$721 Find Cheap Flights from Seattle to Northern Ireland

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 Northern Ireland departing on 9/28. 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$721
Belfast
Belfast1 stop$721

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

Sun, Sep 28 - Tue, Oct 7
British Airways Logo
1:30 pm - 1:05 pmSEA-BHD
15h 35m1 stop
British Airways Logo
8:20 pm - 11:35 amBHD-SEA
23h 15m1 stop
$721British Airways
Find Deal
Sun, Sep 28 - Mon, Oct 13
British Airways Logo
1:30 pm - 11:30 amSEA-BHD
14h 00m1 stop
British Airways Logo
6:30 pm - 11:10 amBHD-SEA
24h 40m1 stop
$733British Airways
Find Deal
Wed, Oct 29 - Wed, Nov 5
British Airways Logo
7:50 pm - 4:35 pmSEA-BHD
13h 45m1 stop
British Airways Logo
7:25 pm - 4:55 pmBHD-SEA
29h 30m1 stop
$751British Airways
Find Deal
Sun, Sep 28 - Mon, Oct 13
Virgin Atlantic Logo
7:45 am - 4:55 pmSEA-BHD
25h 10m2 stops
Virgin Atlantic Logo
5:25 pm - 4:05 pmBHD-SEA
30h 40m1 stop
$778Virgin Atlantic
Find Deal
Sun, Sep 28 - Tue, Oct 7
Delta Logo
9:40 am - 4:55 pmSEA-BHD
23h 15m2 stops
Delta Logo
6:30 am - 4:10 pmBHD-SEA
17h 40m2 stops
$832Delta
Find Deal
Fri, Oct 31 - Sat, Nov 8
American Airlines Logo
2:52 pm - 2:15 pmSEA-BHD
16h 23m2 stops
American Airlines Logo
11:35 am - 11:18 pmBHD-SEA
19h 43m2 stops
$844American Airlines
Find Deal
Wed, Dec 3 - Sun, Dec 7
Delta Logo
7:20 am - 9:00 pmSEA-BHD
29h 40m2 stops
Delta Logo
5:20 pm - 11:50 amBHD-SEA
26h 30m1 stop
$871Delta
Find Deal
Fri, Oct 31 - Sat, Nov 8
 Logo
3:35 pm - 9:00 pmSEA-BHD
22h 25m3 stops
 Logo
6:00 pm - 5:00 pmBHD-SEA
31h 00m3 stops
Wed, Dec 3 - Sun, Dec 7
Virgin Atlantic Logo
11:15 am - 9:00 pmSEA-BHD
25h 45m2 stops
Virgin Atlantic Logo
6:30 am - 11:50 amBHD-SEA
13h 20m1 stop
$909Virgin Atlantic
Find Deal
Fri, Oct 31 - Sat, Nov 8
 Logo
7:50 pm - 8:50 amSEA-BFS
30h 00m1 stop
 Logo
11:10 pm - 10:25 amBFS-SEA
43h 15m2 stops
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 British Airways ($721) and Virgin Atlantic ($778).

Good to know

Low seasonMarch
Cheapest flight$721
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 26% increase in price.
Flight from Seattle to Belfast City 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 7289 reviews
6.4Entertainment
6.3Food
7.6Crew
6.9Boarding
6.7Comfort
Airline reviews

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

8.0 ExcellentAnonymous, Aug 2025JFK - LHR
Read more British Airways reviews

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

Had a nice little suite although I couldn’t close the door (but I didn’t ask anyone to help). 5K is a nice seat and very private (you look in on first class). Enjoyable flight and nice crew.

There was a slight delay. Otherwise, everything else was satisfactory.

Although the crew were great and the good nice, I might as well have been on Ryanair for the amount of space I had. Not good enough BA. I’d rather pay more and not feel like a human sardine.

Love the A380 - loads of room. Headphone socket on my seat didn’t work. Sounds like a trivial issue? Well when flying long-haul the in-flight entertainment is what keeps you going so when it doesn’t work it’s a disaster. Pay attention to the details please BA. Spoiled what was otherwise an excellent flight with the usual brilliant crew.

Crew were fantastic can’t fault them at all. Couldn’t do enough for us

Crying baby the ENTIRE flight. Not your fault, but I paid 2700 for a premium economy ticket and it wasn't worth it. should have just stuck with coach. flight attendants very mediocre - minimal effort. Plane didn't seem very clean. Didn't have any cleansing wipes - most airlines give you this when you board. Flat screen scrolling didn't work. Toiletry case a joke - why bother at all?

The overall seat and cushion needs to be updated. It was hard and no support. My butt was numb for most of the flight. The food was subpar at best being in premium economy cost. The flight attendants were excellent and attentive during the whole flight. Disappointed I had to select our seats 24 hours prior.

I enjoyed the comfort of Premium Economy. The Purser on London-Nairobi was a little testy, snappish in his tone. I understand stressed, tired, etc but his tone in addressing passengers I found wanting.

Very good crew. The seating in economy plus was excellent, and I slept most of the way. The diabetic meal that I requested was almost tasteless--about a 2 on a ten-point scale.--so I ate little. And why bother serving dinner to fliers at midnight?! I had eaten a meal at the airport six hours earlier. A good breakfast would be better.

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

Information on your arrival and departure airports

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