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.

$923 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.

6:35 am - 11:30 am

BHD

SEA

12h 55m

1 stop

1:37 pm - 6:35 pm

SEA

BHD

21h 58m

2 stops

$923British Airways

Sat, Mar 7 - Mon, Mar 9

6:35 am - 11:30 am

BHD

SEA

12h 55m

1 stop

7:21 am - 2:15 pm

SEA

BHD

23h 54m

2 stops

$925British Airways

Sat, Mar 7 - Mon, Mar 9

6:35 am - 11:30 am

BHD

SEA

12h 55m

1 stop

7:50 pm - 6:35 pm

SEA

BHD

15h 45m

1 stop

$927British Airways

Sat, Mar 7 - Mon, Mar 9

6:35 am - 11:04 pm

BHD

SEA

24h 29m

2 stops

1:37 pm - 6:35 pm

SEA

BHD

21h 58m

2 stops

$929British Airways

Sat, Mar 7 - Mon, Mar 9

6:35 am - 11:04 pm

BHD

SEA

24h 29m

2 stops

7:21 am - 6:35 pm

SEA

BHD

28h 14m

2 stops

$931British Airways

Sat, Mar 7 - Mon, Mar 9

6:35 am - 11:04 pm

BHD

SEA

24h 29m

2 stops

1:37 pm - 2:15 pm

SEA

BHD

17h 38m

2 stops

$932British Airways

Sat, Mar 7 - Mon, Mar 9

8:55 am - 4:00 pm

BFS

SEA

39h 05m

3 stops

11:15 am - 6:55 pm

SEA

BFS

23h 40m

2 stops

$1,172Multiple Airlines

Mon, May 18 - Thu, May 28

8:15 am - 8:40 pm

BFS

SEA

20h 25m

2 stops

11:15 am - 6:55 pm

SEA

BFS

23h 40m

2 stops

$1,180Multiple Airlines

Mon, May 18 - Thu, May 28

8:55 am - 4:00 pm

BFS

SEA

39h 05m

3 stops

5:40 am - 6:55 pm

SEA

BFS

29h 15m

3 stops

$1,185Multiple Airlines

Mon, May 18 - Thu, May 28

8:05 am - 7:20 pm

BFS

SEA

18h 15m

2 stops

7:10 pm - 9:15 pm

SEA

BFS

18h 05m

2 stops

$1,493Multiple Airlines

Fri, Mar 27 - Fri, Apr 3

British Airways flights from Northern Ireland to Seattle

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

British Airways

Mar 7

BHD6:35 amBelfast City

12h 55m

1 stop

SEA11:30 amSeattle/Tacoma Intl

Mar 9

SEA1:37 pmSeattle/Tacoma Intl

21h 58m

2 stops

BHD6:35 pmBelfast City

$923

British Airways

Mar 7

BHD6:35 amBelfast City

12h 55m

1 stop

SEA11:30 amSeattle/Tacoma Intl

Mar 9

SEA7:21 amSeattle/Tacoma Intl

23h 54m

2 stops

BHD2:15 pmBelfast City

$925

British Airways

Mar 7

BHD6:35 amBelfast City

12h 55m

1 stop

SEA11:30 amSeattle/Tacoma Intl

Mar 9

SEA7:50 pmSeattle/Tacoma Intl

15h 45m

1 stop

BHD6:35 pmBelfast City

$926

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/7

6:35 am-11:30 am

1 stop12h 55m

Seattle/Tacoma Intl

Mon 3/9

1:37 pm-6:35 pm

2 stops21h 58m

$923

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/7

6:35 am-11:30 am

1 stop12h 55m

Seattle/Tacoma Intl

Mon 3/9

7:21 am-2:15 pm

2 stops23h 54m

$925

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/7

6:35 am-11:30 am

1 stop12h 55m

Seattle/Tacoma Intl

Mon 3/9

7:50 pm-6:35 pm

1 stop15h 45m

$927

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/7

6:35 am-11:04 pm

2 stops24h 29m

Seattle/Tacoma Intl

Mon 3/9

1:37 pm-6:35 pm

2 stops21h 58m

$929

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/7

6:35 am-11:04 pm

2 stops24h 29m

Seattle/Tacoma Intl

Mon 3/9

7:21 am-6:35 pm

2 stops28h 14m

$931

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/7

6:35 am-11:04 pm

2 stops24h 29m

Seattle/Tacoma Intl

Mon 3/9

1:37 pm-2:15 pm

2 stops17h 38m

$932

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 5/18

8:55 am-4:00 pm

3 stops39h 05m

Seattle/Tacoma Intl

Thu 5/28

11:15 am-6:55 pm

2 stops23h 40m

$1,172

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 5/18

8:15 am-8:40 pm

2 stops20h 25m

Seattle/Tacoma Intl

Thu 5/28

11:15 am-6:55 pm

2 stops23h 40m

$1,180

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 5/18

8:55 am-4:00 pm

3 stops39h 05m

Seattle/Tacoma Intl

Thu 5/28

5:40 am-6:55 pm

3 stops29h 15m

$1,185

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Fri 3/27

8:05 am-7:20 pm

2 stops18h 15m

Seattle/Tacoma Intl

Fri 4/3

7:10 pm-9:15 pm

2 stops18h 05m

$1,493

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 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	12h 30m
Direct flights	None

The fastest flight from Northern Ireland to Seattle takes 12h 30m

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

Marysville

Redmond

Puyallup

Cle Elum

Lakewood

Tukwila

Federal Way

Kirkland

Westport

Centralia

Fife

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.