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.

$509 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.

6:30 am - 6:45 pm

BFS

SEA

44h 15m

3 stops

3:40 pm - 10:15 pm

SEA

BFS

22h 35m

3 stops

$1,000Multiple Airlines

Mon, Jun 29 - Mon, Jul 6

6:30 am - 6:25 pm

BHD

SEA

19h 55m

1 stop

8:20 pm - 6:45 pm

SEA

BHD

14h 25m

1 stop

$1,008British Airways

Thu, Oct 15 - Mon, Oct 19

6:35 am - 11:18 pm

BHD

SEA

24h 43m

2 stops

2:46 pm - 10:40 am

SEA

BHD

35h 54m

2 stops

$1,011British Airways

Wed, Nov 4 - Sun, Nov 8

12:45 pm - 6:25 pm

BHD

SEA

13h 40m

1 stop

11:34 am - 3:30 pm

SEA

BHD

19h 56m

2 stops

$1,018Multiple Airlines

Thu, Oct 15 - Mon, Oct 19

6:30 am - 12:14 am

BHD

SEA

25h 44m

2 stops

3:10 pm - 3:30 pm

SEA

BHD

16h 20m

2 stops

$1,024Multiple Airlines

Thu, Oct 15 - Mon, Oct 19

6:30 am - 6:45 pm

BFS

SEA

44h 15m

3 stops

7:00 pm - 10:35 pm

SEA

BFS

19h 35m

2 stops

$1,034Multiple Airlines

Mon, Jun 29 - Mon, Jul 6

6:30 am - 11:35 am

BHD

SEA

13h 05m

1 stop

8:20 pm - 6:45 pm

SEA

BHD

14h 25m

1 stop

$1,046British Airways

Wed, Oct 7 - Sun, Oct 11

8:25 am - 9:40 am

BFS

SEA

33h 15m

3 stops

5:45 am - 6:25 pm

SEA

BFS

28h 40m

3 stops

$1,063Multiple Airlines

Sun, Jun 21 - Sun, Jun 28

10:05 am - 12:15 am

BHD

SEA

22h 10m

2 stops

6:23 am - 10:30 am

SEA

BHD

20h 07m

2 stops

$1,066British Airways

Wed, Oct 7 - Sun, Oct 11

8:35 pm - 6:25 pm

BHD

SEA

29h 50m

1 stop

11:34 am - 3:30 pm

SEA

BHD

19h 56m

2 stops

$1,071British Airways

Thu, Oct 15 - Mon, Oct 19

British Airways flights from Northern Ireland to Seattle

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

British Airways

Oct 15

BHD6:30 amBelfast City

19h 55m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

Oct 19

SEA8:20 pmSeattle/Tacoma Intl

14h 25m

1 stop

BHD6:45 pmBelfast City

$1,008

British Airways

Nov 4

BHD6:35 amBelfast City

24h 43m

2 stops

SEA11:18 pmSeattle/Tacoma Intl

Nov 8

SEA2:46 pmSeattle/Tacoma Intl

35h 54m

2 stops

BHD10:40 amBelfast City

$1,011

British Airways

Oct 7

BHD6:30 amBelfast City

13h 05m

1 stop

SEA11:35 amSeattle/Tacoma Intl

Oct 11

SEA8:20 pmSeattle/Tacoma Intl

14h 25m

1 stop

BHD6:45 pmBelfast City

$1,046

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 6/29

6:30 am-6:45 pm

3 stops44h 15m

Seattle/Tacoma Intl

Mon 7/6

3:40 pm-10:15 pm

3 stops22h 35m

$1,000

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 10/15

6:30 am-6:25 pm

1 stop19h 55m

Seattle/Tacoma Intl

Mon 10/19

8:20 pm-6:45 pm

1 stop14h 25m

$1,008

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 11/4

6:35 am-11:18 pm

2 stops24h 43m

Seattle/Tacoma Intl

Sun 11/8

2:46 pm-10:40 am

2 stops35h 54m

$1,011

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 10/15

12:45 pm-6:25 pm

1 stop13h 40m

Seattle/Tacoma Intl

Mon 10/19

11:34 am-3:30 pm

2 stops19h 56m

$1,018

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 10/15

6:30 am-12:14 am

2 stops25h 44m

Seattle/Tacoma Intl

Mon 10/19

3:10 pm-3:30 pm

2 stops16h 20m

$1,024

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 6/29

6:30 am-6:45 pm

3 stops44h 15m

Seattle/Tacoma Intl

Mon 7/6

7:00 pm-10:35 pm

2 stops19h 35m

$1,034

Quickest round-trip

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 10/7

6:30 am-11:35 am

1 stop13h 05m

Seattle/Tacoma Intl

Sun 10/11

8:20 pm-6:45 pm

1 stop14h 25m

$1,046

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 6/21

8:25 am-9:40 am

3 stops33h 15m

Seattle/Tacoma Intl

Sun 6/28

5:45 am-6:25 pm

3 stops28h 40m

$1,063

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 10/7

10:05 am-12:15 am

2 stops22h 10m

Seattle/Tacoma Intl

Sun 10/11

6:23 am-10:30 am

2 stops20h 07m

$1,066

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 10/15

8:35 pm-6:25 pm

1 stop29h 50m

Seattle/Tacoma Intl

Mon 10/19

11:34 am-3:30 pm

2 stops19h 56m

$1,071

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

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

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	24h 55m
Direct flights	None

The fastest flight from Northern Ireland to Seattle takes 24h 55m

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

Search flight deals

Frequently asked questions about flying from Northern Ireland to Seattle

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

Redmond

Kent

Tukwila

Puyallup

Marysville

Lakewood

Cle Elum

Federal Way

Centralia

Fife

Westport

Shoreline

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.