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Cheap flights from Northern Ireland to Seattle from £406

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Northern Ireland to Seattle departing on 23/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Northern Ireland to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
06:35 - 22:07
BHD
-
SEA
23h 32m2 stops
Multiple Airlines Logo
12:51 - 10:40
SEA
-
BHD
37h 49m2 stops
£488Multiple Airlines
Wed, 4 Feb - Sun, 8 Feb
British Airways Logo
12:25 - 16:55
BHD
-
SEA
12h 30m1 stop
British Airways Logo
14:10 - 10:40
SEA
-
BHD
36h 30m2 stops
£526British Airways
Wed, 4 Feb - Sun, 8 Feb
British Airways Logo
06:35 - 22:07
BHD
-
SEA
23h 32m2 stops
British Airways Logo
14:10 - 10:40
SEA
-
BHD
36h 30m2 stops
£529British Airways
Wed, 4 Feb - Sun, 8 Feb
British Airways Logo
06:35 - 11:30
BHD
-
SEA
12h 55m1 stop
British Airways Logo
19:50 - 18:35
SEA
-
BHD
15h 45m1 stop
£533British Airways
Sat, 7 Mar - Mon, 9 Mar
British Airways Logo
06:35 - 16:55
BHD
-
SEA
18h 20m1 stop
British Airways Logo
08:04 - 13:55
SEA
-
BHD
21h 51m2 stops
£534British Airways
Wed, 4 Feb - Sun, 8 Feb
British Airways Logo
09:15 - 23:04
BHD
-
SEA
21h 49m2 stops
British Airways Logo
07:15 - 10:40
SEA
-
BHD
20h 25m2 stops
£537British Airways
Sat, 7 Mar - Mon, 9 Mar
British Airways Logo
06:35 - 22:07
BHD
-
SEA
23h 32m2 stops
British Airways Logo
08:04 - 13:55
SEA
-
BHD
21h 51m2 stops
£540British Airways
Wed, 4 Feb - Sun, 8 Feb
Multiple Airlines Logo
10:00 - 22:16
BFS
-
SEA
44h 16m3 stops
Multiple Airlines Logo
14:35 - 13:05
SEA
-
BFS
14h 30m2 stops
£740Multiple Airlines
Fri, 13 Feb - Fri, 20 Feb
Multiple Airlines Logo
10:00 - 22:16
BFS
-
SEA
44h 16m3 stops
Multiple Airlines Logo
15:10 - 22:35
SEA
-
BFS
23h 25m3 stops
£754Multiple Airlines
Fri, 13 Feb - Fri, 20 Feb
Multiple Airlines Logo
10:35 - 17:00
BFS
-
SEA
14h 25m2 stops
Multiple Airlines Logo
14:35 - 13:05
SEA
-
BFS
14h 30m2 stops
£916Multiple Airlines
Fri, 13 Feb - Fri, 20 Feb

British Airways flights from Northern Ireland to Seattle

Our best British Airways deals on Northern Ireland to Seattle flight tickets
British Airways
4 Feb
BHD12:25Belfast City
12h 30m
1 stop
SEA16:55Seattle/Tacoma Intl
8 Feb
SEA14:10Seattle/Tacoma Intl
36h 30m
2 stops
BHD10:40Belfast City
£526
Find similar
British Airways
4 Feb
BHD06:35Belfast City
23h 32m
2 stops
SEA22:07Seattle/Tacoma Intl
8 Feb
SEA14:10Seattle/Tacoma Intl
36h 30m
2 stops
BHD10:40Belfast City
£529
Find similar
British Airways
7 Mar
BHD06:35Belfast City
12h 55m
1 stop
SEA11:30Seattle/Tacoma Intl
9 Mar
SEA19:50Seattle/Tacoma Intl
15h 45m
1 stop
BHD18:35Belfast City
£533
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Northern Ireland to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 31 December 2025.
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

Wed 4/2

06:35-22:07

2 stops23h 32m

Seattle/Tacoma Intl

Sun 8/2

12:51-10:40

2 stops37h 49m

£488

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

12:25-16:55

1 stop12h 30m

Seattle/Tacoma Intl

Sun 8/2

14:10-10:40

2 stops36h 30m

£526

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

06:35-22:07

2 stops23h 32m

Seattle/Tacoma Intl

Sun 8/2

14:10-10:40

2 stops36h 30m

£529

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 7/3

06:35-11:30

1 stop12h 55m

Seattle/Tacoma Intl

Mon 9/3

19:50-18:35

1 stop15h 45m

£533

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

06:35-16:55

1 stop18h 20m

Seattle/Tacoma Intl

Sun 8/2

08:04-13:55

2 stops21h 51m

£534

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 7/3

09:15-23:04

2 stops21h 49m

Seattle/Tacoma Intl

Mon 9/3

07:15-10:40

2 stops20h 25m

£537

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

06:35-22:07

2 stops23h 32m

Seattle/Tacoma Intl

Sun 8/2

08:04-13:55

2 stops21h 51m

£540

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Fri 13/2

10:00-22:16

3 stops44h 16m

Seattle/Tacoma Intl

Fri 20/2

14:35-13:05

2 stops14h 30m

£740

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Fri 13/2

10:00-22:16

3 stops44h 16m

Seattle/Tacoma Intl

Fri 20/2

15:10-22:35

3 stops23h 25m

£754

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Fri 13/2

10:35-17:00

2 stops14h 25m

Seattle/Tacoma Intl

Fri 20/2

14:35-13:05

2 stops14h 30m

£916

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Seattle from

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

12h 55m

Direct flights

None
The fastest flight from Northern Ireland to Seattle takes 12h 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

  • 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 refresh daily.

  • How many operators does momondo search for flights from Northern Ireland to Seattle/Tacoma Intl Airport?

  • 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 required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Northern Ireland to Seattle

Compare and see reviews for airlines that fly from Northern Ireland to Seattle with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom £436Free CancellationRating
6.7
7,630 reviews
Search British Airways flights
American AirlinesPriceFrom £557Free CancellationRating
7.2
11,069 reviews
Search American Airlines flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Fife
SeaTac
Tukwila

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Northern Ireland to Seattle. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to Seattle from Northern Ireland which offer a flexible booking policy as well as other useful filters and features.

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

momondo helps you find the best flight between Northern Ireland and Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Price alerts on flights to Seattle from Northern Ireland are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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