SEA

£603 Find Cheap Flights from Belfast to Seattle

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Belfast to Seattle departing on 30/8. 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

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 in flight searches from Belfast to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Belfast to Seattle, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Belfast to Seattle

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Belfast 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 return flight deals from Belfast to Seattle

Sat, 30 Aug - Thu, 11 Sep
KLM Logo
06:30 - 15:55BHD-SEA
17h 25m1 stop
KLM Logo
14:10 - 16:55SEA-BHD
18h 45m1 stop
£603KLM
Find Deal
Sat, 30 Aug - Thu, 11 Sep
KLM Logo
06:30 - 14:45BHD-SEA
16h 15m2 stops
KLM Logo
14:10 - 21:15SEA-BHD
23h 05m1 stop
£608KLM
Find Deal
Sat, 30 Aug - Thu, 11 Sep
Virgin Atlantic Logo
06:30 - 18:55BHD-SEA
20h 25m2 stops
Virgin Atlantic Logo
09:25 - 16:55SEA-BHD
23h 30m2 stops
£619Virgin Atlantic
Find Deal
Sat, 30 Aug - Fri, 12 Sep
 Logo
06:30 - 15:55BHD-SEA
17h 25m1 stop
 Logo
17:40 - 16:55SEA-BHD
15h 15m1 stop
Sat, 30 Aug - Fri, 12 Sep
 Logo
06:30 - 14:45BHD-SEA
16h 15m2 stops
 Logo
17:40 - 16:55SEA-BHD
15h 15m1 stop
Sat, 30 Aug - Fri, 12 Sep
KLM Logo
06:30 - 14:45BHD-SEA
16h 15m2 stops
KLM Logo
18:45 - 21:15SEA-BHD
18h 30m2 stops
£667KLM
Find Deal
Sun, 24 Aug - Sun, 31 Aug
 Logo
22:40 - 20:28BFS-SEA
29h 48m3 stops
 Logo
15:45 - 23:20SEA-BFS
23h 35m3 stops
Sun, 24 Aug - Sun, 31 Aug
 Logo
15:55 - 13:50BFS-SEA
29h 55m2 stops
 Logo
16:00 - 22:20SEA-BFS
22h 20m2 stops
Sat, 30 Aug - Wed, 10 Sep
British Airways Logo
19:00 - 20:02BHD-SEA
33h 02m2 stops
British Airways Logo
10:11 - 13:30SEA-BHD
19h 19m2 stops
£724British Airways
Find Deal
Sat, 30 Aug - Wed, 10 Sep
British Airways Logo
19:00 - 11:30BHD-SEA
24h 30m1 stop
British Airways Logo
10:11 - 11:55SEA-BHD
17h 44m2 stops
£739British Airways
Find Deal
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KAYAK's insights & trends for Belfast to Seattle flights

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

Which airlines provide the cheapest flights from Belfast to Seattle?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest return tickets from Belfast to Seattle were found on KLM (£603) and Virgin Atlantic (£619).


Good to know - Cheap tickets from Belfast to Seattle

Cheapest flight£603
Flight from Belfast City Airport to Seattle

When to book flights from Belfast to Seattle

Are your dates flexible? Find out the best times to travel from Belfast to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Belfast to Seattle

  • What is the cheapest flight from Belfast to Seattle?

    In the last 3 days, the lowest price for a flight from Belfast to Seattle was £1,316 for a one-way ticket and £820 for a return.

  • Which airports will I be using when flying from Belfast to Seattle?

    There are 2 airports in Belfast (Belfast Intl and Belfast City.) and only 1 airport in Seattle (Seattle/Tacoma Intl). The cheapest flights are generally found on the Belfast City Airport to Seattle/Tacoma Intl flight route.

  • Which aircraft models fly most regularly from Belfast to Seattle?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Belfast to Seattle?

    oneworld, and SkyTeam are the airline alliances operating flights between Belfast and Seattle, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Belfast 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 from Belfast to Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Belfast 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 Belfast to Seattle?

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

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Belfast 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 from Belfast up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Belfast to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Belfast to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Belfast 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.
6.6
British AirwaysOverall score based on 7109 reviews
6.3Food
7.6Crew
6.4Entertainment
6.9Boarding
6.7Comfort
Airline reviews

3/4 bags delayed and 1/4 damaged at the other end. Flight was freezing

8.0 ExcellentDavid, Jul 2025LHR - JFK
Read more British Airways reviews

3/4 bags delayed and 1/4 damaged at the other end. Flight was freezing

The crew were good. The flight was on time. The entertainment choice was ok. But the food was bad, tasted and texture were awful.

After boarding we were waiting in the plane for more than one hour to take off without AC with very high temperature inside

The flight was an hour late leaving Heathrow. The food was mediocre. When we got to Austin, my husband’s luggage was missing. He filled out information at baggage claim. We are waiting to hear something. His name is Henry Jacob Braunig.

The food was very good and it came multiple times

Flight from LGW to JFK delayed by 4 hrs No explanation given until the pilot said the delay due to planned maintenance on the aircraft

We arrived late to London, and consequently were 5 min. late to be allowed through security for our next flight. Even though dozens of people missed the same flight, BA did not radio ahead to hold open security for an extra 5-10 min. to allow people to get on the flight. This caused an additional 6 hour delay in London after waiting over an hour in Customer Service to get rebooked. They did not have enough staff on hand to help people in a timely manner. Not at all happy with the BA's customer care or customer service.

All service prior to the flight was terrible: online check-in not working, no customer service tel,, multiple airport scanners not working, A huge mess.

CONSTANT ERROR MESSAGE THAT THE WIFI COULD NOT BE PURCHASED DUE TO INABILITY TO CONNECT PAYMENT SYSTEM VIA SATELLITE. THIS HAPPENED IN BOTH DIRECTIONS. THE MAIN REASON I TRAVEL IN PRIORITY IS TO BE ABLE TO WORK FOR WHICH I NEED ACCESS TO INTERNET. .

They lost my luggage. Lady who was helping with it in Austin was rude. Not very helpful!

Everything you need to know for your flight from Belfast to Seattle

Information on your arrival and departure airports

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