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 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.

$353 Cheap Flights from Seattle to Northern Ireland in 2026/27

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.

2:35 pm - 7:00 pmSEA Seattle/Tacoma Intl-BHD Belfast City

20h 25m2 stops Reykjavik Keflavik Intl London Heathrow

2:20 pm - 5:00 pmBHD Belfast City-SEA Seattle/Tacoma Intl

34h 40m2 stops London Gatwick Reykjavik Keflavik Intl

$850Multiple Airlines

Wed, Jan 20 - Wed, Jan 27

6:45 pm - 4:50 pmSEA Seattle/Tacoma Intl-BHD Belfast City

14h 05m1 stop London Heathrow

4:55 pm - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

31h 55m1 stop London Heathrow

$901British Airways

Sun, Mar 7 - Tue, Mar 9

8:20 pm - 5:40 pmSEA Seattle/Tacoma Intl-BHD Belfast City

13h 20m1 stop London Heathrow

6:30 am - 6:25 pmBHD Belfast City-SEA Seattle/Tacoma Intl

19h 55m1 stop London Heathrow

$905British Airways

Sun, Apr 25 - Wed, Apr 28

8:20 pm - 5:40 pmSEA Seattle/Tacoma Intl-BHD Belfast City

13h 20m1 stop London Heathrow

6:30 am - 6:25 pmBHD Belfast City-SEA Seattle/Tacoma Intl

19h 55m1 stop London Heathrow

$906British Airways

Sun, Apr 25 - Wed, Apr 28

6:45 pm - 7:05 pmSEA Seattle/Tacoma Intl-BHD Belfast City

16h 20m1 stop London Heathrow

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

15h 35m1 stop London Heathrow

$958British Airways

Wed, Jan 20 - Wed, Jan 27

2:35 pm - 7:00 pmSEA Seattle/Tacoma Intl-BHD Belfast City

20h 25m2 stops Reykjavik Keflavik Intl London Heathrow

7:25 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

17h 25m1 stop London Gatwick

$961Multiple Airlines

Wed, Jan 20 - Wed, Jan 27

6:45 pm - 5:25 pmSEA Seattle/Tacoma Intl-BHD Belfast City

14h 40m1 stop London Heathrow

11:45 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 05m1 stop London Heathrow

$1,059British Airways

Fri, Jan 1 - Sat, Jan 16

6:45 pm - 5:25 pmSEA Seattle/Tacoma Intl-BHD Belfast City

14h 40m1 stop London Heathrow

11:45 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 05m1 stop London Heathrow

$1,074Multiple Airlines

Fri, Jan 1 - Sat, Jan 16

6:45 pm - 7:10 pmSEA Seattle/Tacoma Intl-BHD Belfast City

16h 25m1 stop London Heathrow

6:35 am - 8:13 pmBHD Belfast City-SEA Seattle/Tacoma Intl

21h 38m2 stops London Heathrow Chicago O'Hare Intl

$1,089British Airways

Fri, Jan 1 - Sat, Jan 16

10:47 am - 2:05 pmSEA Seattle/Tacoma Intl-BHD Belfast City

19h 18m2 stops Chicago O'Hare Intl London Heathrow

6:35 am - 8:13 pmBHD Belfast City-SEA Seattle/Tacoma Intl

21h 38m2 stops London Heathrow Chicago O'Hare Intl

$1,101American Airlines

Fri, Jan 1 - Sat, Jan 16

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

British Airways flights from Seattle to Northern Ireland

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

British Airways

Mar 7

SEA6:45 pmSeattle/Tacoma Intl

14h 05m

1 stop

BHD4:50 pmBelfast City

Mar 9

BHD4:55 pmBelfast City

31h 55m

1 stop

SEA4:50 pmSeattle/Tacoma Intl

$901

British Airways

Apr 25

SEA8:20 pmSeattle/Tacoma Intl

13h 20m

1 stop

BHD5:40 pmBelfast City

Apr 28

BHD6:30 amBelfast City

19h 55m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

$905

British Airways

Apr 25

SEA8:20 pmSeattle/Tacoma Intl

13h 20m

1 stop

BHD5:40 pmBelfast City

Apr 28

BHD6:30 amBelfast City

19h 55m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

$906

momondo Fare Finder

Use the filters below to find and compare flights from Seattle to Northern Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Wed 1/20

2:35 pm-7:00 pm

2 stops20h 25m

Belfast City

Wed 1/27

2:20 pm-5:00 pm

2 stops34h 40m

$850

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sun 3/7

6:45 pm-4:50 pm

1 stop14h 05m

Belfast City

Tue 3/9

4:55 pm-4:50 pm

1 stop31h 55m

$901

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sun 4/25

8:20 pm-5:40 pm

1 stop13h 20m

Belfast City

Wed 4/28

6:30 am-6:25 pm

1 stop19h 55m

$905

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sun 4/25

8:20 pm-5:40 pm

1 stop13h 20m

Belfast City

Wed 4/28

6:30 am-6:25 pm

1 stop19h 55m

$906

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Wed 1/20

6:45 pm-7:05 pm

1 stop16h 20m

Belfast City

Wed 1/27

9:15 am-4:50 pm

1 stop15h 35m

$958

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Wed 1/20

2:35 pm-7:00 pm

2 stops20h 25m

Belfast City

Wed 1/27

7:25 am-4:50 pm

1 stop17h 25m

$961

Quickest round-trip

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Fri 1/1

6:45 pm-5:25 pm

1 stop14h 40m

Belfast City

Sat 1/16

11:45 am-4:50 pm

1 stop13h 05m

$1,059

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Fri 1/1

6:45 pm-5:25 pm

1 stop14h 40m

Belfast City

Sat 1/16

11:45 am-4:50 pm

1 stop13h 05m

$1,074

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Fri 1/1

6:45 pm-7:10 pm

1 stop16h 25m

Belfast City

Sat 1/16

6:35 am-8:13 pm

2 stops21h 38m

$1,089

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Fri 1/1

10:47 am-2:05 pm

2 stops19h 18m

Belfast City

Sat 1/16

6:35 am-8:13 pm

2 stops21h 38m

$1,101

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted 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

Best Price Found	$353
Fastest flight time	13h 20m
Direct flights	None

The best one-way flight to Northern Ireland from Seattle in the past 72 hours is $353. The best round-trip flight deal from Seattle to Northern Ireland found on momondo in the last 72 hours is $850.

The fastest flight from Seattle to Northern Ireland takes 13h 20m

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 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 $804	Free Cancellation	Rating 6.7 8,286 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.