How do I get Price Alerts for flights from Seattle to Northern Ireland?

You can take advantage of momondo’s Price Alerts by first searching for your flights to Seattle from Northern Ireland . Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

How can I save money on flights from Seattle to Northern Ireland with momondo?

Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore” . Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

How does momondo find its flight prices?

We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Northern Ireland?

Prices for flights from Seattle/Tacoma Intl Airport to Northern Ireland are updated daily.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Northern Ireland?

As of August 2026, there is 1 operator available to choose from for flights from Seattle/Tacoma Intl Airport to Northern Ireland.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Northern Ireland?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Northern Ireland.

What documentation or ID do you need to fly to Northern Ireland?

The necessary travel and health documents for your Northern Ireland trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$914 Cheap Flights from Seattle to Northern Ireland in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Northern Ireland

Round-trip

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:45 pm - 6:40 pmSEA Seattle/Tacoma Intl-BHD Belfast City

15h 55m1 stop London Heathrow

9:15 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

15h 35m1 stop London Heathrow

$908British Airways

Sun, Nov 15 - Wed, Nov 18

3:40 pm - 9:00 pmSEA Seattle/Tacoma Intl-BFS Belfast Intl

21h 20m2 stops Reykjavik Keflavik Intl Glasgow Intl

9:55 am - 8:40 pmBFS Belfast Intl-SEA Seattle/Tacoma Intl

18h 45m2 stops London Gatwick Reykjavik Keflavik Intl

$914Multiple Airlines

Sun, Sep 27 - Sun, Oct 4

6:45 pm - 6:50 pmSEA Seattle/Tacoma Intl-BHD Belfast City

16h 05m1 stop London Heathrow

9:15 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

15h 35m1 stop London Heathrow

$918British Airways

Sun, Nov 15 - Wed, Nov 18

1:30 pm - 12:55 pmSEA Seattle/Tacoma Intl-BHD Belfast City

15h 25m1 stop London Heathrow

12:45 pm - 6:25 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 40m1 stop London Heathrow

$946British Airways

Mon, Oct 5 - Thu, Oct 22

8:20 pm - 7:25 pmSEA Seattle/Tacoma Intl-BHD Belfast City

15h 05m1 stop London Heathrow

12:45 pm - 6:25 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 40m1 stop London Heathrow

$946British Airways

Mon, Oct 5 - Thu, Oct 22

8:20 pm - 7:25 pmSEA Seattle/Tacoma Intl-BHD Belfast City

15h 05m1 stop London Heathrow

12:45 pm - 6:25 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 40m1 stop London Heathrow

$955British Airways

Mon, Oct 5 - Thu, Oct 22

8:20 pm - 7:25 pmSEA Seattle/Tacoma Intl-BHD Belfast City

15h 05m1 stop London Heathrow

12:45 pm - 6:25 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 40m1 stop London Heathrow

$956British Airways

Mon, Oct 5 - Thu, Oct 22

3:40 pm - 9:00 pmSEA Seattle/Tacoma Intl-BFS Belfast Intl

21h 20m2 stops Reykjavik Keflavik Intl Glasgow Intl

10:10 pm - 5:55 pmBFS Belfast Intl-SEA Seattle/Tacoma Intl

27h 45m3 stops Manchester Oslo Gardermoen Reykjavik Keflavik Intl

$961Multiple Airlines

Sun, Sep 27 - Sun, Oct 4

10:31 am - 12:55 pmSEA Seattle/Tacoma Intl-BHD Belfast City

18h 24m2 stops Chicago O'Hare Intl London Heathrow

2:20 pm - 11:35 amBHD Belfast City-SEA Seattle/Tacoma Intl

29h 15m1 stop London Heathrow

$971American Airlines

Mon, Oct 5 - Thu, Oct 22

3:14 pm - 3:30 pmSEA Seattle/Tacoma Intl-BHD Belfast City

16h 16m2 stops Chicago O'Hare Intl London Heathrow

2:20 pm - 11:35 amBHD Belfast City-SEA Seattle/Tacoma Intl

29h 15m1 stop London Heathrow

$971American Airlines

Mon, Oct 5 - Thu, Oct 22

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British Airways flights from Seattle to Northern Ireland

