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Cheap flights from Seattle to Belfast from $318

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:30 am - 6:25 pmSEA  Seattle/Tacoma Intl-BFS Belfast Intl
23h 55m2 stops Calgary Edinburgh Turnhouse
Multiple Airlines Logo
11:10 am - 7:00 pmBFS  Belfast Intl-SEA Seattle/Tacoma Intl
15h 50m1 stop London Stansted
$948Multiple Airlines
Sun, Oct 18 - Sat, Oct 24
Multiple Airlines Logo
7:00 pm - 8:35 pmSEA  Seattle/Tacoma Intl-BFS Belfast Intl
17h 35m2 stops Reykjavik Keflavik Intl London Gatwick
Multiple Airlines Logo
9:10 pm - 4:55 pmBFS  Belfast Intl-SEA Seattle/Tacoma Intl
26h 45m3 stops London Luton Barcelona-El Prat Frankfurt am Main
$1,009Multiple Airlines
Thu, Oct 15 - Wed, Oct 28
Multiple Airlines Logo
3:40 pm - 9:50 pmSEA  Seattle/Tacoma Intl-BFS Belfast Intl
22h 10m2 stops Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
8:15 pm - 2:00 pmBFS  Belfast Intl-SEA Seattle/Tacoma Intl
25h 45m2 stops London Stansted Munich Franz Josef Strauss
$1,049Multiple Airlines
Sun, Oct 18 - Sat, Oct 24
Multiple Airlines Logo
5:50 am - 4:30 pmSEA  Seattle/Tacoma Intl-BFS Belfast Intl
26h 40m3 stops Vancouver Intl Calgary Edinburgh Turnhouse
Multiple Airlines Logo
8:30 am - 8:40 pmBFS  Belfast Intl-SEA Seattle/Tacoma Intl
20h 10m2 stops London Gatwick Reykjavik Keflavik Intl
$1,056Multiple Airlines
Fri, Oct 16 - Fri, Oct 23
Multiple Airlines Logo
10:30 am - 6:25 pmSEA  Seattle/Tacoma Intl-BFS Belfast Intl
23h 55m2 stops Calgary Edinburgh Turnhouse
Multiple Airlines Logo
6:55 am - 10:47 pmBFS  Belfast Intl-SEA Seattle/Tacoma Intl
23h 52m3 stops Edinburgh Turnhouse Calgary Vancouver Intl
$1,074Multiple Airlines
Sun, Oct 18 - Sat, Oct 24
Multiple Airlines Logo
6:50 pm - 8:45 pmSEA  Seattle/Tacoma Intl-BFS Belfast Intl
17h 55m2 stops Munich Franz Josef Strauss Edinburgh Turnhouse
Multiple Airlines Logo
9:40 am - 12:20 pmBFS  Belfast Intl-SEA Seattle/Tacoma Intl
34h 40m2 stops Edinburgh Turnhouse Frankfurt am Main
$1,092Multiple Airlines
Fri, Oct 16 - Fri, Oct 23
Multiple Airlines Logo
5:50 am - 9:40 amSEA  Seattle/Tacoma Intl-BFS Belfast Intl
19h 50m3 stops Vancouver Intl Toronto Pearson Intl Manchester
Multiple Airlines Logo
11:05 pm - 4:55 pmBFS  Belfast Intl-SEA Seattle/Tacoma Intl
24h 50m3 stops Alicante Barcelona-El Prat Frankfurt am Main
$1,194Multiple Airlines
Thu, Oct 15 - Wed, Oct 28
Multiple Airlines Logo
7:00 pm - 8:35 pmSEA  Seattle/Tacoma Intl-BFS Belfast Intl
17h 35m2 stops Reykjavik Keflavik Intl London Gatwick
Multiple Airlines Logo
7:40 am - 6:00 pmBFS  Belfast Intl-SEA Seattle/Tacoma Intl
17h 20m2 stops Manchester Reykjavik Keflavik Intl
$1,202Multiple Airlines
Thu, Oct 15 - Wed, Oct 28

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Use the filters below to find and compare flights from Seattle to Belfast Intl Airport that are best for you.

