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 June 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.

$396 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

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:20 pm - 8:35 pm

SEA

BHD

16h 15m

1 stop

8:35 pm - 11:35 am

BHD

SEA

23h 00m

1 stop

$885British Airways

Mon, Oct 5 - Thu, Oct 22

8:20 pm - 6:45 pm

SEA

BHD

14h 25m

1 stop

8:10 pm - 11:35 am

BHD

SEA

23h 25m

1 stop

$903British Airways

Sun, Oct 4 - Sun, Oct 18

7:00 pm - 11:20 pm

SEA

BFS

20h 20m

3 stops

7:00 am - 9:40 am

BFS

SEA

34h 40m

3 stops

$905Multiple Airlines

Tue, Aug 18 - Tue, Aug 25

3:10 pm - 3:30 pm

SEA

BHD

16h 20m

2 stops

6:30 am - 11:35 am

BHD

SEA

13h 05m

1 stop

$906American Airlines

Mon, Oct 5 - Thu, Oct 22

6:15 am - 10:30 am

SEA

BHD

20h 15m

2 stops

8:10 pm - 11:35 am

BHD

SEA

23h 25m

1 stop

$907British Airways

Sun, Oct 4 - Sun, Oct 18

8:11 am - 10:15 am

SEA

BHD

18h 04m

2 stops

12:10 pm - 4:55 pm

BHD

SEA

12h 45m

1 stop

$908British Airways

Wed, Nov 11 - Sun, Nov 15

9:45 pm - 12:15 pm

SEA

BFS

30h 30m

1 stop

7:35 pm - 5:10 pm

BFS

SEA

29h 35m

2 stops

$908Multiple Airlines

Sun, Oct 4 - Sun, Oct 18

11:34 am - 3:30 pm

SEA

BHD

19h 56m

2 stops

12:45 pm - 12:14 am

BHD

SEA

19h 29m

2 stops

$918British Airways

Mon, Oct 5 - Thu, Oct 22

9:45 pm - 12:15 pm

SEA

BFS

30h 30m

1 stop

7:35 pm - 6:55 pm

BFS

SEA

31h 20m

1 stop

$958Multiple Airlines

Sun, Oct 4 - Sun, Oct 18

6:15 am - 10:30 am

SEA

BHD

20h 15m

2 stops

7:10 pm - 8:15 pm

BHD

SEA

33h 05m

2 stops

$977British Airways

Sun, Oct 4 - Sun, Oct 18

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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

Oct 5

SEA8:20 pmSeattle/Tacoma Intl

16h 15m

1 stop

BHD8:35 pmBelfast City

Oct 22

BHD8:35 pmBelfast City

23h 00m

1 stop

SEA11:35 amSeattle/Tacoma Intl

$885

British Airways

Oct 4

SEA8:20 pmSeattle/Tacoma Intl

14h 25m

1 stop

BHD6:45 pmBelfast City

Oct 18

BHD8:10 pmBelfast City

23h 25m

1 stop

SEA11:35 amSeattle/Tacoma Intl

$903

British Airways

Oct 4

SEA6:15 amSeattle/Tacoma Intl

20h 15m

2 stops

BHD10:30 amBelfast City

Oct 18

BHD8:10 pmBelfast City

23h 25m

1 stop

SEA11:35 amSeattle/Tacoma Intl

$907

KLM flights from Seattle to Northern Ireland

Our best KLM deals on Seattle to Northern Ireland flight tickets

KLM

Jul 25

SEA5:40 pmSeattle/Tacoma Intl

31h 40m

1 stop

BHD9:20 amBelfast City

Aug 1

BHD5:30 pmBelfast City

26h 07m

1 stop

SEA11:37 amSeattle/Tacoma Intl

$1,184

KLM

Jul 15

SEA9:05 amSeattle/Tacoma Intl

16h 15m

2 stops

BHD9:20 amBelfast City

Jul 18

BHD9:50 amBelfast City

17h 12m

2 stops

SEA7:02 pmSeattle/Tacoma Intl

$8,419

KLM

Jul 15

SEA9:05 amSeattle/Tacoma Intl

16h 15m

2 stops

BHD9:20 amBelfast City

Jul 18

BHD9:50 amBelfast City

17h 12m

2 stops

SEA7:02 pmSeattle/Tacoma Intl

$8,420

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

8:20 pm-8:35 pm

1 stop16h 15m

Belfast City

Thu 10/22

8:35 pm-11:35 am

1 stop23h 00m

$885

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 10/4

8:20 pm-6:45 pm

1 stop14h 25m

Belfast City

Sun 10/18

8:10 pm-11:35 am

1 stop23h 25m

$903

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Tue 8/18

7:00 pm-11:20 pm

3 stops20h 20m

Belfast Intl

Tue 8/25

7:00 am-9:40 am

3 stops34h 40m

$905

Quickest round-trip

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

3:10 pm-3:30 pm

2 stops16h 20m

Belfast City

Thu 10/22

6:30 am-11:35 am

1 stop13h 05m

$906

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 10/4

6:15 am-10:30 am

2 stops20h 15m

Belfast City

Sun 10/18

8:10 pm-11:35 am

1 stop23h 25m

$907

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 11/11

8:11 am-10:15 am

2 stops18h 04m

Belfast City

Sun 11/15

12:10 pm-4:55 pm

1 stop12h 45m

$908

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Sun 10/4

9:45 pm-12:15 pm

1 stop30h 30m

Belfast Intl

Sun 10/18

7:35 pm-5:10 pm

2 stops29h 35m

$908

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

11:34 am-3:30 pm

2 stops19h 56m

Belfast City

Thu 10/22

12:45 pm-12:14 am

2 stops19h 29m

$918

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Sun 10/4

9:45 pm-12:15 pm

1 stop30h 30m

Belfast Intl

Sun 10/18

7:35 pm-6:55 pm

1 stop31h 20m

$958

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 10/4

6:15 am-10:30 am

2 stops20h 15m

Belfast City

Sun 10/18

7:10 pm-8:15 pm

2 stops33h 05m

$977

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Northern Ireland

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Seattle/Tacoma Intl to Northern Ireland?

British Airways, Delta, and KLM are the most popular carriers operating from Seattle/Tacoma Intl to Northern Ireland

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	13h 50m
Direct flights	None

The fastest flight from Seattle to Northern Ireland takes 13h 50m

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 June 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 $807	Free Cancellation	Rating 6.7 8,082 reviews		Search British Airways flights

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.