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Cheap flights from Seattle to Belfast from $847

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
7:00 pm - 4:20 pmSEA  Seattle/Tacoma Intl-BFS Belfast Intl
13h 20m2 stops Reykjavik Keflavik Intl Glasgow Intl
Multiple Airlines Logo
8:35 am - 6:00 pmBFS  Belfast Intl-SEA Seattle/Tacoma Intl
16h 25m2 stops Glasgow Intl Reykjavik Keflavik Intl
$847Multiple Airlines
Tue, Oct 20 - Tue, Oct 27
British Airways Logo
6:45 pm - 4:50 pmSEA  Seattle/Tacoma Intl-BHD Belfast City
14h 05m1 stop London Heathrow
British Airways Logo
11:05 am - 4:50 pmBHD  Belfast City-SEA Seattle/Tacoma Intl
13h 45m1 stop London Heathrow
$918British Airways
Sun, Jan 17 - Thu, Jan 21
British Airways Logo
6:45 pm - 4:50 pmSEA  Seattle/Tacoma Intl-BHD Belfast City
14h 05m1 stop London Heathrow
British Airways Logo
11:05 am - 4:50 pmBHD  Belfast City-SEA Seattle/Tacoma Intl
13h 45m1 stop London Heathrow
$919British Airways
Sun, Jan 17 - Thu, Jan 21
Aer Lingus Logo
8:20 pm - 5:30 pmSEA  Seattle/Tacoma Intl-BHD Belfast City
13h 10m1 stop London Heathrow
Aer Lingus Logo
9:35 am - 6:25 pmBHD  Belfast City-SEA Seattle/Tacoma Intl
16h 50m1 stop London Heathrow
$942Aer Lingus
Mon, Oct 5 - Thu, Oct 22
Multiple Airlines Logo
3:40 pm - 10:30 pmSEA  Seattle/Tacoma Intl-BFS Belfast Intl
22h 50m3 stops Reykjavik Keflavik Intl Kastrup Copenhagen Bristol
Multiple Airlines Logo
9:25 am - 8:40 pmBFS  Belfast Intl-SEA Seattle/Tacoma Intl
18h 15m2 stops London Gatwick Reykjavik Keflavik Intl
$954Multiple Airlines
Sun, Oct 18 - Sun, Oct 25
British Airways Logo
8:20 pm - 7:25 pmSEA  Seattle/Tacoma Intl-BHD Belfast City
15h 05m1 stop London Heathrow
British Airways Logo
12:45 pm - 6:25 pmBHD  Belfast City-SEA Seattle/Tacoma Intl
13h 40m1 stop London Heathrow
$955British Airways
Mon, Oct 5 - Thu, Oct 22
British Airways Logo
8:20 pm - 7:25 pmSEA  Seattle/Tacoma Intl-BHD Belfast City
15h 05m1 stop London Heathrow
British Airways Logo
12:45 pm - 6:25 pmBHD  Belfast City-SEA Seattle/Tacoma Intl
13h 40m1 stop London Heathrow
$956British Airways
Mon, Oct 5 - Thu, Oct 22
Multiple Airlines Logo
7:00 pm - 4:20 pmSEA  Seattle/Tacoma Intl-BFS Belfast Intl
13h 20m2 stops Reykjavik Keflavik Intl Glasgow Intl
Multiple Airlines Logo
5:05 pm - 6:00 pmBFS  Belfast Intl-SEA Seattle/Tacoma Intl
31h 55m3 stops London Stansted Oslo Gardermoen Reykjavik Keflavik Intl
$965Multiple Airlines
Tue, Oct 20 - Tue, Oct 27
American Airlines Logo
3:14 pm - 3:30 pmSEA  Seattle/Tacoma Intl-BHD Belfast City
16h 16m2 stops Chicago O'Hare Intl London Heathrow
American Airlines Logo
2:20 pm - 11:35 amBHD  Belfast City-SEA Seattle/Tacoma Intl
29h 15m1 stop London Heathrow
$972American Airlines
Mon, Oct 5 - Thu, Oct 22
American Airlines Logo
3:14 pm - 3:30 pmSEA  Seattle/Tacoma Intl-BHD Belfast City
16h 16m2 stops Chicago O'Hare Intl London Heathrow
American Airlines Logo
2:20 pm - 11:35 amBHD  Belfast City-SEA Seattle/Tacoma Intl
29h 15m1 stop London Heathrow
$973American Airlines
Mon, Oct 5 - Thu, Oct 22

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American Airlines flights from Seattle to Belfast

