$210 Find Cheap Flights from Seattle to the United Kingdom

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to the United Kingdom departing on 4/22. 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.
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Cheap Flights from Seattle to the United Kingdom

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
London
London1 stop$550
Edinburgh
Edinburgh1 stop$491
Manchester
Manchester1 stop$498
Birmingham
Birmingham1 stop$622
Belfast
Belfast1 stop$601
Inverness
Inverness1 stop$511
Bristol
Bristol1 stop$769
Aberdeen
Aberdeen1 stop$593
Leeds
Leeds2 stops$645
Liverpool
Liverpool2 stops$813
Cardiff
Cardiff2 stops$749
Newquay
Newquay3 stops$881
Darlington
Darlington1 stop$1,111
London
London1 stop$550
Edinburgh
Edinburgh1 stop$491
Manchester
Manchester1 stop$498
Birmingham
Birmingham1 stop$622
Belfast
Belfast1 stop$601
Inverness
Inverness1 stop$511
Bristol
Bristol1 stop$769
Aberdeen
Aberdeen1 stop$593
Leeds
Leeds2 stops$645
Liverpool
Liverpool2 stops$813
Cardiff
Cardiff2 stops$749
Newquay
Newquay3 stops$881
Darlington
Darlington1 stop$1,111

Book Cheap Seattle to the United Kingdom Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to the United Kingdom 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 Seattle to the United Kingdom

Tue, Feb 3 - Thu, Feb 12
Icelandair Logo
2:35 pm - 9:55 am
SEA
-
GLA
11h 20m1 stop
Icelandair Logo
11:15 am - 5:00 pm
GLA
-
SEA
13h 45m1 stop
$476Icelandair
Mon, Feb 16 - Mon, Feb 23
Icelandair Logo
2:35 pm - 9:55 am
SEA
-
GLA
11h 20m1 stop
Icelandair Logo
12:35 pm - 5:00 pm
GLA
-
SEA
12h 25m1 stop
$491Icelandair
Mon, Feb 9 - Tue, Feb 17
Icelandair Logo
2:35 pm - 10:00 am
SEA
-
EDI
11h 25m1 stop
Icelandair Logo
11:00 am - 5:00 pm
EDI
-
SEA
14h 00m1 stop
$491Icelandair
Sat, Jan 24 - Tue, Feb 17
Icelandair Logo
2:35 pm - 9:55 am
SEA
-
GLA
11h 20m1 stop
Icelandair Logo
12:35 pm - 5:00 pm
GLA
-
SEA
12h 25m1 stop
$493Icelandair
Wed, Feb 18 - Fri, Mar 6
British Airways Logo
6:50 pm - 6:35 pm
SEA
-
EDI
15h 45m1 stop
British Airways Logo
6:05 am - 11:30 am
EDI
-
SEA
13h 25m1 stop
$588British Airways
Sat, Feb 7 - Sat, Feb 14
British Airways Logo
1:35 pm - 10:45 am
SEA
-
GLA
13h 10m1 stop
British Airways Logo
10:30 am - 4:55 pm
GLA
-
SEA
14h 25m1 stop
$590British Airways
Mon, Feb 16 - Mon, Feb 23
Virgin Atlantic Logo
3:05 pm - 10:00 pm
SEA
-
MAN
22h 55m1 stop
Virgin Atlantic Logo
5:50 am - 11:40 am
MAN
-
SEA
13h 50m1 stop
$601Virgin Atlantic
Sat, Mar 7 - Tue, Mar 17
American Airlines Logo
7:15 am - 11:10 am
SEA
-
BHD
19h 55m2 stops
American Airlines Logo
10:00 am - 11:04 pm
BHD
-
SEA
20h 04m2 stops
$639American Airlines
Mon, Feb 16 - Mon, Feb 23
Virgin Atlantic Logo
3:05 pm - 7:35 pm
SEA
-
LCY
20h 30m1 stop
Virgin Atlantic Logo
8:05 pm - 11:40 am
LCY
-
SEA
23h 35m1 stop
$652Virgin Atlantic
Sat, Mar 7 - Wed, Mar 18
Delta Logo
9:50 am - 4:50 pm
SEA
-
BHD
23h 00m2 stops
Delta Logo
6:30 am - 5:09 pm
BHD
-
SEA
17h 39m2 stops
$662Delta
Booking Insights

KAYAK's insights & trends for Seattle to the United Kingdom flights

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

What is the cheapest Seattle to the United Kingdom flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to the United Kingdom from Seattle found in the last 72 hours was to London, at $482 round-trip. The most popular route is from Seattle (SEA) to London Heathrow Airport (LHR), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $482.

