Latest deals
FAQs
Reviews
Price Alerts

Cheap flights from Northern Ireland to Seattle from £618

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 22/4. 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

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Northern Ireland to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
13:50 - 18:25BHD-SEA
12h 35m1 stop
British Airways Logo
13:35 - 12:55SEA-BHD
15h 20m1 stop
£618British Airways
Find Deal
Wed, 22 Apr - Mon, 4 May
British Airways Logo
06:35 - 11:35BHD-SEA
13h 00m1 stop
British Airways Logo
13:35 - 15:40SEA-BHD
18h 05m1 stop
£627British Airways
Find Deal
Tue, 21 Apr - Mon, 4 May
British Airways Logo
09:35 - 21:12BHD-SEA
19h 37m2 stops
British Airways Logo
13:35 - 19:35SEA-BHD
22h 00m1 stop
£639British Airways
Find Deal
Tue, 21 Apr - Mon, 4 May
Multiple Airlines Logo
06:30 - 16:13BHD-SEA
17h 43m2 stops
Multiple Airlines Logo
17:35 - 16:55SEA-BHD
15h 20m1 stop
£645Multiple Airlines
Find Deal
Wed, 22 Apr - Mon, 4 May
American Airlines Logo
09:05 - 16:55BHD-SEA
15h 50m1 stop
American Airlines Logo
19:50 - 18:35SEA-BHD
15h 45m1 stop
£657American 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
£660American Airlines
Find Deal
Thu, 5 Mar - Mon, 9 Mar
KLM Logo
06:30 - 14:45BHD-SEA
16h 15m2 stops
KLM Logo
20:25 - 21:20SEA-BHD
16h 55m2 stops
£697KLM
Find Deal
Wed, 22 Apr - Mon, 4 May
Multiple Airlines Logo
14:20 - 16:59BHD-SEA
34h 39m2 stops
Multiple Airlines Logo
13:45 - 20:25SEA-BHD
22h 40m3 stops
£794Multiple Airlines
Find Deal
Tue, 21 Apr - Mon, 4 May
Virgin Atlantic Logo
06:30 - 15:50BHD-SEA
17h 20m1 stop
Virgin Atlantic Logo
14:05 - 16:55SEA-BHD
18h 50m1 stop
£1,115Virgin Atlantic
Find Deal
Wed, 22 Apr - Mon, 4 May
Virgin Atlantic Logo
06:30 - 22:25BHD-SEA
23h 55m2 stops
Virgin Atlantic Logo
17:35 - 16:55SEA-BHD
15h 20m1 stop
£1,171Virgin Atlantic
Find Deal
Wed, 22 Apr - Mon, 4 May

American Airlines flights from Northern Ireland to Seattle

Our best American Airlines deals on Northern Ireland to Seattle flight tickets
American Airlines
5 Mar
BHD09:05Belfast City
15h 50m
1 stop
SEA16:55Seattle/Tacoma Intl
9 Mar
SEA19:50Seattle/Tacoma Intl
15h 45m
1 stop
BHD18:35Belfast City
£657
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
£660
Find similar
American Airlines
5 Mar
BHD11:05Belfast City
20h 27m
2 stops
SEA23:32Seattle/Tacoma Intl
9 Mar
SEA13:48Seattle/Tacoma Intl
17h 27m
2 stops
BHD14:15Belfast City
£661
Find similar

British Airways flights from Northern Ireland to Seattle

Our best British Airways deals on Northern Ireland to Seattle flight tickets
British Airways
22 Apr
BHD13:50Belfast City
12h 35m
1 stop
SEA18:25Seattle/Tacoma Intl
4 May
SEA13:35Seattle/Tacoma Intl
15h 20m
1 stop
BHD12:55Belfast City
£618
Find similar
British Airways
21 Apr
BHD06:35Belfast City
13h 00m
1 stop
SEA11:35Seattle/Tacoma Intl
4 May
SEA13:35Seattle/Tacoma Intl
18h 05m
1 stop
BHD15:40Belfast City
£627
Find similar
British Airways
21 Apr
BHD09:35Belfast City
19h 37m
2 stops
SEA21:12Seattle/Tacoma Intl
4 May
SEA13:35Seattle/Tacoma Intl
22h 00m
1 stop
BHD19:35Belfast City
£639
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 6 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

Wed 22/4

13:50-18:25

1 stop12h 35m

Seattle/Tacoma Intl

Mon 4/5

13:35-12:55

1 stop15h 20m

£618

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 21/4

06:35-11:35

1 stop13h 00m

Seattle/Tacoma Intl

Mon 4/5

13:35-15:40

1 stop18h 05m

£627

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 21/4

09:35-21:12

2 stops19h 37m

Seattle/Tacoma Intl

Mon 4/5

13:35-19:35

1 stop22h 00m

£639

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 22/4

06:30-16:13

2 stops17h 43m

Seattle/Tacoma Intl

Mon 4/5

17:35-16:55

1 stop15h 20m

£645

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

09:05-16:55

1 stop15h 50m

Seattle/Tacoma Intl

Mon 9/3

19:50-18:35

1 stop15h 45m

£657

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

£660

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 22/4

06:30-14:45

2 stops16h 15m

Seattle/Tacoma Intl

Mon 4/5

20:25-21:20

2 stops16h 55m

£697

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 21/4

14:20-16:59

2 stops34h 39m

Seattle/Tacoma Intl

Mon 4/5

13:45-20:25

3 stops22h 40m

£794

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 22/4

06:30-15:50

1 stop17h 20m

Seattle/Tacoma Intl

Mon 4/5

14:05-16:55

1 stop18h 50m

£1,115

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 22/4

06:30-22:25

2 stops23h 55m

Seattle/Tacoma Intl

Mon 4/5

17:35-16:55

1 stop15h 20m

£1,171

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 £451Free CancellationRating
6.7
7,496 reviews
Search British Airways flights
American AirlinesPriceFrom £576Free CancellationRating
7.2
11,041 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.

An easier way to manage your Seattle trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 6/12
Sat 13/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States