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 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.

$264 Cheap Flights from Seattle to Northern Ireland in 2026

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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.

7:00 pm - 9:30 pm

SEA

BFS

18h 30m

3 stops

8:15 pm - 9:40 am

BFS

SEA

45h 25m

3 stops

$774Multiple Airlines

Thu, May 7 - Sat, May 16

7:00 pm - 6:55 pm

SEA

BFS

15h 55m

2 stops

8:15 pm - 9:40 am

BFS

SEA

45h 25m

3 stops

$836Multiple Airlines

Thu, May 7 - Sat, May 16

8:20 pm - 8:35 pm

SEA

BHD

16h 15m

1 stop

7:40 pm - 11:35 am

BHD

SEA

23h 55m

1 stop

$840British Airways

Wed, Sep 2 - Wed, Sep 9

8:20 pm - 5:30 pm

SEA

BHD

13h 10m

1 stop

7:35 pm - 11:35 am

BHD

SEA

24h 00m

1 stop

$868British Airways

Mon, Sep 14 - Mon, Sep 21

6:24 am - 12:55 pm

SEA

BHD

22h 31m

2 stops

7:35 pm - 11:35 am

BHD

SEA

24h 00m

1 stop

$875British Airways

Mon, Sep 14 - Mon, Sep 21

8:20 pm - 8:35 pm

SEA

BHD

16h 15m

1 stop

7:40 pm - 6:49 pm

BHD

SEA

31h 09m

2 stops

$882British Airways

Wed, Sep 2 - Wed, Sep 9

3:40 pm - 9:00 pm

SEA

BFS

21h 20m

3 stops

5:35 pm - 9:08 pm

BFS

SEA

35h 33m

3 stops

$907Multiple Airlines

Wed, May 27 - Mon, Jun 1

7:10 pm - 10:20 pm

SEA

BFS

19h 10m

2 stops

5:35 pm - 9:08 pm

BFS

SEA

35h 33m

3 stops

$910Multiple Airlines

Wed, May 27 - Mon, Jun 1

7:00 pm - 5:05 pm

SEA

BFS

14h 05m

2 stops

7:35 am - 8:40 pm

BFS

SEA

21h 05m

2 stops

$924Multiple Airlines

Wed, May 6 - Wed, May 13

1:32 pm - 1:35 pm

SEA

BHD

16h 03m

2 stops

6:30 am - 5:29 pm

BHD

SEA

18h 59m

2 stops

$943American Airlines

Wed, Sep 2 - Wed, Sep 9

American Airlines flights from Seattle to Northern Ireland

Our best American Airlines deals on Seattle to Northern Ireland flight tickets

American Airlines

Sep 2

SEA1:32 pmSeattle/Tacoma Intl

16h 03m

2 stops

BHD1:35 pmBelfast City

Sep 9

BHD6:30 amBelfast City

18h 59m

2 stops

SEA5:29 pmSeattle/Tacoma Intl

$943

American Airlines

Jul 16

SEA8:20 pmSeattle/Tacoma Intl

15h 05m

1 stop

BHD7:25 pmBelfast City

Jul 26

BHD1:10 pmBelfast City

13h 15m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

$1,198

American Airlines

Apr 2

SEA12:13 amSeattle/Tacoma Intl

33h 57m

2 stops

BHD6:10 pmBelfast City

Apr 11

BHD7:05 amBelfast City

22h 18m

2 stops

SEA9:23 pmSeattle/Tacoma Intl

$1,317

British Airways flights from Seattle to Northern Ireland

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

British Airways

Sep 2

SEA8:20 pmSeattle/Tacoma Intl

16h 15m

1 stop

BHD8:35 pmBelfast City

Sep 9

BHD7:40 pmBelfast City

23h 55m

1 stop

SEA11:35 amSeattle/Tacoma Intl

$840

British Airways

Sep 14

SEA8:20 pmSeattle/Tacoma Intl

13h 10m

1 stop

BHD5:30 pmBelfast City

Sep 21

BHD7:35 pmBelfast City

24h 00m

1 stop

SEA11:35 amSeattle/Tacoma Intl

$868

British Airways

Sep 14

SEA6:24 amSeattle/Tacoma Intl

22h 31m

2 stops

BHD12:55 pmBelfast City

Sep 21

BHD7:35 pmBelfast City

24h 00m

1 stop

SEA11:35 amSeattle/Tacoma Intl

$875

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 5/7

7:00 pm-9:30 pm

3 stops18h 30m

Belfast Intl

Sat 5/16

8:15 pm-9:40 am

3 stops45h 25m

$774

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 5/7

7:00 pm-6:55 pm

2 stops15h 55m

Belfast Intl

Sat 5/16

8:15 pm-9:40 am

3 stops45h 25m

$836

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 9/2

8:20 pm-8:35 pm

1 stop16h 15m

Belfast City

Wed 9/9

7:40 pm-11:35 am

1 stop23h 55m

$840

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 9/14

8:20 pm-5:30 pm

1 stop13h 10m

Belfast City

Mon 9/21

7:35 pm-11:35 am

1 stop24h 00m

$868

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 9/14

6:24 am-12:55 pm

2 stops22h 31m

Belfast City

Mon 9/21

7:35 pm-11:35 am

1 stop24h 00m

$875

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 9/2

8:20 pm-8:35 pm

1 stop16h 15m

Belfast City

Wed 9/9

7:40 pm-6:49 pm

2 stops31h 09m

$882

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 5/27

3:40 pm-9:00 pm

3 stops21h 20m

Belfast Intl

Mon 6/1

5:35 pm-9:08 pm

3 stops35h 33m

$907

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 5/27

7:10 pm-10:20 pm

2 stops19h 10m

Belfast Intl

Mon 6/1

5:35 pm-9:08 pm

3 stops35h 33m

$910

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 5/6

7:00 pm-5:05 pm

2 stops14h 05m

Belfast Intl

Wed 5/13

7:35 am-8:40 pm

2 stops21h 05m

$924

Quickest round-trip

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 9/2

1:32 pm-1:35 pm

2 stops16h 03m

Belfast City

Wed 9/9

6:30 am-5:29 pm

2 stops18h 59m

$943

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 and Aer Lingus 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	12h 40m
Direct flights	None

The fastest flight from Seattle to Northern Ireland takes 12h 40m

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

Search flight deals

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 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.

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.