Our best American Airlines deals on Seattle to Belfast flight tickets
American Airlines
Oct 5
SEA3:14 pmSeattle/Tacoma Intl
16h 16m
2 stops
BHD3:30 pmBelfast City
Oct 22
BHD2:20 pmBelfast City
29h 15m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$972
American Airlines
Oct 5
SEA3:14 pmSeattle/Tacoma Intl
16h 16m
2 stops
BHD3:30 pmBelfast City
Oct 22
BHD2:20 pmBelfast City
29h 15m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$973
American Airlines
Oct 5
SEA3:14 pmSeattle/Tacoma Intl
16h 16m
2 stops
BHD3:30 pmBelfast City
Oct 22
BHD2:20 pmBelfast City
29h 15m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$974

British Airways flights from Seattle to Belfast

Our best British Airways deals on Seattle to Belfast flight tickets
British Airways
Jan 17
SEA6:45 pmSeattle/Tacoma Intl
14h 05m
1 stop
BHD4:50 pmBelfast City
Jan 21
BHD11:05 amBelfast City
13h 45m
1 stop
SEA4:50 pmSeattle/Tacoma Intl
$918
British Airways
Jan 17
SEA6:45 pmSeattle/Tacoma Intl
14h 05m
1 stop
BHD4:50 pmBelfast City
Jan 21
BHD11:05 amBelfast City
13h 45m
1 stop
SEA4:50 pmSeattle/Tacoma Intl
$919
British Airways
Oct 5
SEA8:20 pmSeattle/Tacoma Intl
15h 05m
1 stop
BHD7:25 pmBelfast City
Oct 22
BHD12:45 pmBelfast City
13h 40m
1 stop
SEA6:25 pmSeattle/Tacoma Intl
$955

momondo Fare Finder

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

Fly from

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Route

Depart

Return

Price

Cheapest round-trip

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Tue 10/20

7:00 pm-4:20 pm

2 stops13h 20m

Belfast Intl

Tue 10/27

8:35 am-6:00 pm

2 stops16h 25m

$847
Quickest round-trip

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sun 1/17

6:45 pm-4:50 pm

1 stop14h 05m

Belfast City

Thu 1/21

11:05 am-4:50 pm

1 stop13h 45m

$918

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sun 1/17

6:45 pm-4:50 pm

1 stop14h 05m

Belfast City

Thu 1/21

11:05 am-4:50 pm

1 stop13h 45m

$919

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 10/5

8:20 pm-5:30 pm

1 stop13h 10m

Belfast City

Thu 10/22

9:35 am-6:25 pm

1 stop16h 50m

$942

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Sun 10/18

3:40 pm-10:30 pm

3 stops22h 50m

Belfast Intl

Sun 10/25

9:25 am-8:40 pm

2 stops18h 15m

$954

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 10/5

8:20 pm-7:25 pm

1 stop15h 05m

Belfast City

Thu 10/22

12:45 pm-6:25 pm

1 stop13h 40m

$955

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 10/5

8:20 pm-7:25 pm

1 stop15h 05m

Belfast City

Thu 10/22

12:45 pm-6:25 pm

1 stop13h 40m

$956

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Tue 10/20

7:00 pm-4:20 pm

2 stops13h 20m

Belfast Intl

Tue 10/27

5:05 pm-6:00 pm

3 stops31h 55m

$965

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 10/5

3:14 pm-3:30 pm

2 stops16h 16m

Belfast City

Thu 10/22

2:20 pm-11:35 am

1 stop29h 15m

$972

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 10/5

3:14 pm-3:30 pm

2 stops16h 16m

Belfast City

Thu 10/22

2:20 pm-11:35 am

1 stop29h 15m

$973

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

Cheap Seattle to Belfast flight deals and tips

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

Best Price Found

$847

Fastest flight time

14h 05m

Direct flights

None
The best flight deal from Seattle to Belfast found on momondo in the last 72 hours is $847
The fastest flight from Seattle to Belfast takes 14h 05m
There are no direct flights from Seattle to Belfast. There are no popular flight routes from Seattle to Belfast.
Search flight deals

Frequently asked questions about flying from Seattle to Belfast

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

    Belfast is 4463.0 mi away from Seattle/Tacoma Intl. In terms of flight time, this usually takes a little over 14h 05m.

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

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

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

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

    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.

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

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

Best airlines flying from Seattle to Belfast

Compare and see reviews for airlines that fly from Seattle to Belfast with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $822Free CancellationRating
6.7
8,209 reviews
Search British Airways flights

Frequently asked questions about flying from Seattle to Belfast

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

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

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Belfast. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo enables you to select and highlight flights to Belfast from Seattle with this policy.

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

momondo provides multiple filters to help you find the best flight to Belfast from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in Belfast

Belfast Intl Airport
Belfast City Airport