Can I save money by flying with a layover from Seattle to the United Kingdom?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $773, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Seattle to the United Kingdom?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to the United Kingdom, 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 from Seattle to the United Kingdom is November, when tickets cost $643 (return) on average. On the other hand, the most expensive months are June and December, when the average cost of round-trip tickets is $998 and $987 respectively.

What’s the cheapest day of the week to fly from Seattle to United Kingdom?

The average price of all round-trip flights from Seattle to the United Kingdom clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to United Kingdom on a Wednesday and more expensive on a Friday. On your return trip to Seattle, you should consider flying back on a Wednesday, and avoid Fridays for better deals.

How far in advance should I book a flight from Seattle to the United Kingdom?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to the United Kingdom, 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 on the flight from Seattle to the United Kingdom, you should book around 3 weeks before departure, which saves you about 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$212
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Seattle to Manchester

Flights from Seattle to the United Kingdom: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Seattle to the United Kingdom 
Verified travelerFlew with British Airways
SEA
-
LHR
Apr 2025
Make sure you have plenty of time between flights if you are delayed.
Verified travelerFlew with British Airways
SEA
-
LHR
Feb 2025
Don’t take a flight if you sick, or if you have no choice prepare to stay covered with mask throughout the flight
Verified travelerFlew with British Airways
SEA
-
LHR
Apr 2024
Bring a sack lunch -- airport food was very expensive.

FAQs - booking United Kingdom flights

  • How does KAYAK find such low prices on flights from Seattle to the United Kingdom?

    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 from Seattle to the United Kingdom.

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

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

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

    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 from Seattle to the United Kingdom 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 from Seattle to the United Kingdom?

    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 from Seattle to the United Kingdom 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 the United Kingdom?

    The cheapest time of day to fly to the United Kingdom is generally at night, when round-trip flights cost $829 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to the United Kingdom is generally in the evening, which is peak travel time and where the average cost of a ticket is $842.

Top tips for finding cheap flights to the United Kingdom

  • Looking for a cheap flight? 25% of our users found tickets from Seattle to the following destinations at these prices or less: London $366 one-way - $631 round-trip

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

 
Need help choosing which airline to fly with from Seattle to the United Kingdom? 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 8023 reviews
8.5Crew
7.8Entertainment
7.2Food
7.9Comfort
8.1Boarding
Airline reviews

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

10.0 ExcellentAnonymous, Dec 2025
DCA - SEA
Read more Delta reviews

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

This flight was a first class choice and left much to be desired. Seat backs on seats were falling apart and torn. Seats actually didn't come to a "full & upright position". Pull out table was sprung. Not any significant leg room. All in all we were on an obviously older plane and felt overcharged for what we received as first class.

A 12 hour flight during the day with one real meal service - are you kidding? Also the breakfast was one of the worst and not what was listed

Flight was delayed several times. At one point, they "pulled back" 15 minutes from the delayed boarding and sent a text saying we would board sooner than previously advised. The flight then was delayed again. And when we boarded, there was an unspecified technical issue which had us waiting in the plane for about an hour.

Delta is a good airline. I've never had an issue with Delta. I'll continue to fly with them until they show me that I shouldn't.

The only thing nice I can say is the flight crew was really nice and apologetic about the situation. They shared as much information as they had and advised us on what we could do about missing connecting flights. The boarding process was so slow. The gate agent was working by herself and should have had someone working with her. It took almost an hour to board because she was trying to board a full flight of people and provide customer service to everyone who was flying standby and/or had questions. It was really chaotic. This didn't help the fact that we were delayed and folks were missing connections the longer it took.

The gate attendants and the crew were terrible. Because of high winds, they needed to carry more fuel, so they had to get volunteers to take the next flight at 6 am the next day. They did a terrible job of it - our flight ended up taking off just under 3 hours of the scheduled time. I hope to never fly Delta again.

Did not realize internet screen was hidden between seats and no info printed!!!!

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.

Very good flight crew and very nice people staff were incredible especially the gate agent

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.

Problems checking in both on the laptop and on the app. No free seating available at check-in as advertised - must pay for EVERY seat between $23 and $75. No way to cancel seat choice. App menus and site menus are not responsive, and some items are impossible to find. Crew and mobile assistance are friendly and helpful.

Food - Non-Existent. You pay for everything. It is strictly Pay-to-Play!

Never again. Terrible hospitality and human decency for an international flight. No food, no snacks, no beverages, blankets, pillows, limited entertainment. Tiny seats without any cushion and some do not even recline. I was shocked that they did not charge for seat belts. Never in my life have I witness asking for "spare change" for charity before landing on both legs of the flight. Icelandair can contribute on their own to said, so called, children's charity with the money saved from providing 3 centimeters of tea and water to hungry and dehydrated passengers.

