$784 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 12/3. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 20% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Useful Info
Flights Deals

Best Northern Ireland Flight Deals from Seattle

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Belfast
Belfast1 stop$784
Belfast
Belfast1 stop$784

Cheap Flights from Seattle to Northern Ireland

 
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

Wed, Dec 3 - Sun, Dec 7
British Airways Logo
6:50 pm - 4:35 pmSEA-BHD
13h 45m1 stop
British Airways Logo
6:30 am - 4:55 pmBHD-SEA
18h 25m1 stop
$784British Airways
Find Deal
Wed, Dec 3 - Sun, Dec 7
Delta Logo
3:00 pm - 9:00 pmSEA-BHD
22h 00m1 stop
Delta Logo
6:30 am - 11:50 amBHD-SEA
13h 20m1 stop
$859Delta
Find Deal
Wed, Dec 3 - Sun, Dec 7
Delta Logo
7:20 am - 9:00 pmSEA-BHD
29h 40m2 stops
Delta Logo
6:30 am - 11:50 amBHD-SEA
13h 20m1 stop
$864Delta
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 - 10:16 pmBHD-SEA
36h 56m2 stops
$874Delta
Find Deal
Fri, Aug 15 - Fri, Aug 22
 Logo
3:45 pm - 4:40 pmSEA-BFS
16h 55m2 stops
 Logo
9:50 am - 8:40 pmBFS-SEA
18h 50m2 stops
Sun, Nov 23 - Sun, Nov 30
 Logo
3:40 pm - 4:50 pmSEA-BHD
17h 10m2 stops
 Logo
9:10 am - 7:16 pmBHD-SEA
18h 06m2 stops
Wed, Dec 3 - Sun, Dec 7
British Airways Logo
6:50 pm - 7:10 pmSEA-BHD
16h 20m1 stop
British Airways Logo
9:10 am - 6:20 pmBHD-SEA
17h 10m2 stops
$972British Airways
Find Deal
Wed, Dec 3 - Sun, Dec 7
British Airways Logo
11:45 am - 2:15 pmSEA-BHD
18h 30m2 stops
British Airways Logo
9:10 am - 6:20 pmBHD-SEA
17h 10m2 stops
$976British Airways
Find Deal
Sun, Nov 23 - Sun, Nov 30
British Airways Logo
11:45 am - 1:15 pmSEA-BHD
17h 30m2 stops
British Airways Logo
8:25 pm - 4:55 pmBHD-SEA
28h 30m1 stop
$978British Airways
Find Deal
Fri, Jul 18 - Fri, Jul 25
KLM Logo
5:35 pm - 9:15 pmSEA-BHD
19h 40m1 stop
KLM Logo
5:25 pm - 3:50 pmBHD-SEA
30h 25m1 stop
$1,149KLM
Find Deal
Useful Info

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 ($784) and Delta ($859).


Good to know

Low seasonMarch
High seasonJuly
Cheapest flight$784
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly with an average 21% 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.
6.6
British AirwaysOverall score based on 7089 reviews
7.6Crew
6.8Boarding
6.7Comfort
6.3Food
6.4Entertainment
Airline reviews

Flight was good but seat in 12D was not comfortable, better on the Airbus 321 from Tampa to Charlotte. No breakfast was served before landing in zLonfon only a coffee and orange juice.

6.0 GoodAnonymous, Jun 2025CLT - LHR
Read more British Airways reviews

Flight was good but seat in 12D was not comfortable, better on the Airbus 321 from Tampa to Charlotte. No breakfast was served before landing in zLonfon only a coffee and orange juice.

I was transferred to an American Airlines flight. The boarding was late and unorganized. The seating was extremely tight and uncomfortable. Will not use AA again.

The entertainment selection was ok, but overall not bad! The crew was great.

Good crew and boarding process. Horrible food and one of the most uncomfortable aircraft seats I have ever sat in. The cabin temperature was warm which made it hard for my family to sleep.

The check-in of my luggage was terrible. When purchased my tickets, one luggage and one carry-on was part of the fight. My flight was switched from British to American Airline. During check-in of luggage at the airport, I was denied and had to pay extra $75. How do I get reimbursed for this extra luggage payment?

More Indian vegetarian food options would have been better Availability of seat selection free of charge 72 hours before departure would be great

This was the second time on BA, food terrible, bathrooms gross,( granted, that was mostly due to the disgusting children urinating all over it)boarding was late and disorganized. No gate issued until last minute st Heathrow, bad system, caused undue stress. Seats were painful, that's what you get for traveling like a poor in economy, right BA? Should have been able to afford business or first class if you want to actually be able to walk upright without back pain after a trip.

This was the second time on BA, food terrible, bathrooms gross, boarding late and disorganized. No gate issued until last minute st Heathrow, bad system, caused undue stress.

The flight was delayed twice and because of that, we missed our connecting flight. British Airways then attempted to put us on the last flight to Milan from London which would have kept us in the airport for 12 hours. We had to speak to several levels of bureaucracy until BA management let us fly on a flight that only kept us in the airport for two hours. If there was an earlier flight, why weren’t we put on that flight from the start? Unacceptable behavior from what was once my favorite carrier.

The payment system was not working so was unable to connect wifi the entire flight

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.