$438 Find Cheap Flights from Belfast 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 from Belfast to Seattle departing on 5/3. 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 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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$799
Multiple Airlines
Thu 5/7Thu 5/14
BFS - SEA • 2 stops
Cheapest one-way
$438
Multiple Airlines
Sun 5/3
BFS - SEA • 3 stops
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We hope you love your trip to Seattle!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Belfast to Seattle

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

Thu, May 7 - Thu, May 14
Multiple Airlines Logo
6:10 am - 5:55 pm
BFS
-
SEA
19h 45m
2 stops
Multiple Airlines Logo
7:00 pm - 8:35 pm
SEA
-
BFS
17h 35m
2 stops
$799Multiple Airlines
Wed, Apr 22 - Sun, Apr 26
British Airways Logo
10:05 am - 6:25 pm
BHD
-
SEA
16h 20m
1 stop
British Airways Logo
1:19 pm - 5:40 pm
SEA
-
BHD
20h 21m
2 stops
$969British Airways
Wed, Apr 22 - Sun, Apr 26
British Airways Logo
10:05 am - 6:25 pm
BHD
-
SEA
16h 20m
1 stop
British Airways Logo
8:20 pm - 6:45 pm
SEA
-
BHD
14h 25m
1 stop
$972British Airways
Wed, May 6 - Sun, May 10
British Airways Logo
11:35 am - 12:36 am
BHD
-
SEA
21h 01m
2 stops
British Airways Logo
8:20 pm - 8:35 pm
SEA
-
BHD
16h 15m
1 stop
$975British Airways
Fri, Sep 11 - Mon, Sep 14
British Airways Logo
9:35 am - 5:29 pm
BHD
-
SEA
39h 54m
2 stops
British Airways Logo
6:24 am - 12:55 pm
SEA
-
BHD
22h 31m
2 stops
$977British Airways
Wed, Apr 22 - Sun, Apr 26
British Airways Logo
11:35 am - 6:25 pm
BHD
-
SEA
14h 50m
1 stop
British Airways Logo
8:20 pm - 8:50 am
SEA
-
BHD
28h 30m
1 stop
$979British Airways
Fri, May 8 - Tue, May 12
British Airways Logo
6:30 am - 11:35 am
BHD
-
SEA
13h 05m
1 stop
British Airways Logo
1:30 pm - 7:40 pm
SEA
-
BHD
22h 10m
1 stop
$982British Airways
Fri, May 8 - Tue, May 12
British Airways Logo
7:35 pm - 10:38 pm
BHD
-
SEA
35h 03m
2 stops
British Airways Logo
1:30 pm - 3:20 pm
SEA
-
BHD
17h 50m
1 stop
$987British Airways
Wed, Apr 22 - Sun, Apr 26
British Airways Logo
10:05 am - 10:47 pm
BHD
-
SEA
20h 42m
2 stops
British Airways Logo
1:30 pm - 1:25 pm
SEA
-
BHD
15h 55m
1 stop
$988British Airways
Wed, Aug 5 - Sun, Aug 16
Multiple Airlines Logo
8:30 am - 5:15 pm
BFS
-
SEA
40h 45m
3 stops
Multiple Airlines Logo
7:10 pm - 9:30 pm
SEA
-
BFS
18h 20m
2 stops
$1,207Multiple Airlines
Booking Insights

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 round-trip tickets from Belfast to Seattle were found on British Airways ($969) and KLM ($1,539).

Find deals

Good to know

Cheapest flight$438
Flight from Belfast Intl 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 round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 $438 for a one-way ticket and $799 for a round-trip.

  • Do I need a passport to fly between Belfast and Seattle?

    Yes

  • 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.

  • 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 round-trip 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.

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

Information on your arrival and departure airports

Seattle (SEA)