$423 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

Sat, Oct 3 - Thu, Oct 8
Multiple Airlines Logo
9:30 am - 6:52 pmLHR  London Heathrow-SEA Seattle/Tacoma Intl
17h 22m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl
Multiple Airlines Logo
10:50 am - 11:50 amSEA  Seattle/Tacoma Intl-LHR London Heathrow
17h 00m2 stops Vancouver Intl Toronto Pearson Intl
$599Multiple Airlines
Mon, Sep 21 - Tue, Sep 29
Multiple Airlines Logo
12:05 pm - 11:26 pmLHR  London Heathrow-SEA Seattle/Tacoma Intl
19h 21m2 stops Toronto Pearson Intl San Francisco
Multiple Airlines Logo
5:50 am - 6:30 amSEA  Seattle/Tacoma Intl-LHR London Heathrow
16h 40m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl
$599Multiple Airlines
Fri, Oct 2 - Mon, Oct 5
Delta Logo
8:25 am - 4:35 pmLCY  London City-SEA Seattle/Tacoma Intl
16h 10m1 stop Amsterdam Schiphol
Delta Logo
5:45 pm - 4:40 pmSEA  Seattle/Tacoma Intl-LCY London City
14h 55m1 stop Amsterdam Schiphol
$603Delta
Mon, Oct 5 - Sun, Oct 18
Virgin Atlantic Logo
8:25 am - 4:35 pmLCY  London City-SEA Seattle/Tacoma Intl
16h 10m1 stop Amsterdam Schiphol
Virgin Atlantic Logo
6:00 am - 7:55 amSEA  Seattle/Tacoma Intl-LCY London City
17h 55m2 stops Detroit Metropolitan Wayne County Amsterdam Schiphol
$603Virgin Atlantic
Mon, Sep 21 - Sun, Oct 4
KLM Logo
9:20 am - 4:35 pmLCY  London City-SEA Seattle/Tacoma Intl
15h 15m1 stop Amsterdam Schiphol
KLM Logo
1:45 pm - 9:30 amSEA  Seattle/Tacoma Intl-LCY London City
11h 45m1 stop Amsterdam Schiphol
$603KLM
Mon, Oct 5 - Sun, Oct 18
KLM Logo
9:20 am - 4:35 pmLCY  London City-SEA Seattle/Tacoma Intl
15h 15m1 stop Amsterdam Schiphol
KLM Logo
1:45 pm - 9:30 amSEA  Seattle/Tacoma Intl-LCY London City
11h 45m1 stop Amsterdam Schiphol
$603KLM
Mon, Dec 21 - Sun, Dec 27
Alaska Airlines Logo
2:45 pm - 4:50 pmLHR  London Heathrow-SEA Seattle/Tacoma Intl
10h 05mnonstop
Alaska Airlines Logo
6:55 pm - 12:20 pmSEA  Seattle/Tacoma Intl-LHR London Heathrow
9h 25mnonstop
$604Alaska Airlines
Mon, Nov 23 - Wed, Dec 2
Virgin Atlantic Logo
7:45 am - 11:00 pmLCY  London City-SEA Seattle/Tacoma Intl
23h 15m2 stops Amsterdam Schiphol New York John F Kennedy Intl
Virgin Atlantic Logo
2:35 pm - 4:35 pmSEA  Seattle/Tacoma Intl-LCY London City
18h 00m1 stop Amsterdam Schiphol
$608Virgin Atlantic
Thu, Dec 17 - Sat, Jan 9
Delta Logo
8:40 am - 10:00 pmLCY  London City-SEA Seattle/Tacoma Intl
21h 20m2 stops Amsterdam Schiphol Las Vegas Harry Reid Intl
Delta Logo
6:05 am - 1:15 pmSEA  Seattle/Tacoma Intl-LCY London City
23h 10m2 stops Minneapolis St Paul Amsterdam Schiphol
$610Delta
Fri, Dec 18 - Sun, Dec 27
Alaska Airlines Logo
2:45 pm - 4:50 pmLHR  London Heathrow-SEA Seattle/Tacoma Intl
10h 05mnonstop
Alaska Airlines Logo
6:55 pm - 12:20 pmSEA  Seattle/Tacoma Intl-LHR London Heathrow
9h 25mnonstop
$626Alaska Airlines
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 $599 return. The most popular connection is from London to Seattle and KAYAK users have found round-trip deals for as low as $599 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 $848. On the other hand, the most expensive day to fly is Friday, where round-trip prices are $925 on average.

