$296 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 8/17. 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 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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Flight Deals

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

Mon, Oct 5 - Thu, Oct 22
British Airways Logo
8:20 pm - 7:25 pm
SEA
-
BHD
15h 05m
1 stop
British Airways Logo
6:30 am - 11:35 am
BHD
-
SEA
13h 05m
1 stop
$889British Airways
Mon, Aug 31 - Mon, Sep 7
British Airways Logo
8:20 pm - 8:35 pm
SEA
-
BHD
16h 15m
1 stop
British Airways Logo
7:35 pm - 11:35 am
BHD
-
SEA
24h 00m
1 stop
$905British Airways
Mon, Sep 28 - Wed, Sep 30
British Airways Logo
1:30 pm - 12:55 pm
SEA
-
BHD
15h 25m
1 stop
British Airways Logo
4:05 pm - 11:35 am
BHD
-
SEA
27h 30m
1 stop
$908British Airways
Mon, Oct 5 - Thu, Oct 22
American Airlines Logo
3:10 pm - 3:30 pm
SEA
-
BHD
16h 20m
2 stops
American Airlines Logo
2:20 pm - 11:35 am
BHD
-
SEA
29h 15m
1 stop
$910American Airlines
Mon, Oct 5 - Thu, Oct 22
American Airlines Logo
2:12 pm - 3:30 pm
SEA
-
BHD
17h 18m
2 stops
American Airlines Logo
12:45 pm - 12:14 am
BHD
-
SEA
19h 29m
2 stops
$920American Airlines
Sun, Aug 16 - Sun, Aug 23
Multiple Airlines Logo
3:40 pm - 10:50 pm
SEA
-
BFS
23h 10m
3 stops
Multiple Airlines Logo
8:20 pm - 11:45 am
BFS
-
SEA
47h 25m
3 stops
$926Multiple Airlines
Mon, Aug 31 - Mon, Sep 7
Multiple Airlines Logo
7:00 pm - 8:40 pm
SEA
-
BFS
17h 40m
2 stops
Multiple Airlines Logo
9:15 am - 11:45 am
BFS
-
SEA
34h 30m
2 stops
$969Multiple Airlines
Mon, Aug 31 - Mon, Sep 7
Multiple Airlines Logo
9:45 pm - 11:20 pm
SEA
-
BFS
17h 35m
1 stop
Multiple Airlines Logo
6:50 pm - 5:55 pm
BFS
-
SEA
31h 05m
2 stops
$970Multiple Airlines
Mon, Aug 31 - Mon, Sep 7
British Airways Logo
3:47 pm - 7:25 pm
SEA
-
BHD
19h 38m
2 stops
British Airways Logo
6:30 pm - 11:35 am
BHD
-
SEA
25h 05m
1 stop
$981British Airways
Sun, Aug 16 - Sun, Aug 23
KLM Logo
5:45 pm - 9:20 am
SEA
-
BHD
31h 35m
1 stop
KLM Logo
5:30 pm - 4:27 pm
BHD
-
SEA
30h 57m
1 stop
$1,036KLM
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 3 days.

In the past 3 days, the cheapest round-trip tickets from Seattle to Northern Ireland were found on British Airways ($908) and American Airlines ($920).

Find deals

Good to know

Cheapest flight$296
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.

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 8005 reviews
6.4Food
6.9Boarding
6.8Comfort
6.4Entertainment
7.7Crew
Airline reviews

3.5 hr delay leaving Pittsburgh, notifications for which were incomplete and untimely. Connecting flight was automatically switched to one requiring more than a 30 hour layover! After waiting in a long queue, customer service reduced layover to 11 hours and also set up an earlier standby. The standby had empty seats, but the gate agent couldn't change our tickets! On top of all that my luggage was lost and has yet to even be located, much less returned 5 (FIVE!) days later. Too bad there's no rating below poor.

2.0 MediocreA&J, May 2026
PIT - LHR
Read more British Airways reviews

3.5 hr delay leaving Pittsburgh, notifications for which were incomplete and untimely. Connecting flight was automatically switched to one requiring more than a 30 hour layover! After waiting in a long queue, customer service reduced layover to 11 hours and also set up an earlier standby. The standby had empty seats, but the gate agent couldn't change our tickets! On top of all that my luggage was lost and has yet to even be located, much less returned 5 (FIVE!) days later. Too bad there's no rating below poor.

Canceled flight late London to Florence. Help at airport very poor. Treated poorly. Had to sleep in the airport. Lost bags- still do not have them. Horrible. I should be reimbursed!

The seats are extra cramped if you are taller than 5’8! Spring for the extra legroom seats for sure if you have a long flight!

Very disappointed with British Airways. It has been over 24 hours and I still have not received my checked baggage or any proper update. Customer support has been unresponsive, making the situation even more frustrating. Poor baggage handling and lack of communication seriously impacted my travel experience.

Flight was good but temp in the cabin was cold.

I like American Airlines and their safety record. They provide quality service and a feel safe enough to prefer American Airlines over other carriers even if I have to pay a little more.

Cancelled flight and re booked seats were a downgrade. British Airways said the upgrade was t available but when I checked it was but then they wouldn’t make it right

Boarding was orderly, pilot and flight attendants were nice, entertainment options were good, and low sodium meals were quite tasty.

The whole experience was excellent, O can say out from Miami the best airline to travel with for any European destination. Since the ground staff to the inflight crew attention was great, service on board 10 of 10. Finally the 380 is very confortable and nice to travel.

All crew except 1 were excellent. When I asked assistance with business class seat conversion to a bed (not being familiar as never used before but have numerous times with other airlines) crew member helped very reluctantly. I should have told her that business class seat conversion is totally different in each airline such as Delta, New Zealand Air and United. Sorry it was my 1st time with America Airlines. Now I know, I won't bother asking assistance in future.

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

Information on your arrival and departure airports

Seattle (SEA)