$342 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 5/26. 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
Booking Insights
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
1:30 pm - 12:55 pm
SEA
-
BHD
15h 25m
1 stop
British Airways Logo
12:45 pm - 6:25 pm
BHD
-
SEA
13h 40m
1 stop
$885British Airways
Mon, Oct 5 - Thu, Oct 22
British Airways Logo
8:20 pm - 8:35 pm
SEA
-
BHD
16h 15m
1 stop
British Airways Logo
6:30 am - 11:35 am
BHD
-
SEA
13h 05m
1 stop
$886British Airways
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, Oct 5 - Thu, Oct 22
Multiple Airlines Logo
3:10 pm - 3:30 pm
SEA
-
BHD
16h 20m
2 stops
Multiple Airlines Logo
9:35 am - 6:25 pm
BHD
-
SEA
16h 50m
1 stop
$908Multiple Airlines
Mon, Oct 5 - Thu, Oct 22
British Airways Logo
11:34 am - 12:55 pm
SEA
-
BHD
17h 21m
2 stops
British Airways Logo
6:30 am - 6:25 pm
BHD
-
SEA
19h 55m
1 stop
$909British Airways
Mon, Oct 5 - Thu, Oct 22
British Airways Logo
11:34 am - 12:55 pm
SEA
-
BHD
17h 21m
2 stops
British Airways Logo
12:45 pm - 6:25 pm
BHD
-
SEA
13h 40m
1 stop
$912British Airways
Mon, Oct 5 - Thu, Oct 22
Multiple Airlines Logo
3:10 pm - 3:30 pm
SEA
-
BHD
16h 20m
2 stops
Multiple Airlines Logo
6:30 am - 7:30 pm
BHD
-
SEA
21h 00m
2 stops
$918Multiple Airlines
Mon, Oct 5 - Thu, Oct 22
Multiple Airlines Logo
3:10 pm - 3:30 pm
SEA
-
BHD
16h 20m
2 stops
Multiple Airlines Logo
6:30 am - 7:30 pm
BHD
-
SEA
21h 00m
2 stops
$919Multiple Airlines
Mon, Oct 5 - Thu, Oct 22
Multiple Airlines Logo
3:10 pm - 3:30 pm
SEA
-
BHD
16h 20m
2 stops
Multiple Airlines Logo
6:30 am - 7:30 pm
BHD
-
SEA
21h 00m
2 stops
$922Multiple Airlines
Wed, Aug 5 - Tue, Aug 25
British Airways Logo
1:30 pm - 1:35 pm
SEA
-
BHD
16h 05m
1 stop
British Airways Logo
6:20 pm - 11:35 am
BHD
-
SEA
25h 15m
1 stop
$934British Airways
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.

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

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 Northern Ireland departing in May.

Good to know

Low seasonOctober
Cheapest flight$342
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly with an average 3% 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.

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 7871 reviews
6.8Comfort
6.9Boarding
7.7Crew
6.4Food
6.4Entertainment
Airline reviews

Nice aircraft. Good crew. Delayed departure from Houston, but arrived on time in London. Main thing I don’t like about flying BA is having to transit through security in London Heathrow. A major pain!

8.0 ExcellentCharles, Apr 2026
IAH - LHR
Read more British Airways reviews

Nice aircraft. Good crew. Delayed departure from Houston, but arrived on time in London. Main thing I don’t like about flying BA is having to transit through security in London Heathrow. A major pain!

The gate agent made me check my carry-on in Denver, even though I've traveled all over taking this case on the plane. Beware folks. Food in Premium Economy was quite good - excellent blanket! Flight attendants on the Heathrow-to-Budapest flight on 3-27-2026 were quite snappy. I got a frown when asked to unscrew the water bottle cap for me (I had a cast on my right arm). Also woke up right when they were handing out biscuits. She had given my rowmates one and was in the process of giving water when I asked for a biscuit. She scolded me and said, "You snooze, you lose". She did give me one, but I thought that comment was uncalled for.

Wish the food and overall service was better. They treat Business class passengers same as economy

WiFi wasn’t available to economy until the end of the flight.

Very good staff members with sincere passion and responsibility in their job.

Very please with the seating that the Kayak staff booked for us!

Worth every penny to upgrade to BC. Treated and felt more like First Class

Good service, food and comfort in World Traveller Plus. Entertainment was poor - no wifi on the way out and barely working on the way back. Not a great choice of entertainment on the seat back tv.

They had us seating down for one hour just waiting on the plane

Flying with BA is always a good experience—even in economy class. It is better if in business and first class. Timely, breeze through security and timely connections

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

Information on your arrival and departure airports