$627 Find Cheap Flights from Seattle to Belfast

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Belfast 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 Belfast

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Belfast, 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 Seattle to Belfast, 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
$627
British Airways
Sat 3/7Wed 3/18
SEA - BHD • 1 stop
Cheapest one-way
Multiple Airlines
Sat 1/31
SEA - BF1 • multi-stop
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We hope you love your trip to Belfast!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Belfast (SEA-BHD)

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

Sat, Mar 7 - Wed, Mar 18
British Airways Logo
1:35 pm - 2:15 pm
SEA
-
BHD
16h 40m
1 stop
British Airways Logo
6:35 am - 5:55 pm
BHD
-
SEA
18h 20m
1 stop
$627British Airways
Wed, Mar 4 - Sun, Mar 8
British Airways Logo
6:50 pm - 4:35 pm
SEA
-
BHD
13h 45m
1 stop
British Airways Logo
8:25 pm - 5:55 pm
BHD
-
SEA
28h 30m
1 stop
$630British Airways
Sat, Mar 7 - Tue, Mar 17
British Airways Logo
1:35 pm - 11:10 am
SEA
-
BHD
13h 35m
1 stop
British Airways Logo
10:00 am - 12:24 am
BHD
-
SEA
21h 24m
2 stops
$631British Airways
Wed, Mar 4 - Sun, Mar 8
British Airways Logo
6:50 pm - 7:10 pm
SEA
-
BHD
16h 20m
1 stop
British Airways Logo
3:10 pm - 5:55 pm
BHD
-
SEA
33h 45m
1 stop
$632British Airways
Wed, Feb 25 - Sun, Mar 1
British Airways Logo
6:50 pm - 4:35 pm
SEA
-
BHD
13h 45m
1 stop
British Airways Logo
3:10 pm - 4:55 pm
BHD
-
SEA
33h 45m
1 stop
$733British Airways
Fri, Apr 24 - Sun, May 3
British Airways Logo
8:20 pm - 6:10 pm
SEA
-
BHD
13h 50m
1 stop
British Airways Logo
8:10 pm - 11:35 am
BHD
-
SEA
23h 25m
1 stop
$738British Airways
Fri, Apr 24 - Sun, May 3
British Airways Logo
1:29 pm - 3:30 pm
SEA
-
BHD
18h 01m
2 stops
British Airways Logo
8:10 pm - 11:35 am
BHD
-
SEA
23h 25m
1 stop
$742British Airways
Fri, Apr 24 - Sun, May 3
British Airways Logo
1:29 pm - 3:30 pm
SEA
-
BHD
18h 01m
2 stops
British Airways Logo
6:30 am - 10:26 pm
BHD
-
SEA
23h 56m
2 stops
$745British Airways
Sat, Mar 7 - Tue, Mar 17
Delta Logo
7:10 am - 4:50 pm
SEA
-
BHD
25h 40m
2 stops
Delta Logo
6:30 am - 6:58 pm
BHD
-
SEA
19h 28m
2 stops
$767Delta
Mon, Mar 16 - Mon, Mar 23
Multiple Airlines Logo
3:00 pm - 4:45 pm
SEA
-
BFS
18h 45m
2 stops
Multiple Airlines Logo
12:40 pm - 1:10 pm
BFS
-
SEA
31h 30m
2 stops
$776Multiple Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Belfast flights

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

How much is a round-trip flight from Seattle to Belfast?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Belfast departing in March.
Find deals

Good to know

Cheapest flight$627
Flight from Seattle to Belfast City Airport

When to book flights from Seattle to Belfast

Are your dates flexible? Find out the best times to travel from Seattle to Belfast 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 Seattle to Belfast

  • What is the cheapest flight from Seattle to Belfast?

    In the last 3 days, the lowest price for a flight from Seattle to Belfast was $627 for a round-trip ticket.

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

    Yes, you’ll need a passport to travel to Belfast from Seattle.

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

    Seattle is served by only 1 airport and there are 2 airports in Belfast. You will leave Seattle from Seattle/Tacoma Intl and you will be arriving in Belfast at one of these airports: Belfast Intl or Belfast City.

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

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

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

    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 Belfast.

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

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

    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 Belfast with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Belfast?

    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 Belfast from Seattle 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 Seattle to Belfast

Information on your arrival and departure airports

Seattle (SEA)