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Cheap flights from Northern Ireland to Seattle from £331

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 13/11. 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.
American Airlines Logo
14:50 - 11:30BHD-SEA
28h 40m1 stop
American Airlines Logo
18:50 - 16:45SEA-BHD
13h 55m1 stop
£639American Airlines
Find Deal
Mon, 10 Nov - Tue, 25 Nov
British Airways Logo
12:25 - 16:55BHD-SEA
12h 30m1 stop
British Airways Logo
18:50 - 16:45SEA-BHD
13h 55m1 stop
£641British Airways
Find Deal
Wed, 12 Nov - Tue, 25 Nov
American Airlines Logo
06:35 - 23:18BHD-SEA
24h 43m2 stops
American Airlines Logo
08:39 - 14:15SEA-BHD
21h 36m2 stops
£643American Airlines
Find Deal
Mon, 10 Nov - Mon, 24 Nov
British Airways Logo
14:40 - 11:30BHD-SEA
28h 50m1 stop
British Airways Logo
18:50 - 10:20SEA-BHD
31h 30m1 stop
£648British Airways
Find Deal
Mon, 10 Nov - Wed, 26 Nov
KLM Logo
17:20 - 11:45BHD-SEA
26h 25m1 stop
KLM Logo
15:00 - 21:00SEA-BHD
22h 00m1 stop
£690KLM
Find Deal
Sun, 9 Nov - Mon, 24 Nov
Multiple Airlines Logo
17:20 - 11:45BHD-SEA
26h 25m1 stop
Multiple Airlines Logo
14:05 - 16:50SEA-BHD
18h 45m2 stops
£709Multiple Airlines
Find Deal
Sun, 9 Nov - Mon, 24 Nov
Delta Logo
17:20 - 11:45BHD-SEA
26h 25m1 stop
Delta Logo
15:00 - 16:50SEA-BHD
17h 50m1 stop
£720Delta
Find Deal
Sun, 9 Nov - Tue, 25 Nov
Delta Logo
17:20 - 11:45BHD-SEA
26h 25m1 stop
Delta Logo
15:00 - 16:50SEA-BHD
17h 50m1 stop
£758Delta
Find Deal
Sun, 9 Nov - Thu, 20 Nov
Multiple Airlines Logo
10:00 - 22:16BFS-SEA
44h 16m3 stops
Multiple Airlines Logo
05:50 - 19:25SEA-BFS
29h 35m3 stops
£767Multiple Airlines
Find Deal
Fri, 5 Dec - Fri, 12 Dec
KLM Logo
06:30 - 16:22BHD-SEA
17h 52m2 stops
KLM Logo
15:00 - 21:00SEA-BHD
22h 00m1 stop
£773KLM
Find Deal
Tue, 11 Nov - Sun, 23 Nov

American Airlines flights from Northern Ireland to Seattle

Our best American Airlines deals on Northern Ireland to Seattle flight tickets
American Airlines
10 Nov
BHD14:50Belfast City
28h 40m
1 stop
SEA11:30Seattle/Tacoma Intl
25 Nov
SEA18:50Seattle/Tacoma Intl
13h 55m
1 stop
BHD16:45Belfast City
£639
Find similar
American Airlines
10 Nov
BHD06:35Belfast City
24h 43m
2 stops
SEA23:18Seattle/Tacoma Intl
24 Nov
SEA08:39Seattle/Tacoma Intl
21h 36m
2 stops
BHD14:15Belfast City
£643
Find similar
American Airlines
10 Nov
BHD06:35Belfast City
24h 43m
2 stops
SEA23:18Seattle/Tacoma Intl
25 Nov
SEA14:46Seattle/Tacoma Intl
19h 54m
2 stops
BHD18:40Belfast City
£651
Find similar

Delta flights from Northern Ireland to Seattle

Our best Delta deals on Northern Ireland to Seattle flight tickets
Delta
9 Nov
BHD17:20Belfast City
26h 25m
1 stop
SEA11:45Seattle/Tacoma Intl
25 Nov
SEA15:00Seattle/Tacoma Intl
17h 50m
1 stop
BHD16:50Belfast City
£720
Find similar
Delta
9 Nov
BHD17:20Belfast City
26h 25m
1 stop
SEA11:45Seattle/Tacoma Intl
20 Nov
SEA15:00Seattle/Tacoma Intl
17h 50m
1 stop
BHD16:50Belfast City
£758
Find similar
Delta
7 Nov
BHD06:30Belfast City
13h 15m
1 stop
SEA11:45Seattle/Tacoma Intl
20 Nov
SEA15:00Seattle/Tacoma Intl
17h 50m
1 stop
BHD16:50Belfast City
£788
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 22 October 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

Mon 10/11

14:50-11:30

1 stop28h 40m

Seattle/Tacoma Intl

Tue 25/11

18:50-16:45

1 stop13h 55m

£639

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 12/11

12:25-16:55

1 stop12h 30m

Seattle/Tacoma Intl

Tue 25/11

18:50-16:45

1 stop13h 55m

£641

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 10/11

06:35-23:18

2 stops24h 43m

Seattle/Tacoma Intl

Mon 24/11

08:39-14:15

2 stops21h 36m

£643

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 10/11

14:40-11:30

1 stop28h 50m

Seattle/Tacoma Intl

Wed 26/11

18:50-10:20

1 stop31h 30m

£648

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sun 9/11

17:20-11:45

1 stop26h 25m

Seattle/Tacoma Intl

Mon 24/11

15:00-21:00

1 stop22h 00m

£690

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sun 9/11

17:20-11:45

1 stop26h 25m

Seattle/Tacoma Intl

Mon 24/11

14:05-16:50

2 stops18h 45m

£709

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sun 9/11

17:20-11:45

1 stop26h 25m

Seattle/Tacoma Intl

Tue 25/11

15:00-16:50

1 stop17h 50m

£720

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sun 9/11

17:20-11:45

1 stop26h 25m

Seattle/Tacoma Intl

Thu 20/11

15:00-16:50

1 stop17h 50m

£758

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Fri 5/12

10:00-22:16

3 stops44h 16m

Seattle/Tacoma Intl

Fri 12/12

05:50-19:25

3 stops29h 35m

£767

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 11/11

06:30-16:22

2 stops17h 52m

Seattle/Tacoma Intl

Sun 23/11

15:00-21:00

1 stop22h 00m

£773

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

Finnair 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

Direct flights

None
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 £440Free CancellationRating
6.7
7,466 reviews
Search British Airways flights
American AirlinesPriceFrom £561Free CancellationRating
7.2
11,028 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
Renton
SeaTac

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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