$891 Find Cheap Flights from Belfast to Seattle

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Belfast to Seattle departing on 3/7. 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
$891
British Airways
Sat 3/7Mon 3/9
BHD - SEA • 1 stop
Cheapest one-way
$1,060
American Airlines
Mon 8/3
BHD - SEA • 1 stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
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

Sat, Mar 7 - Mon, Mar 9
British Airways Logo
6:35 am - 11:30 am
BHD
-
SEA
12h 55m
1 stop
British Airways Logo
7:50 pm - 6:35 pm
SEA
-
BHD
15h 45m
1 stop
$891British Airways
Sat, Mar 7 - Mon, Mar 9
British Airways Logo
6:35 am - 11:04 pm
BHD
-
SEA
24h 29m
2 stops
British Airways Logo
7:21 am - 2:15 pm
SEA
-
BHD
23h 54m
2 stops
$896British Airways
Sat, Mar 7 - Mon, Mar 9
British Airways Logo
6:35 am - 11:30 am
BHD
-
SEA
12h 55m
1 stop
British Airways Logo
7:21 am - 10:40 am
SEA
-
BHD
20h 19m
2 stops
$897British Airways
Sat, Mar 7 - Mon, Mar 9
British Airways Logo
6:35 am - 11:30 am
BHD
-
SEA
12h 55m
1 stop
British Airways Logo
7:21 am - 2:15 pm
SEA
-
BHD
23h 54m
2 stops
$898British Airways
Sat, Mar 7 - Mon, Mar 9
British Airways Logo
6:35 am - 11:04 pm
BHD
-
SEA
24h 29m
2 stops
British Airways Logo
7:21 am - 10:40 am
SEA
-
BHD
20h 19m
2 stops
$903British Airways
Sun, Mar 22 - Sun, Mar 29
Multiple Airlines Logo
6:30 am - 10:25 am
BFS
-
SEA
34h 55m
3 stops
Multiple Airlines Logo
3:40 pm - 9:00 pm
SEA
-
BFS
21h 20m
2 stops
$904Multiple Airlines
Sun, Mar 22 - Sun, Mar 29
Multiple Airlines Logo
6:30 am - 10:25 am
BFS
-
SEA
34h 55m
3 stops
Multiple Airlines Logo
3:40 pm - 9:55 pm
SEA
-
BFS
22h 15m
3 stops
$953Multiple Airlines
Thu, Jul 2 - Thu, Jul 16
American Airlines Logo
6:30 am - 8:31 pm
BHD
-
SEA
22h 01m
2 stops
American Airlines Logo
8:20 pm - 7:25 pm
SEA
-
BHD
15h 05m
1 stop
$1,016American Airlines
Sat, Jun 27 - Mon, Jul 13
American Airlines Logo
4:15 pm - 6:25 pm
BHD
-
SEA
34h 10m
1 stop
American Airlines Logo
1:35 pm - 12:55 pm
SEA
-
BHD
15h 20m
1 stop
$1,030American Airlines
Thu, Jul 2 - Thu, Jul 16
American Airlines Logo
6:30 am - 8:31 pm
BHD
-
SEA
22h 01m
2 stops
American Airlines Logo
3:34 pm - 6:45 pm
SEA
-
BHD
19h 11m
2 stops
$1,032American 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 ($891) and American Airlines ($1,016).

Find deals

Good to know

Cheapest flight$891
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 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 $1,060 for a one-way ticket and $891 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)