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Cheap flights from Northern Ireland to Seattle from £294

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 16/1. 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
06:35 - 13:14BHD-SEA
38h 39m2 stops
American Airlines Logo
14:04 - 16:05SEA-BHD
42h 01m2 stops
£630American Airlines
Find Deal
mer., 21 janv. - dim., 25 janv.
American Airlines Logo
09:15 - 13:14BHD-SEA
35h 59m2 stops
American Airlines Logo
14:04 - 10:40SEA-BHD
36h 36m2 stops
£643American Airlines
Find Deal
mer., 21 janv. - dim., 25 janv.
American Airlines Logo
09:05 - 11:30BHD-SEA
34h 25m1 stop
American Airlines Logo
18:50 - 16:05SEA-BHD
13h 15m1 stop
£656American Airlines
Find Deal
jeu., 29 janv. - lun., 2 févr.
American Airlines Logo
10:40 - 11:30BHD-SEA
32h 50m1 stop
American Airlines Logo
18:50 - 16:05SEA-BHD
13h 15m1 stop
£659American Airlines
Find Deal
jeu., 29 janv. - lun., 2 févr.
British Airways Logo
09:15 - 16:55BHD-SEA
15h 40m1 stop
British Airways Logo
18:50 - 16:50SEA-BHD
14h 00m1 stop
£659British Airways
Find Deal
mer., 21 janv. - dim., 25 janv.
American Airlines Logo
06:35 - 22:20BHD-SEA
23h 45m2 stops
American Airlines Logo
10:09 - 14:15SEA-BHD
20h 06m2 stops
£660American Airlines
Find Deal
jeu., 29 janv. - lun., 2 févr.
British Airways Logo
12:25 - 16:55BHD-SEA
12h 30m1 stop
British Airways Logo
08:04 - 10:20SEA-BHD
18h 16m2 stops
£661British Airways
Find Deal
mer., 21 janv. - dim., 25 janv.
American Airlines Logo
11:05 - 22:20BHD-SEA
19h 15m2 stops
American Airlines Logo
10:09 - 16:05SEA-BHD
21h 56m2 stops
£663American Airlines
Find Deal
jeu., 29 janv. - lun., 2 févr.
Multiple Airlines Logo
12:45 - 22:16BFS-SEA
41h 31m3 stops
Multiple Airlines Logo
14:35 - 22:20SEA-BFS
23h 45m3 stops
£1,457Multiple Airlines
Find Deal
sam., 3 janv. - sam., 10 janv.
Multiple Airlines Logo
22:25 - 13:20BFS-SEA
22h 55m2 stops
Multiple Airlines Logo
14:35 - 21:40SEA-BFS
23h 05m2 stops
£1,645Multiple Airlines
Find Deal
sam., 3 janv. - sam., 10 janv.

American Airlines flights from Northern Ireland to Seattle

Our best American Airlines deals on Northern Ireland to Seattle flight tickets
American Airlines
21 Jan
BHD06:35Belfast City
38h 39m
2 stops
SEA13:14Seattle/Tacoma Intl
25 Jan
SEA14:04Seattle/Tacoma Intl
42h 01m
2 stops
BHD16:05Belfast City
£630
Find similar
American Airlines
21 Jan
BHD09:15Belfast City
35h 59m
2 stops
SEA13:14Seattle/Tacoma Intl
25 Jan
SEA14:04Seattle/Tacoma Intl
36h 36m
2 stops
BHD10:40Belfast City
£643
Find similar
American Airlines
29 Jan
BHD09:05Belfast City
34h 25m
1 stop
SEA11:30Seattle/Tacoma Intl
2 Feb
SEA18:50Seattle/Tacoma Intl
13h 15m
1 stop
BHD16:05Belfast City
£656
Find similar

British Airways flights from Northern Ireland to Seattle

Our best British Airways deals on Northern Ireland to Seattle flight tickets
British Airways
21 Jan
BHD09:15Belfast City
15h 40m
1 stop
SEA16:55Seattle/Tacoma Intl
25 Jan
SEA18:50Seattle/Tacoma Intl
14h 00m
1 stop
BHD16:50Belfast City
£659
Find similar
British Airways
21 Jan
BHD12:25Belfast City
12h 30m
1 stop
SEA16:55Seattle/Tacoma Intl
25 Jan
SEA08:04Seattle/Tacoma Intl
18h 16m
2 stops
BHD10:20Belfast City
£661
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 21 novembre 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

mer. 21/1

06:35-13:14

2 stops38h 39m

Seattle/Tacoma Intl

dim. 25/1

14:04-16:05

2 stops42h 01m

£630

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

mer. 21/1

09:15-13:14

2 stops35h 59m

Seattle/Tacoma Intl

dim. 25/1

14:04-10:40

2 stops36h 36m

£643

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

jeu. 29/1

09:05-11:30

1 stop34h 25m

Seattle/Tacoma Intl

lun. 2/2

18:50-16:05

1 stop13h 15m

£656

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

jeu. 29/1

10:40-11:30

1 stop32h 50m

Seattle/Tacoma Intl

lun. 2/2

18:50-16:05

1 stop13h 15m

£659

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

mer. 21/1

09:15-16:55

1 stop15h 40m

Seattle/Tacoma Intl

dim. 25/1

18:50-16:50

1 stop14h 00m

£659

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

jeu. 29/1

06:35-22:20

2 stops23h 45m

Seattle/Tacoma Intl

lun. 2/2

10:09-14:15

2 stops20h 06m

£660

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

mer. 21/1

12:25-16:55

1 stop12h 30m

Seattle/Tacoma Intl

dim. 25/1

08:04-10:20

2 stops18h 16m

£661

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

jeu. 29/1

11:05-22:20

2 stops19h 15m

Seattle/Tacoma Intl

lun. 2/2

10:09-16:05

2 stops21h 56m

£663

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

sam. 3/1

12:45-22:16

3 stops41h 31m

Seattle/Tacoma Intl

sam. 10/1

14:35-22:20

3 stops23h 45m

£1,457

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

sam. 3/1

22:25-13:20

2 stops22h 55m

Seattle/Tacoma Intl

sam. 10/1

14:35-21:40

2 stops23h 05m

£1,645

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?

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

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 £450Free CancellationRating
6.7
7,533 reviews
Search British Airways flights
American AirlinesPriceFrom £575Free CancellationRating
7.2
11,047 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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