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Route

Depart

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Price

Cheapest round-trip

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Sun 10/18

10:30 am-6:25 pm

2 stops23h 55m

Belfast Intl

Sat 10/24

11:10 am-7:00 pm

1 stop15h 50m

$948

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Thu 10/15

7:00 pm-8:35 pm

2 stops17h 35m

Belfast Intl

Wed 10/28

9:10 pm-4:55 pm

3 stops26h 45m

$1,009

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Sun 10/18

3:40 pm-9:50 pm

2 stops22h 10m

Belfast Intl

Sat 10/24

8:15 pm-2:00 pm

2 stops25h 45m

$1,049

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Fri 10/16

5:50 am-4:30 pm

3 stops26h 40m

Belfast Intl

Fri 10/23

8:30 am-8:40 pm

2 stops20h 10m

$1,056

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Sun 10/18

10:30 am-6:25 pm

2 stops23h 55m

Belfast Intl

Sat 10/24

6:55 am-10:47 pm

3 stops23h 52m

$1,074

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Fri 10/16

6:50 pm-8:45 pm

2 stops17h 55m

Belfast Intl

Fri 10/23

9:40 am-12:20 pm

2 stops34h 40m

$1,092

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Thu 10/15

5:50 am-9:40 am

3 stops19h 50m

Belfast Intl

Wed 10/28

11:05 pm-4:55 pm

3 stops24h 50m

$1,194
Quickest round-trip

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Thu 10/15

7:00 pm-8:35 pm

2 stops17h 35m

Belfast Intl

Wed 10/28

7:40 am-6:00 pm

2 stops17h 20m

$1,202
Cheapest one-way
Quickest one-way

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Sat 10/24

7:10 pm-7:55 am

3 stops53h 45m

$318

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Sat 10/24

7:10 pm-7:55 am

2 stops53h 45m

$351

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Seattle to Belfast Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Belfast Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Belfast Intl Airport (SEA to BFS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Belfast Intl Airport

Best Price Found

$318

Fastest flight time

14h 05m

Direct flights

None
The best one-way flight to Belfast Intl Airport from Seattle in the past 72 hours is $318. The best round-trip flight deal from Seattle to Belfast Intl Airport found on momondo in the last 72 hours is $948.
The fastest flight from Seattle to Belfast Intl Airport takes 14h 05m
There are no direct flights from Seattle to Belfast Intl Airport. There are no popular flight routes from Seattle to Belfast Intl Airport.
Search flight deals

Frequently asked questions about flying from Seattle to Belfast Intl Airport

  • How far is Seattle/Tacoma Intl to Belfast Intl by plane?

    Belfast Intl is 4452.2 mi away from Seattle/Tacoma Intl. By plane, this route typically takes 14h 05m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Belfast Intl Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Belfast Intl Airport are refreshed on a daily basis.

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

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Belfast Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Belfast Intl Airport.

  • What documentation or ID do you need to fly to Belfast Intl Airport?

    The travel and health documents required for your trip to Belfast 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 Belfast Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Seattle to Belfast Intl Airport?

Best airlines flying from Seattle to Belfast Intl Airport

Compare and see reviews for airlines that fly from Seattle to Belfast Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $822Free CancellationRating
6.7
8,224 reviews
Search British Airways flights

Frequently asked questions about flying from Seattle to Belfast Intl Airport

  • How do I get Price Alerts for flights from Seattle to Belfast Intl Airport?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Seattle from Belfast Intl Airport. 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 Seattle to Belfast Intl Airport 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?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Traveling to a place near Belfast?

Book flights to Belfast if you plan to visit one of these locations
Armagh
Ballymena
Newry
Dungannon

Why use momondo?

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

It is quick and easy to find Seattle to Belfast flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Belfast that suits you.

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

Flights from Seattle to Belfast with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seattle to Belfast?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Belfast.

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

Yes. momondo can track prices for Seattle to Belfast flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Belfast Intl Airport trip

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