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

British Airways is the most popular carrier operating from Northern Ireland to Seattle/Tacoma Intl

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

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

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Northern Ireland to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$828 Cheap Flights from Northern Ireland to Seattle in 2026

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Find the cheapest flights from Northern Ireland to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:35 am - 5:55 pm

BFS

SEA

18h 20m

2 stops

7:00 pm - 5:05 pm

SEA

BFS

14h 05m

2 stops

$828Multiple Airlines

Wed, Apr 29 - Wed, May 6

7:35 am - 5:55 pm

BFS

SEA

18h 20m

2 stops

7:00 pm - 5:05 pm

SEA

BFS

14h 05m

2 stops

$843Multiple Airlines

Wed, Apr 29 - Wed, May 6

8:20 am - 8:40 pm

BFS

SEA

20h 20m

2 stops

7:00 pm - 8:55 pm

SEA

BFS

17h 55m

2 stops

$884Multiple Airlines

Tue, May 12 - Tue, May 19

7:00 am - 8:40 pm

BHD

SEA

21h 40m

2 stops

3:40 pm - 7:40 pm

SEA

BHD

20h 00m

2 stops

$922Multiple Airlines

Wed, Apr 29 - Wed, May 6

7:00 am - 8:40 pm

BHD

SEA

21h 40m

2 stops

3:40 pm - 7:40 pm

SEA

BHD

20h 00m

2 stops

$923Multiple Airlines

Wed, Apr 29 - Wed, May 6

9:50 am - 4:30 pm

BHD

SEA

14h 40m

1 stop

5:45 pm - 4:55 pm

SEA

BHD

15h 10m

1 stop

$934KLM

Wed, Apr 29 - Wed, May 6

11:35 am - 6:25 pm

BHD

SEA

14h 50m

1 stop

8:20 pm - 6:45 pm

SEA

BHD

14h 25m

1 stop

$957British Airways

Wed, Sep 23 - Sun, Sep 27

11:35 am - 6:25 pm

BHD

SEA

14h 50m

1 stop

8:20 pm - 8:35 pm

SEA

BHD

16h 15m

1 stop

$961British Airways

Wed, Sep 23 - Sun, Sep 27

9:50 am - 4:30 pm

BHD

SEA

14h 40m

1 stop

5:45 pm - 9:20 am

SEA

BHD

31h 35m

1 stop

$968KLM

Wed, Apr 29 - Wed, May 6

10:05 am - 9:09 pm

BHD

SEA

19h 04m

2 stops

6:24 am - 10:30 am

SEA

BHD

20h 06m

2 stops

$972British Airways

Wed, Sep 23 - Sun, Sep 27

British Airways flights from Northern Ireland to Seattle

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

British Airways

Sep 23

BHD11:35 amBelfast City

14h 50m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

Sep 27

SEA8:20 pmSeattle/Tacoma Intl

14h 25m

1 stop

BHD6:45 pmBelfast City

$957

British Airways

Sep 23

BHD11:35 amBelfast City

14h 50m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

Sep 27

SEA8:20 pmSeattle/Tacoma Intl

16h 15m

1 stop

BHD8:35 pmBelfast City

$961

British Airways

Sep 23

BHD10:05 amBelfast City

19h 04m

2 stops

SEA9:09 pmSeattle/Tacoma Intl

Sep 27

SEA6:24 amSeattle/Tacoma Intl

20h 06m

2 stops

BHD10:30 amBelfast City

$972

KLM flights from Northern Ireland to Seattle

Our best KLM deals on Northern Ireland to Seattle flight tickets

KLM

Apr 29

BHD9:50 amBelfast City

14h 40m

1 stop

SEA4:30 pmSeattle/Tacoma Intl

May 6

SEA5:45 pmSeattle/Tacoma Intl

15h 10m

1 stop

BHD4:55 pmBelfast City

$934

KLM

Apr 29

BHD9:50 amBelfast City

14h 40m

1 stop

SEA4:30 pmSeattle/Tacoma Intl

May 6

SEA5:45 pmSeattle/Tacoma Intl

31h 35m

1 stop

BHD9:20 amBelfast City

$968

KLM

Apr 14

BHD5:30 pmBelfast City

29h 12m

2 stops

SEA2:42 pmSeattle/Tacoma Intl

Apr 24

SEA1:45 pmSeattle/Tacoma Intl

35h 35m

2 stops

BHD9:20 amBelfast City

$1,086

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Wed 4/29

7:35 am-5:55 pm

2 stops18h 20m

Seattle/Tacoma Intl

Wed 5/6

7:00 pm-5:05 pm

2 stops14h 05m

$828

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Wed 4/29

7:35 am-5:55 pm

2 stops18h 20m

Seattle/Tacoma Intl

Wed 5/6

7:00 pm-5:05 pm

2 stops14h 05m

$843

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Tue 5/12

8:20 am-8:40 pm

2 stops20h 20m

Seattle/Tacoma Intl

Tue 5/19

7:00 pm-8:55 pm

2 stops17h 55m

$884

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/29

7:00 am-8:40 pm

2 stops21h 40m

Seattle/Tacoma Intl

Wed 5/6

3:40 pm-7:40 pm

2 stops20h 00m

$922

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/29

7:00 am-8:40 pm

2 stops21h 40m

Seattle/Tacoma Intl

Wed 5/6

3:40 pm-7:40 pm

2 stops20h 00m

$923

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/29

9:50 am-4:30 pm

1 stop14h 40m

Seattle/Tacoma Intl

Wed 5/6

5:45 pm-4:55 pm

1 stop15h 10m

$934

Quickest round-trip

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 9/23

11:35 am-6:25 pm

1 stop14h 50m

Seattle/Tacoma Intl

Sun 9/27

8:20 pm-6:45 pm

1 stop14h 25m

$957

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 9/23

11:35 am-6:25 pm

1 stop14h 50m

Seattle/Tacoma Intl

Sun 9/27

8:20 pm-8:35 pm

1 stop16h 15m

$961

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/29

9:50 am-4:30 pm

1 stop14h 40m

Seattle/Tacoma Intl

Wed 5/6

5:45 pm-9:20 am

1 stop31h 35m

$968

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 9/23

10:05 am-9:09 pm

2 stops19h 04m

Seattle/Tacoma Intl

Sun 9/27

6:24 am-10:30 am

2 stops20h 06m

$972

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 Northern Ireland to Seattle

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

Prices

Airlines

Can stopping save me money on Northern Ireland to Seattle flights?

You could potentially save up to 16% on your flight if you consider stops on a Northern Ireland to Seattle flight.

Cheap Northern Ireland to Seattle flight deals and tips

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

Fastest flight time	13h 05m
Direct flights	None

The fastest flight from Northern Ireland to Seattle takes 13h 05m

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

Search flight deals

When did momondo last update prices for flights from Northern Ireland to Seattle/Tacoma Intl Airport?
Prices for flights from Northern Ireland to Seattle/Tacoma Intl Airport are updated daily.
How old do you have to be to fly from Northern Ireland to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Northern Ireland to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Redmond

Marysville

Puyallup

Cle Elum

Lakewood

Tukwila

Federal Way

Centralia

Fife

Westport

Kirkland

Tumwater

Why use momondo?

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

Finding the right flight to Seattle from Northern Ireland 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 Seattle quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for Northern Ireland to Seattle flights to just show those with flexible booking policies.

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

Once all potential Northern Ireland to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Northern Ireland and alert you when they change.