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.

$510 Cheap Flights from Northern Ireland to Seattle in 2026

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.

8:35 pm - 11:35 am

BHD

SEA

23h 00m

1 stop

8:20 pm - 6:45 pm

SEA

BHD

14h 25m

1 stop

$902British Airways

Thu, Sep 10 - Thu, Oct 1

4:35 pm - 9:36 pm

BHD

SEA

37h 01m

2 stops

8:20 pm - 6:45 pm

SEA

BHD

14h 25m

1 stop

$907Iberia

Thu, Sep 10 - Thu, Oct 1

9:35 am - 9:36 pm

BHD

SEA

20h 01m

2 stops

1:40 pm - 3:30 pm

SEA

BHD

17h 50m

2 stops

$908British Airways

Thu, Sep 10 - Thu, Oct 1

8:35 pm - 11:35 am

BHD

SEA

23h 00m

1 stop

8:20 pm - 6:45 pm

SEA

BHD

14h 25m

1 stop

$909British Airways

Thu, Sep 10 - Thu, Oct 1

9:35 am - 9:36 pm

BHD

SEA

20h 01m

2 stops

1:40 pm - 3:30 pm

SEA

BHD

17h 50m

2 stops

$915British Airways

Thu, Sep 10 - Thu, Oct 1

8:35 pm - 6:25 pm

BHD

SEA

29h 50m

1 stop

8:20 pm - 6:45 pm

SEA

BHD

14h 25m

1 stop

$942British Airways

Thu, Sep 24 - Sun, Sep 27

9:35 am - 11:35 am

BHD

SEA

34h 00m

1 stop

10:59 am - 6:45 pm

SEA

BHD

23h 46m

2 stops

$943British Airways

Thu, Sep 24 - Sun, Sep 27

8:35 pm - 6:25 pm

BHD

SEA

29h 50m

1 stop

8:20 pm - 6:45 pm

SEA

BHD

14h 25m

1 stop

$944British Airways

Thu, Sep 24 - Sun, Sep 27

6:30 am - 9:36 pm

BHD

SEA

23h 06m

2 stops

6:15 am - 10:30 am

SEA

BHD

20h 15m

2 stops

$947British Airways

Thu, Sep 24 - Sun, Sep 27

6:40 am - 9:40 am

BFS

SEA

35h 00m

3 stops

7:00 pm - 11:00 pm

SEA

BFS

20h 00m

3 stops

$1,060Multiple Airlines

Thu, Aug 13 - Thu, Aug 20

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British Airways flights from Northern Ireland to Seattle

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

British Airways

Sep 10

BHD8:35 pmBelfast City

23h 00m

1 stop

SEA11:35 amSeattle/Tacoma Intl

Oct 1

SEA8:20 pmSeattle/Tacoma Intl

14h 25m

1 stop

BHD6:45 pmBelfast City

$902

British Airways

Sep 10

BHD9:35 amBelfast City

20h 01m

2 stops

SEA9:36 pmSeattle/Tacoma Intl

Oct 1

SEA1:40 pmSeattle/Tacoma Intl

17h 50m

2 stops

BHD3:30 pmBelfast City

$908

British Airways

Sep 10

BHD8:35 pmBelfast City

23h 00m

1 stop

SEA11:35 amSeattle/Tacoma Intl

Oct 1

SEA8:20 pmSeattle/Tacoma Intl

14h 25m

1 stop

BHD6:45 pmBelfast City

$909

Aer Lingus flights from Northern Ireland to Seattle

Our best Aer Lingus deals on Northern Ireland to Seattle flight tickets

Aer Lingus

Sep 17

BHD9:50 amBelfast City

15h 20m

2 stops

SEA5:10 pmSeattle/Tacoma Intl

Sep 17

SEA7:10 pmSeattle/Tacoma Intl

16h 55m

2 stops

BHD8:05 pmBelfast City

$1,137

Aer Lingus

Aug 2

BHD6:30 amBelfast City

18h 40m

2 stops

SEA5:10 pmSeattle/Tacoma Intl

Aug 8

SEA7:10 pmSeattle/Tacoma Intl

17h 20m

2 stops

BHD8:30 pmBelfast City

$1,280

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/10

8:35 pm-11:35 am

1 stop23h 00m

Seattle/Tacoma Intl

Thu 10/1

8:20 pm-6:45 pm

1 stop14h 25m

$902

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/10

4:35 pm-9:36 pm

2 stops37h 01m

Seattle/Tacoma Intl

Thu 10/1

8:20 pm-6:45 pm

1 stop14h 25m

$907

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/10

9:35 am-9:36 pm

2 stops20h 01m

Seattle/Tacoma Intl

Thu 10/1

1:40 pm-3:30 pm

2 stops17h 50m

$908

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/10

8:35 pm-11:35 am

1 stop23h 00m

Seattle/Tacoma Intl

Thu 10/1

8:20 pm-6:45 pm

1 stop14h 25m

$909

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/10

9:35 am-9:36 pm

2 stops20h 01m

Seattle/Tacoma Intl

Thu 10/1

1:40 pm-3:30 pm

2 stops17h 50m

$915

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/24

8:35 pm-6:25 pm

1 stop29h 50m

Seattle/Tacoma Intl

Sun 9/27

8:20 pm-6:45 pm

1 stop14h 25m

$942

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/24

9:35 am-11:35 am

1 stop34h 00m

Seattle/Tacoma Intl

Sun 9/27

10:59 am-6:45 pm

2 stops23h 46m

$943

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/24

8:35 pm-6:25 pm

1 stop29h 50m

Seattle/Tacoma Intl

Sun 9/27

8:20 pm-6:45 pm

1 stop14h 25m

$944

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/24

6:30 am-9:36 pm

2 stops23h 06m

Seattle/Tacoma Intl

Sun 9/27

6:15 am-10:30 am

2 stops20h 15m

$947

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 8/13

6:40 am-9:40 am

3 stops35h 00m

Seattle/Tacoma Intl

Thu 8/20

7:00 pm-11:00 pm

3 stops20h 00m

$1,060

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 and Aer Lingus are the most popular carriers 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	31h 10m
Direct flights	None

The fastest flight from Northern Ireland to Seattle takes 31h 10m

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

Lakewood

Puyallup

Tukwila

Cle Elum

Federal Way

Fife

Marysville

Centralia

Kirkland

Shoreline

Westport

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.