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Cheap flights from Seattle to Belfast from $263

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Belfast departing on 4/16. 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
1 adult, Economy, 0 bags

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Find the cheapest flights from Seattle to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
8:20 pm - 6:55 pm
SEA
-
BHD
14h 35m
1 stop
British Airways Logo
9:40 am - 6:25 pm
BHD
-
SEA
16h 45m
1 stop
$839British Airways
Tue, Sep 1 - Tue, Sep 22
British Airways Logo
8:20 pm - 8:35 pm
SEA
-
BHD
16h 15m
1 stop
British Airways Logo
6:30 am - 11:35 am
BHD
-
SEA
13h 05m
1 stop
$886British Airways
Wed, Sep 2 - Sun, Sep 6
British Airways Logo
8:20 pm - 5:40 pm
SEA
-
BHD
13h 20m
1 stop
British Airways Logo
8:10 pm - 11:35 am
BHD
-
SEA
23h 25m
1 stop
$897British Airways
Sun, Apr 12 - Sun, Apr 19
British Airways Logo
8:20 pm - 7:40 pm
SEA
-
BHD
15h 20m
1 stop
British Airways Logo
9:40 am - 10:51 pm
BHD
-
SEA
21h 11m
2 stops
$913British Airways
Tue, Sep 1 - Tue, Sep 22
British Airways Logo
1:30 pm - 1:35 pm
SEA
-
BHD
16h 05m
1 stop
British Airways Logo
7:10 pm - 6:25 pm
BHD
-
SEA
31h 15m
1 stop
$916British Airways
Wed, Apr 29 - Sun, May 3
Multiple Airlines Logo
8:20 pm - 6:45 pm
SEA
-
BHD
14h 25m
1 stop
Multiple Airlines Logo
1:10 pm - 12:54 am
BHD
-
SEA
19h 44m
2 stops
$922Multiple Airlines
Wed, Sep 2 - Sun, Sep 6
Multiple Airlines Logo
8:20 pm - 6:45 pm
SEA
-
BHD
14h 25m
1 stop
Multiple Airlines Logo
11:00 am - 10:38 pm
BHD
-
SEA
19h 38m
2 stops
$927Multiple Airlines
Sun, Apr 12 - Sun, Apr 19
Multiple Airlines Logo
5:40 pm - 4:55 pm
SEA
-
BHD
15h 15m
1 stop
Multiple Airlines Logo
9:50 am - 11:42 am
BHD
-
SEA
33h 52m
1 stop
$935Multiple Airlines
Thu, May 7 - Wed, May 20
Multiple Airlines Logo
7:00 pm - 6:40 pm
SEA
-
BHD
15h 40m
2 stops
Multiple Airlines Logo
7:00 am - 8:40 pm
BHD
-
SEA
21h 40m
2 stops
$938Multiple Airlines
Thu, May 7 - Wed, May 20
KLM Logo
7:15 am - 9:20 am
SEA
-
BHD
18h 05m
2 stops
KLM Logo
9:50 am - 11:42 am
BHD
-
SEA
33h 52m
1 stop
$939KLM
Thu, May 7 - Wed, May 20

British Airways flights from Seattle to Belfast City Airport

Our best British Airways deals on Seattle to Belfast City Airport flight tickets
British Airways
Sep 1
SEA8:20 pmSeattle/Tacoma Intl
14h 35m
1 stop
BHD6:55 pmBelfast City
Sep 22
BHD9:40 amBelfast City
16h 45m
1 stop
SEA6:25 pmSeattle/Tacoma Intl
$839
British Airways
Sep 2
SEA8:20 pmSeattle/Tacoma Intl
16h 15m
1 stop
BHD8:35 pmBelfast City
Sep 9
BHD7:40 pmBelfast City
23h 55m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$840
British Airways
Sep 2
SEA8:20 pmSeattle/Tacoma Intl
16h 15m
1 stop
BHD8:35 pmBelfast City
Sep 9
BHD7:40 pmBelfast City
31h 09m
2 stops
SEA6:49 pmSeattle/Tacoma Intl
$882

