culture of Virgin Airlines.

There were no places to sit at the gate. Most people had to sit on the floor or stand waiting for the gate to open and board. We were told we needed passport and the person hardly looked at them. Maybe for 2 seconds. No announcement made asking to board by row or group. On a 5.5 hour flight the crew only came through the cabin 2 times offering water and buy everything else. For the price of the ticket at least offer free soda! The airliner was very comfortable

Crew was wonderful. I knew going in that the seats were not lie-flat in business class, but they reclined less than I expected. To save on waste, you have to ask for which pieces of the amenity kit you are interested in, which they will gladly give to you. Flight was fairly short, so no issues. I did have one piece of luggage not show up at terminal on landing. They were great about looking for it. Found it...it actually did make the flight and was listed as "not picked up" (?????--we stayed over an hour looking for it, including in the odd-sized baggage claim.) Since "not picked up" they will not ship to my house and I have to go back to airport, which is in another town. I probably could have pressed this issue, but headed back to airport for another flight anyway, so will pick up then.

The ticket was reserved in my name but not paid for by underpricer. Alaska airlines was unable to issue my ticket (could not connect the ticket with the PNR) due to an error with underpricer and I spent the better part of 2 hours at the ticket counter trying to rectify.

The Icelandair crew was so kind!!! Thank you for making my first trip to Paris a great one!

I am not going to fillo this out for each leg of my trip. My first review holds for the experience

They wouldn’t check in my luggage even though I had one checked bag prepaid. So I took my bag to the gate and tried to check it in there and two employees scolded me for bringing a large bag to the gate. I told them I was trying to check it in and that it was prepaid, and they said they couldn’t guarantee that it would arrive at my destination but they finally let me drop it off when boarding the plane and pick it up right after exiting the plane. There was no food, and there was no entertainment.

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

One of the worst airlines I ever flew. Boarding is a disaster, they are always late, the planes are overly crowded. Everyone on my flight lost their connection because they were 2h late. Reykjavik is also not the best airport out there.

Flight was delayed. They did a terrible job rebooking me. Agent on the ground was useless. The partner airline who ran the plane was able to help me but Iceland air was useless

Flight delayed Delay to the gate upon arrival Baggage took more than an hour so we missed our connecting!!! Terrible experience!

Crew members were thorough in checking seatbelts and whatnot which makes me feel cared for because passenger safety is a main concern.

Smooth flight. The seats were comfortable but the reclining mechanism didn't work very well. My wife's seat required the flight attendant to push the seat forward while she pushed the button. The leg support didn't want to return to its home under the seat. I ordered the diabetic meal which was full of carbs. It was low in sugar but carbs turn into sugar so was it really diabetic? Overall the flight was pleasant, long but pleasant.

The crew was very nice and pleasant. We were very reluctant to book our flight with British Airlines because we had bad experience with their flight attendants on the previous trips, they were rude and not helpful.

Adequate to good experience. Comfort was mediocre but everything else was good..

Boarding was poor. Why are first class passengers not boarded first?! Bus to the plane and then held on a packed bus because we were waiting for people on the bus before to finish boarding. Seat belt on the fist clas seat is very uncomfortable, cutting into your neck. Other than that crew, seating and food were all excellent. Entertainment, as usual - rubbish.

Had a very bad experience flying out of London. Our initial flight was cancelled without notice and the next flight had a layover of 8 extra hours. Me, my husband and my 8-year-old were already sick, and this further added to our problems. We paid extra for the seats: I was not even given our chosen seats which we paid for months before the trip. We were shoved into the available seats which were middle ones in the back (we had paid for front window, aisle, aisle). The seats were so uncomfortable and getting out of middle seats every so often (with a sick child) was a task. We had initially chosen British Airways because of the short layover, however, that went out of the window. Although unexpected things happen all the time and I understand customers have to adjust for the unplanned, however, how the airlines react and make the passengers comfortable during that time is the real test. We were not given any compensation for food or any arrangement to stay comfortable during that time. In fact, our paid seats were taken away as well.

Crew very helpful and friendly. Food is so so. Main meal is not always the best. Did have a choice of a snack part way which was either a cookie, corn snack, or similar. Second kind of meal was basically like a pizza pastry that really wasn’t a favorite but probably a European snack? Screens and selections of movies, tv and such were good. No WI-Fi unless you buy so no free texting or such on the long flight but I think that might be any overseas flight.

Please make sure the number of seats matches the number of overhead bins and passengers don't carry on more than one bag.

British airways keeps canceling our flights. I won’t be booking any future flights with them

Flight to Seattle was fine. We were delayed getting into our gate. The connection time was short and they make you go through security again which was slow.

Traveling to a place near Seattle?

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Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle