$350 Find Cheap Flights from Seattle to Northern Ireland

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 Northern Ireland departing on 12/13. 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 Northern Ireland

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

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Belfast
Belfast1 stop$703
Belfast
Belfast1 stop$703

Book Cheap Seattle to Northern Ireland 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 Northern Ireland 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 Northern Ireland

Sat, Mar 7 - Tue, Mar 17
Finnair Logo
1:35 pm - 2:15 pmSEA-BHD
16h 40m1 stop
Finnair Logo
11:25 am - 5:55 pmBHD-SEA
13h 30m1 stop
$703Finnair
Find Deal
Sat, Mar 7 - Tue, Mar 17
Finnair Logo
1:35 pm - 2:15 pmSEA-BHD
16h 40m1 stop
Finnair Logo
11:25 am - 5:55 pmBHD-SEA
13h 30m1 stop
$704Finnair
Find Deal
Sat, Mar 7 - Tue, Mar 17
Multiple Airlines Logo
1:35 pm - 2:15 pmSEA-BHD
16h 40m1 stop
Multiple Airlines Logo
11:25 am - 12:49 amBHD-SEA
20h 24m2 stops
$714Multiple Airlines
Find Deal
Sat, Mar 7 - Tue, Mar 17
Multiple Airlines Logo
1:35 pm - 2:15 pmSEA-BHD
16h 40m1 stop
Multiple Airlines Logo
11:25 am - 12:49 amBHD-SEA
20h 24m2 stops
$715Multiple Airlines
Find Deal
Sat, Mar 7 - Wed, Mar 18
British Airways Logo
1:35 pm - 11:10 amSEA-BHD
13h 35m1 stop
British Airways Logo
11:25 am - 12:49 amBHD-SEA
20h 24m2 stops
$716British Airways
Find Deal
Sat, Mar 7 - Wed, Mar 18
British Airways Logo
1:35 pm - 2:15 pmSEA-BHD
16h 40m1 stop
British Airways Logo
11:25 am - 12:49 amBHD-SEA
20h 24m2 stops
$717British Airways
Find Deal
Sat, Mar 7 - Tue, Mar 17
British Airways Logo
1:34 pm - 2:15 pmSEA-BHD
16h 41m2 stops
British Airways Logo
6:35 am - 11:08 pmBHD-SEA
23h 33m2 stops
$722British Airways
Find Deal
Fri, Oct 3 - Fri, Oct 10
Delta Logo
12:45 pm - 4:55 pmSEA-BHD
20h 10m2 stops
Delta Logo
6:30 am - 4:05 pmBHD-SEA
17h 35m1 stop
$726Delta
Find Deal
Wed, Dec 3 - Sun, Dec 7
Delta Logo
7:20 am - 4:50 pmSEA-BHD
25h 30m2 stops
Delta Logo
5:20 pm - 7:58 pmBHD-SEA
34h 38m2 stops
$736Delta
Find Deal
Fri, Oct 3 - Fri, Oct 10
American Airlines Logo
3:00 pm - 6:15 pmSEA-BHD
19h 15m2 stops
American Airlines Logo
11:55 am - 10:56 pmBHD-SEA
19h 01m2 stops
$757American Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Seattle to Northern Ireland flights

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

Which airlines provide the cheapest flights from Seattle to Northern Ireland?

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 Seattle to Northern Ireland were found on Finnair ($703) and British Airways ($716).

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Good to know

Low seasonMarch
Cheapest flight$350
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly with an average 23% increase in price.
Flight from Seattle to Belfast Intl Airport

FAQs - booking Northern Ireland flights

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

    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 Northern Ireland.

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

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

    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 Northern Ireland 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 Northern Ireland?

    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 Northern Ireland 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 Northern Ireland?

    The cheapest time of day to fly to Northern Ireland is generally in the afternoon, when round-trip flights cost $794 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to Northern Ireland is generally in the evening, which is peak travel time and where the average cost of a ticket is $1,000.

Reviews of the top airline flying from Seattle to Northern Ireland

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Northern Ireland. 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 Seattle to Northern Ireland? 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.
6.7
British AirwaysOverall score based on 7367 reviews
7.6Crew
6.4Entertainment
6.9Boarding
6.3Food
6.7Comfort
Airline reviews

The seating has become ridiculous… like a contest to see how narrow and short they can be made- forcing anyone over 5’1 to pay more to not be twisting oneself into a pretzel. Really insane- would have thought BA was better than this. Frankly- it cancels out a lot of the positive aspects.

4.0 OkayAnonymous, Sep 2025BOS - LHR
Read more British Airways reviews

The seating has become ridiculous… like a contest to see how narrow and short they can be made- forcing anyone over 5’1 to pay more to not be twisting oneself into a pretzel. Really insane- would have thought BA was better than this. Frankly- it cancels out a lot of the positive aspects.

flight was delayed from BWI to London - missed my connecting flight & then connecting flight (also British Air) was delayed - food is awful, TV & movie selection is great

Super tight economy class. My knees were hitting the back of seat in front of me (I'm only 5'6"). My small backpack (sized according to their required dimensions) would not fit under the seat in front of me because there is a box (is that the life jacket?) in the way. Over all, extremely uncomfortable. I forgive the tasteless food, but the tight seating was torture

Didn’t fly with them as someone had cancelled my flight

Online check-in 24 hours in advance something seems not so easy to check in to pick seats and to print a boarding pass

I like the crew, very welcoming. Food can be better. The seat arms don’t go up so. I could use the empty seat next to mine to relax better. 3hrs delay 😠

The flight was very delayed in taking off - which was out of control of the crew, but then the pilot worked hard so we only arrived about 30 minutes late. Everyone was very friendly and accommodating!

Boarding was efficient and quick, crew was very attentive, seats were comfortable.

Everything was very good! I personally struggled with the heat in the cabin for the first 2 hours

Very caring crew on board. Didn’t have dinner as I was sleeping. Was seating in the emergency row so I had comfortable leg room

Everything you need to know for your flight from Seattle to Northern Ireland

Information on your arrival and departure airports

Seattle (SEA)

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