American Airlines flights from Seattle to Belfast City Airport

Our best American Airlines deals on Seattle to Belfast City Airport flight tickets
American Airlines
Sep 2
SEA1:32 pmSeattle/Tacoma Intl
16h 03m
2 stops
BHD1:35 pmBelfast City
Sep 9
BHD6:30 amBelfast City
18h 59m
2 stops
SEA5:29 pmSeattle/Tacoma Intl
$943
American Airlines
Apr 16
SEA1:19 pmSeattle/Tacoma Intl
18h 11m
2 stops
BHD3:30 pmBelfast City
May 3
BHD11:00 amBelfast City
19h 38m
2 stops
SEA10:38 pmSeattle/Tacoma Intl
$979
American Airlines
Sep 2
SEA3:10 pmSeattle/Tacoma Intl
16h 30m
2 stops
BHD3:40 pmBelfast City
Sep 6
BHD11:00 amBelfast City
19h 20m
2 stops
SEA10:20 pmSeattle/Tacoma Intl
$1,000

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Belfast City Airport 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 832,500 searches. Data last updated March 20, 2026.
Use the filters below to find and compare flights from Seattle to Belfast City Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 9/1

8:20 pm-6:55 pm

1 stop14h 35m

Belfast City

Tue 9/22

9:40 am-6:25 pm

1 stop16h 45m

$839
Quickest round-trip

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 9/2

8:20 pm-8:35 pm

1 stop16h 15m

Belfast City

Sun 9/6

6:30 am-11:35 am

1 stop13h 05m

$886

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 4/12

8:20 pm-5:40 pm

1 stop13h 20m

Belfast City

Sun 4/19

8:10 pm-11:35 am

1 stop23h 25m

$897

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 9/1

8:20 pm-7:40 pm

1 stop15h 20m

Belfast City

Tue 9/22

9:40 am-10:51 pm

2 stops21h 11m

$913

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 4/29

1:30 pm-1:35 pm

1 stop16h 05m

Belfast City

Sun 5/3

7:10 pm-6:25 pm

1 stop31h 15m

$916

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 9/2

8:20 pm-6:45 pm

1 stop14h 25m

Belfast City

Sun 9/6

1:10 pm-12:54 am

2 stops19h 44m

$922

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 4/12

8:20 pm-6:45 pm

1 stop14h 25m

Belfast City

Sun 4/19

11:00 am-10:38 pm

2 stops19h 38m

$927

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 5/7

5:40 pm-4:55 pm

1 stop15h 15m

Belfast City

Wed 5/20

9:50 am-11:42 am

1 stop33h 52m

$935

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 5/7

7:00 pm-6:40 pm

2 stops15h 40m

Belfast City

Wed 5/20

7:00 am-8:40 pm

2 stops21h 40m

$938

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 5/7

7:15 am-9:20 am

2 stops18h 05m

Belfast City

Wed 5/20

9:50 am-11:42 am

1 stop33h 52m

$939

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Belfast from

How to get the cheapest flight ticket from Seattle to Belfast City Airport

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 Seattle/Tacoma Intl to Belfast City?

British Airways is the most popular carrier operating from Seattle/Tacoma Intl to Belfast City

When to book flights from Seattle to Belfast City Airport

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

Cheap Seattle to Belfast City Airport (SEA to BHD) flight deals and tips

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

Fastest flight time

12h 40m

Direct flights

None
The fastest flight from Seattle to Belfast City Airport takes 12h 40m
There are no direct flights from Seattle to Belfast City Airport. There are no popular flight routes from Seattle to Belfast City Airport.
Search flight deals

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

    Belfast City is 4463.4 mi away from Seattle/Tacoma Intl. In terms of flight time, this usually takes a little over 12h 40m.

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Belfast City Airport.

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

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

Traveling to a place near Belfast?

Book flights to Belfast if you plan to visit one of these locations
Newcastle
Bangor

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to Belfast. momondo saves you time and could save you money on your trip.

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?

Price alerts on flights to Belfast from Seattle 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 Belfast City Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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