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Cheap flights from Northern Ireland to Seattle from £653

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Northern Ireland to Seattle departing on 5/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap return flights

Enter your travel dates to find the best prices.
American Airlines Logo
11:05 - 16:55BHD-SEA
13h 50m1 stop
American Airlines Logo
07:00 - 14:15SEA-BHD
24h 15m2 stops
£653American Airlines
Find Deal
Thu, 5 Mar - Mon, 9 Mar
American Airlines Logo
10:40 - 11:30BHD-SEA
32h 50m1 stop
American Airlines Logo
19:50 - 18:35SEA-BHD
15h 45m1 stop
£655American Airlines
Find Deal
Thu, 5 Mar - Mon, 9 Mar
British Airways Logo
17:45 - 16:55BHD-SEA
31h 10m1 stop
British Airways Logo
19:50 - 18:35SEA-BHD
15h 45m1 stop
£656British Airways
Find Deal
Thu, 5 Mar - Mon, 9 Mar
American Airlines Logo
15:05 - 23:32BHD-SEA
40h 27m2 stops
American Airlines Logo
13:48 - 14:15SEA-BHD
17h 27m2 stops
£657American Airlines
Find Deal
Thu, 5 Mar - Mon, 9 Mar
British Airways Logo
17:45 - 11:30BHD-SEA
25h 45m1 stop
British Airways Logo
19:50 - 18:35SEA-BHD
15h 45m1 stop
£658British Airways
Find Deal
Thu, 5 Mar - Mon, 9 Mar
American Airlines Logo
09:05 - 23:32BHD-SEA
22h 27m2 stops
American Airlines Logo
07:00 - 14:15SEA-BHD
24h 15m2 stops
£659American Airlines
Find Deal
Thu, 5 Mar - Mon, 9 Mar
American Airlines Logo
06:35 - 23:32BHD-SEA
24h 57m2 stops
American Airlines Logo
07:00 - 14:15SEA-BHD
24h 15m2 stops
£660American Airlines
Find Deal
Thu, 5 Mar - Mon, 9 Mar
British Airways Logo
06:35 - 16:55BHD-SEA
18h 20m1 stop
British Airways Logo
13:28 - 19:10SEA-BHD
21h 42m2 stops
£744British Airways
Find Deal
Wed, 10 Dec - Wed, 17 Dec
Aer Lingus Logo
06:40 - 18:20BHD-SEA
19h 40m2 stops
Aer Lingus Logo
20:05 - 18:25SEA-BHD
14h 20m2 stops
£762Aer Lingus
Find Deal
Wed, 10 Dec - Wed, 17 Dec
British Airways Logo
06:35 - 16:55BHD-SEA
18h 20m1 stop
British Airways Logo
18:50 - 19:10SEA-BHD
16h 20m1 stop
£1,017British Airways
Find Deal
Wed, 10 Dec - Wed, 17 Dec

British Airways flights from Northern Ireland to Seattle

Our best British Airways deals on Northern Ireland to Seattle flight tickets
British Airways
5 Mar
BHD17:45Belfast City
31h 10m
1 stop
SEA16:55Seattle/Tacoma Intl
9 Mar
SEA19:50Seattle/Tacoma Intl
15h 45m
1 stop
BHD18:35Belfast City
£656
Find similar
British Airways
5 Mar
BHD17:45Belfast City
25h 45m
1 stop
SEA11:30Seattle/Tacoma Intl
9 Mar
SEA19:50Seattle/Tacoma Intl
15h 45m
1 stop
BHD18:35Belfast City
£658
Find similar
British Airways
10 Dec
BHD06:35Belfast City
18h 20m
1 stop
SEA16:55Seattle/Tacoma Intl
17 Dec
SEA13:28Seattle/Tacoma Intl
21h 42m
2 stops
BHD19:10Belfast City
£744
Find similar

American Airlines flights from Northern Ireland to Seattle

Our best American Airlines deals on Northern Ireland to Seattle flight tickets
American Airlines
5 Mar
BHD11:05Belfast City
13h 50m
1 stop
SEA16:55Seattle/Tacoma Intl
9 Mar
SEA07:00Seattle/Tacoma Intl
24h 15m
2 stops
BHD14:15Belfast City
£653
Find similar
American Airlines
5 Mar
BHD10:40Belfast City
32h 50m
1 stop
SEA11:30Seattle/Tacoma Intl
9 Mar
SEA19:50Seattle/Tacoma Intl
15h 45m
1 stop
BHD18:35Belfast City
£655
Find similar
American Airlines
5 Mar
BHD15:05Belfast City
40h 27m
2 stops
SEA23:32Seattle/Tacoma Intl
9 Mar
SEA13:48Seattle/Tacoma Intl
17h 27m
2 stops
BHD14:15Belfast City
£657
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 14 November 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

Thu 5/3

11:05-16:55

1 stop13h 50m

Seattle/Tacoma Intl

Mon 9/3

07:00-14:15

2 stops24h 15m

£653

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

10:40-11:30

1 stop32h 50m

Seattle/Tacoma Intl

Mon 9/3

19:50-18:35

1 stop15h 45m

£655

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

17:45-16:55

1 stop31h 10m

Seattle/Tacoma Intl

Mon 9/3

19:50-18:35

1 stop15h 45m

£656

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

15:05-23:32

2 stops40h 27m

Seattle/Tacoma Intl

Mon 9/3

13:48-14:15

2 stops17h 27m

£657

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

17:45-11:30

1 stop25h 45m

Seattle/Tacoma Intl

Mon 9/3

19:50-18:35

1 stop15h 45m

£658

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

09:05-23:32

2 stops22h 27m

Seattle/Tacoma Intl

Mon 9/3

07:00-14:15

2 stops24h 15m

£659

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

06:35-23:32

2 stops24h 57m

Seattle/Tacoma Intl

Mon 9/3

07:00-14:15

2 stops24h 15m

£660

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 10/12

06:35-16:55

1 stop18h 20m

Seattle/Tacoma Intl

Wed 17/12

13:28-19:10

2 stops21h 42m

£744

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 10/12

06:40-18:20

2 stops19h 40m

Seattle/Tacoma Intl

Wed 17/12

20:05-18:25

2 stops14h 20m

£762

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 10/12

06:35-16:55

1 stop18h 20m

Seattle/Tacoma Intl

Wed 17/12

18:50-19:10

1 stop16h 20m

£1,017

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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 £447Free CancellationRating
6.7
7,521 reviews
Search British Airways flights
American AirlinesPriceFrom £571Free CancellationRating
7.2
11,051 reviews
Search American Airlines flights

  • How do I get Price Alerts for flights from Northern Ireland to Seattle?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Northern Ireland from Seattle. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Northern Ireland to Seattle with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

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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