Our best British Airways deals on Seattle to Northern Ireland flight tickets

British Airways

Nov 15

SEA6:45 pmSeattle/Tacoma Intl

15h 55m

1 stop

BHD6:40 pmBelfast City

Nov 18

BHD9:15 amBelfast City

15h 35m

1 stop

SEA4:50 pmSeattle/Tacoma Intl

$908

British Airways

Nov 15

SEA6:45 pmSeattle/Tacoma Intl

16h 05m

1 stop

BHD6:50 pmBelfast City

Nov 18

BHD9:15 amBelfast City

15h 35m

1 stop

SEA4:50 pmSeattle/Tacoma Intl

$918

British Airways

Oct 5

SEA8:20 pmSeattle/Tacoma Intl

15h 05m

1 stop

BHD7:25 pmBelfast City

Oct 22

BHD12:45 pmBelfast City

13h 40m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

$946

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sun 11/15

6:45 pm-6:40 pm

1 stop15h 55m

Belfast City

Wed 11/18

9:15 am-4:50 pm

1 stop15h 35m

$908

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Sun 9/27

3:40 pm-9:00 pm

2 stops21h 20m

Belfast Intl

Sun 10/4

9:55 am-8:40 pm

2 stops18h 45m

$914

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sun 11/15

6:45 pm-6:50 pm

1 stop16h 05m

Belfast City

Wed 11/18

9:15 am-4:50 pm

1 stop15h 35m

$918

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 10/5

1:30 pm-12:55 pm

1 stop15h 25m

Belfast City

Thu 10/22

12:45 pm-6:25 pm

1 stop13h 40m

$946

Quickest round-trip

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 10/5

8:20 pm-7:25 pm

1 stop15h 05m

Belfast City

Thu 10/22

12:45 pm-6:25 pm

1 stop13h 40m

$946

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 10/5

8:20 pm-7:25 pm

1 stop15h 05m

Belfast City

Thu 10/22

12:45 pm-6:25 pm

1 stop13h 40m

$955

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 10/5

8:20 pm-7:25 pm

1 stop15h 05m

Belfast City

Thu 10/22

12:45 pm-6:25 pm

1 stop13h 40m

$956

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Sun 9/27

3:40 pm-9:00 pm

2 stops21h 20m

Belfast Intl

Sun 10/4

10:10 pm-5:55 pm

3 stops27h 45m

$961

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 10/5

10:31 am-12:55 pm

2 stops18h 24m

Belfast City

Thu 10/22

2:20 pm-11:35 am

1 stop29h 15m

$971

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 10/5

3:14 pm-3:30 pm

2 stops16h 16m

Belfast City

Thu 10/22

2:20 pm-11:35 am

1 stop29h 15m

$971

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

Cheap Seattle to Northern Ireland flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Northern Ireland

Fastest flight time	14h 05m
Direct flights	None

The fastest flight from Seattle to Northern Ireland takes 14h 05m

There are no direct flights from Seattle to Northern Ireland. There are no popular flight routes from Seattle to Northern Ireland.

Search flight deals

Frequently asked questions about flying from Seattle to Northern Ireland

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Northern Ireland?
Prices for flights from Seattle/Tacoma Intl Airport to Northern Ireland are updated daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Northern Ireland?
As of August 2026, there is 1 operator available to choose from for flights from Seattle/Tacoma Intl Airport to Northern Ireland.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Northern Ireland?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Northern Ireland.
What documentation or ID do you need to fly to Northern Ireland?
The necessary travel and health documents for your Northern Ireland trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Seattle to Northern Ireland

Compare and see reviews for airlines that fly from Seattle to Northern Ireland with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $822	Free Cancellation	Rating 6.7 8,161 reviews		Search British Airways flights

Frequently asked questions about flying from Seattle to Northern Ireland

How do I get Price Alerts for flights from Seattle to Northern Ireland?
You can take advantage of momondo’s Price Alerts by first searching for your flights to Seattle from Northern Ireland. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.
How can I save money on flights from Seattle to Northern Ireland with momondo?
Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.
How does momondo find its flight prices?
We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Northern Ireland?

Finding the right flight to Northern Ireland from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Northern Ireland quick and easy, saving you time and money.

Can I find flights from Seattle to Northern Ireland with flexible booking policies on momondo?

Flights from Seattle to Northern Ireland with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seattle to Northern Ireland?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Northern Ireland.

I’m not ready to book a flight from Seattle to Northern Ireland right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Seattle to Northern Ireland flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.