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 May 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.

$322 Cheap Flights from Seattle to Northern Ireland in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

1:30 pm - 12:55 pm

SEA

BHD

15h 25m

1 stop

8:35 pm - 11:35 am

BHD

SEA

23h 00m

1 stop

$891British Airways

Mon, Oct 5 - Thu, Oct 22

8:20 pm - 6:45 pm

SEA

BHD

14h 25m

1 stop

8:35 pm - 11:35 am

BHD

SEA

23h 00m

1 stop

$892British Airways

Mon, Oct 5 - Thu, Oct 22

1:30 pm - 10:30 am

SEA

BHD

13h 00m

1 stop

4:35 pm - 11:35 am

BHD

SEA

27h 00m

1 stop

$910British Airways

Sun, Sep 27 - Thu, Oct 1

8:20 pm - 6:45 pm

SEA

BHD

14h 25m

1 stop

8:35 pm - 11:35 am

BHD

SEA

23h 00m

1 stop

$911British Airways

Sun, Sep 27 - Thu, Oct 1

3:10 pm - 3:30 pm

SEA

BHD

16h 20m

2 stops

6:30 am - 11:35 am

BHD

SEA

13h 05m

1 stop

$914Multiple Airlines

Mon, Oct 5 - Thu, Oct 22

3:10 pm - 3:30 pm

SEA

BHD

16h 20m

2 stops

6:30 am - 11:35 am

BHD

SEA

13h 05m

1 stop

$915Multiple Airlines

Mon, Oct 5 - Thu, Oct 22

3:10 pm - 3:30 pm

SEA

BHD

16h 20m

2 stops

12:45 pm - 12:14 am

BHD

SEA

19h 29m

2 stops

$924Multiple Airlines

Mon, Oct 5 - Thu, Oct 22

3:10 pm - 3:30 pm

SEA

BHD

16h 20m

2 stops

12:45 pm - 12:14 am

BHD

SEA

19h 29m

2 stops

$925Multiple Airlines

Mon, Oct 5 - Thu, Oct 22

3:10 pm - 3:30 pm

SEA

BHD

16h 20m

2 stops

12:45 pm - 12:14 am

BHD

SEA

19h 29m

2 stops

$926Multiple Airlines

Mon, Oct 5 - Thu, Oct 22

3:40 pm - 9:40 pm

SEA

BFS

22h 00m

3 stops

6:30 am - 6:45 pm

BFS

SEA

44h 15m

3 stops

$935Multiple Airlines

Thu, May 28 - Mon, Jun 1

British Airways flights from Seattle to Northern Ireland

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

British Airways

Oct 5

SEA1:30 pmSeattle/Tacoma Intl

15h 25m

1 stop

BHD12:55 pmBelfast City

Oct 22

BHD8:35 pmBelfast City

23h 00m

1 stop

SEA11:35 amSeattle/Tacoma Intl

$891

British Airways

Oct 5

SEA8:20 pmSeattle/Tacoma Intl

14h 25m

1 stop

BHD6:45 pmBelfast City

Oct 22

BHD8:35 pmBelfast City

23h 00m

1 stop

SEA11:35 amSeattle/Tacoma Intl

$892

British Airways

Sep 27

SEA1:30 pmSeattle/Tacoma Intl

13h 00m

1 stop

BHD10:30 amBelfast City

Oct 1

BHD4:35 pmBelfast City

27h 00m

1 stop

SEA11:35 amSeattle/Tacoma Intl

$910

KLM flights from Seattle to Northern Ireland

Our best KLM deals on Seattle to Northern Ireland flight tickets

KLM

Jun 9

SEA7:15 amSeattle/Tacoma Intl

18h 05m

2 stops

BHD9:20 amBelfast City

Jun 16

BHD9:50 amBelfast City

21h 18m

2 stops

SEA11:08 pmSeattle/Tacoma Intl

$1,131

KLM

Jul 23

SEA5:40 pmSeattle/Tacoma Intl

31h 40m

1 stop

BHD9:20 amBelfast City

Jul 28

BHD9:50 amBelfast City

21h 18m

2 stops

SEA11:08 pmSeattle/Tacoma Intl

$1,132

KLM

Jul 3

SEA7:15 amSeattle/Tacoma Intl

18h 05m

2 stops

BHD9:20 amBelfast City

Aug 10

BHD5:30 pmBelfast City

30h 57m

1 stop

SEA4:27 pmSeattle/Tacoma Intl

$1,228

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

1:30 pm-12:55 pm

1 stop15h 25m

Belfast City

Thu 10/22

8:35 pm-11:35 am

1 stop23h 00m

$891

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

8:20 pm-6:45 pm

1 stop14h 25m

Belfast City

Thu 10/22

8:35 pm-11:35 am

1 stop23h 00m

$892

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 9/27

1:30 pm-10:30 am

1 stop13h 00m

Belfast City

Thu 10/1

4:35 pm-11:35 am

1 stop27h 00m

$910

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 9/27

8:20 pm-6:45 pm

1 stop14h 25m

Belfast City

Thu 10/1

8:35 pm-11:35 am

1 stop23h 00m

$911

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

$914

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

$915

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

3:10 pm-3:30 pm

2 stops16h 20m

Belfast City

Thu 10/22

12:45 pm-12:14 am

2 stops19h 29m

$924

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

3:10 pm-3:30 pm

2 stops16h 20m

Belfast City

Thu 10/22

12:45 pm-12:14 am

2 stops19h 29m

$925

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

3:10 pm-3:30 pm

2 stops16h 20m

Belfast City

Thu 10/22

12:45 pm-12:14 am

2 stops19h 29m

$926

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 5/28

3:40 pm-9:40 pm

3 stops22h 00m

Belfast Intl

Mon 6/1

6:30 am-6:45 pm

3 stops44h 15m

$935

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, American Airlines, 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	13h 00m
Direct flights	None

The fastest flight from Seattle to Northern Ireland takes 13h 00m

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 May 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 $776	Free Cancellation	Rating 6.7 7,979 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.