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.

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

It was too cold in the plane my feet froze

Handling our luggage was the biggest issue - they lost it and we got it almost 3 days later. Really threw off the beginning of our trip and we really had to change our itinerary accordingly.

Seat was hard and uncomfortable and the temperature too warm and uncomfortable.

It was good. The air plane is clean and staff were friendly.

Worst airline I’ve ever flown. Delayed 5.5 hrs, missed connecting flight, and missed an entire day of vacation. Zero customer service

Plane delayed due to weather. Plane boarded, then told to unboard due to a maintenance issue.

the seats were so cramped you could barely move. it was difficult to eat when passengers would recline their seats. the seats were so flimsy and unstable that whenever someone got in and out of their seat, it bounced like a spring back in your face. the movies were nice. the food was terrible. even though the conditions were terrible, they tried to pressure passengers to relocate their seats to accommodate adults who were related and wanted to sit next to each other, even after the passengers expressed that they did not want to move for that purpose. on the connecting flight, the “service” consisted of items for purchase. even though the flight was only 45 minutes, once again passengers (including me) were pressured to relocate for people to sit next to each other. they couldn’t be apart for 45 minutes? this was much less compelling than being apart for an 8 hour flight.

Everything went smoothly, and we even arrived 40min earlier than scheduled, on an Orland-Madrid route.

The staff was very nice and helpful. Some of the best crew I have met.

Suddenly, I don't find my flight back on the app Help Ticket 0757345716866 Hoeflich Flight back Sunday ib5333 Ib2629 Ib4268

Was all good.l including a sofdrink. AA improved significantly. There was no entertainment.

I've taken British Airways before and it has been great. On this trip to Spain and Portugal we had two BA flights. On both flights we were taken by bus from the terminal out to the plane on the tarmac. There were many older folks on these flights, and to ask people in their 70s to lug their carry-on and personal items up the long mobile staircase to the plane entrance, is very disturbing. I won't be taking British Airways in the future. Many people on these flights were very unhappy.

The food on the flight was of marginal quality. Small bits of chicken, instant mashed potatoes and some carrots. The rolls were very dry, nearly inedible. The seats were quite small and didn’t allow for any shifting of position during the flight. There was limited leg room.0

The seats are so small that you can barely move at all. Don't try to eat with utensils in your seat either - you will elbow your neighbor in the face. Miserably small and I swear they are shrinking every time I fly. Food was meh (per usual), but at least there is free alcohol on an overseas flight. Doesn't make up for sitting in a torture chamber while hurtling through the air with hundreds of fussy people, but it's something. Entertainment options (movies, shows) are okay, nothing special, but at least there are screens, because most of the seats in these large planes do not have adjustable lighting - or air control - that you can get to, it's too high to reach - which makes reading impossible. Zero stars, AA.

Terrible customer service. I booked business class and the counter agent didn’t bother asking me about any choice or preferred seat, basically assigned me that last seat and couldn’t even answer if it was a business class seat. Also iberia lost my suitcase on my flight from JFK to MAD with the layover in BCN. Useless customer service at the counter. Thank goodness I happened to check the baggage claim area of the next flight in…there it was.

The airline was not clear about a new departure time so we got to the airport early anyway. The flight left early which was great because of weather. The check in process was very easy and staff were friendly and helpful. The crew was great and our flight was very good.

Awful it always is unfortunately is the only way to fly direct to london

I travelled in business class and was disappointed by lack of service, curt and borderline rude time of the crew and to top it off, all of my luggage was delayed. It was like pulling teeth to even report the missing luggage and recover it the next day from the airport.

Boarding was poor. All groups called immediately one after the other resulting in a long queue in the jetty/jet bridge. Seats were very hard and and did not recline on a 4.5 hour flight. No food was available. Plane was cold. There was no entertainment.

The cramped seats are cruel and unusual punishment and may violate the Geneva code.

Check in was was and the agent was very friendly and helpful The lounge was nice...boarding was straight from the lounge Everything worked at our seats, and video entertainment was good ..food was mediocre

The flight was excellent in World Travellor plus. Well worth the extra money. Boarding at Phoenix was the usual poorly organized event. Very stressful.

Although business class, the seating was really cramped. The food was so so.

Smooth trip no turbulence which is always a bonus for me lol! In cattle class so an element of being a bit squished (but not as bad as other shorter haul airlines) smaller plane than the one we flew out on and entertainment system wasn’t as modern but still definitely passed the time. Lovely crew x

Flying on the Boeing 787 from Seattle to London was everything that I expected. Every thing was great.

Everything you need to know for your flight from Seattle to the United Kingdom

Information on your arrival and departure airports