What is the cheapest month to fly to Seattle?

The cheapest month for flights to Seattle is February, where tickets cost $669 on average for return flights. On the other hand, the most expensive months are July and December, where the average cost of tickets from the United Kingdom is $879 and $872 respectively. For one-way flights, the best month to travel is November with an average price of $623.

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 $807 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 $911.

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 $626 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 25% 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

$423
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly with an average 11% 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 $599 return. The most popular connection is from London to Seattle and KAYAK users have found round-trip deals for as low as $599 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 $709. The cheapest price found on KAYAK in the last 2 weeks cost $500 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 $528 or less one-way and $626 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 12900 reviews
8.5Crew
7.8Comfort
7.0Food
8.1Boarding
7.0Entertainment
Airline reviews

This was the best flight I’ve ever been on- solely for the purpose that our pilot gave us a tour of the west coast. He didn’t need to do that but he did and it made the experience spectacular. Well done.

10.0 ExcellentLauren, Sep 2026
Read more Alaska Airlines reviews

This was the best flight I’ve ever been on- solely for the purpose that our pilot gave us a tour of the west coast. He didn’t need to do that but he did and it made the experience spectacular. Well done.

Apparently you could not have food unless you ordered ahead. This was not obvious ahead of time. What we saw given to others on the plane also appeared too be quite meager.

Seat didn’t recline at all- very uncomfortable after three hours

In flight service flight attendants did wonderful job.Airlines could have done better with snacks,since it was early morning flight breakfast places where not open so people could not grab anything quick for breakfast.I hope they would keep that in mind.

Be able to buy food while on the plane, not just in advance. Should be able to watch TV on entertainment screens on backs of chairs

I paid extra to choose a seat. When arriving at the gate after a very stressful check in at the airport, realized did not get the chosen seat that I PAID for. When I called the airline I was told I did not pay to choose a seat and could not be refunded, but I DID pay extra to choose a seat. And of course, got stuck in a MIDDLE seat. Since the seats are now crammed together, this is especially uncomfortable. The check in for baggage was ridiculous, it was a mile long and the kiosk to check in for the flight was very confusing. We finally sought out help and a very rude representative quickly went through the kiosk and printed a boarding pass that did not provide the PAID for chosen seat. Didn't get to get on the return flight because the flight coming in was delayed several hours, missed the flight by 3 minutes!!!!!!! You really can't hold the door for 3 minutes for a passenger you KNOW you are waiting for??? What stress and had to wait 4 MORE HOURS to get a flight home because you could not keep the door open 3 minutes. 3 minutes. Had only 20 minutes to get from flight to connecting flight and was accused of taking too long to get from gate to gate in Chicago. Flights were delayed all day long coming in and going out, you would think you could wait 3 minutes to allow passengers to get to the connecting flights. HUGE inconvenience, stressful and makes for a really LONG day when the flight leaving Des Moines to Chicago was horribly delayed, already had a horrible experience and missed the connecting flight by 3 minutes. 3 minutes. Airplane was still there, the door closed, why on earth is it such a huge deal to wait a few minutes when flights were already delayed ALL DAY LONG and why is it such a huge deal to REOPEN the door to let another passenger on??!! I used to like Alaska Airlines. I just plain hate flying in general now. The airlines have 0 (zero)care about the people buying tickets and making travel plans and how stressful flying is now. Zero care.

The flight was completed within the expected timeframe and the staff were nice. Main complaints were the WiFi was almost non-functional and not worth the $8 they were charging and one of the bathrooms seemed like it was falling apart, which makes me wonder how good the maintenance and safety is.

this is my second time flying with them and for the second time I missed my connecting flight due to their airline. The first time this happened they accommodated me the second time they made me sleep 14 hours in the airport because they told me this time it was air, traffic controls fault, and not theirs so they cannot accommodate me.

I liked the flight. What could be done better is that airplanes should seat the passengers from back to front and not front to back.

Service OK except could not make out much of what the pilot said when making announcements. Wish they would have had seat back screens. Charging ports were conveniently located. Overall very average experience. Far from the best, but I've had worse.

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.

It was amazing. I sat in First Class as a Saga Premium member, and my service was top notch. It was wonderful. I only recently joined Saga Club since I do travel to Scandinavia often and enjoy flying through Reykjavik on Iceland Air versus other ways of travelling to Europe. This was my first trip sitting in first class, which I honestly wasn’t expecting!

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

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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