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Cheap flights from Seattle to Belfast from $481

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 9/2. 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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Find the cheapest flights from Seattle to Belfast (SEA-BHD)

Cheap round-trip flights

British Airways Logo
8:20 pm - 5:30 pmSEA-BHD
13h 10m1 stop
British Airways Logo
7:30 pm - 11:10 amBHD-SEA
23h 40m1 stop
$723British Airways
Find Deal
Mon, Sep 22 - Mon, Oct 6
British Airways Logo
3:00 pm - 3:35 pmSEA-BHD
16h 35m2 stops
British Airways Logo
8:20 pm - 11:35 amBHD-SEA
23h 15m1 stop
$740British Airways
Find Deal
Wed, Sep 3 - Tue, Sep 9
British Airways Logo
3:00 pm - 3:35 pmSEA-BHD
16h 35m2 stops
British Airways Logo
8:20 pm - 8:09 pmBHD-SEA
31h 49m2 stops
$746British Airways
Find Deal
Wed, Sep 3 - Tue, Sep 9
American Airlines Logo
3:00 pm - 3:40 pmSEA-BHD
16h 40m2 stops
American Airlines Logo
1:50 pm - 11:10 amBHD-SEA
29h 20m1 stop
$808American Airlines
Find Deal
Mon, Sep 22 - Mon, Oct 6
KLM Logo
2:10 pm - 4:55 pmSEA-BHD
18h 45m1 stop
KLM Logo
6:30 am - 11:45 amBHD-SEA
13h 15m1 stop
$815KLM
Find Deal
Wed, Sep 3 - Tue, Sep 9
Delta Logo
2:10 pm - 9:15 pmSEA-BHD
23h 05m1 stop
Delta Logo
5:25 pm - 11:45 amBHD-SEA
26h 20m1 stop
$865Delta
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Wed, Sep 3 - Sun, Sep 7
Virgin Atlantic Logo
7:20 am - 9:00 pmSEA-BHD
29h 40m2 stops
Virgin Atlantic Logo
6:30 am - 11:50 amBHD-SEA
13h 20m1 stop
$869Virgin Atlantic
Find Deal
Wed, Dec 3 - Sun, Dec 7
Virgin Atlantic Logo
7:20 am - 9:00 pmSEA-BHD
29h 40m2 stops
Virgin Atlantic Logo
5:20 pm - 2:45 pmBHD-SEA
29h 25m2 stops
$879Virgin Atlantic
Find Deal
Wed, Dec 3 - Sun, Dec 7
Delta Logo
3:05 pm - 4:50 pmSEA-BHD
17h 45m1 stop
Delta Logo
5:20 pm - 11:50 amBHD-SEA
26h 30m1 stop
$894Delta
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Tue, Dec 23 - Mon, Jan 12
American Airlines Logo
3:00 pm - 3:35 pmSEA-BHD
16h 35m2 stops
American Airlines Logo
6:35 am - 11:35 amBHD-SEA
13h 00m1 stop
$931American Airlines
Find Deal
Wed, Sep 3 - Fri, Sep 12

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 22
SEA8:20 pmSeattle/Tacoma Intl
13h 10m
1 stop
BHD5:30 pmBelfast City
Oct 6
BHD7:30 pmBelfast City
23h 40m
1 stop
SEA11:10 amSeattle/Tacoma Intl
$723
Find similar
British Airways
Sep 3
SEA3:00 pmSeattle/Tacoma Intl
16h 35m
2 stops
BHD3:35 pmBelfast City
Sep 9
BHD8:20 pmBelfast City
23h 15m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$740
Find similar
British Airways
Sep 3
SEA3:00 pmSeattle/Tacoma Intl
16h 35m
2 stops
BHD3:35 pmBelfast City
Sep 9
BHD8:20 pmBelfast City
31h 49m
2 stops
SEA8:09 pmSeattle/Tacoma Intl
$746
Find similar

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 22
SEA3:00 pmSeattle/Tacoma Intl
16h 40m
2 stops
BHD3:40 pmBelfast City
Oct 6
BHD1:50 pmBelfast City
29h 20m
1 stop
SEA11:10 amSeattle/Tacoma Intl
$808
Find similar
American Airlines
Sep 3
SEA3:00 pmSeattle/Tacoma Intl
16h 35m
2 stops
BHD3:35 pmBelfast City
Sep 12
BHD6:35 amBelfast City
13h 00m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$931
Find similar
American Airlines
Sep 3
SEA10:11 amSeattle/Tacoma Intl
21h 24m
2 stops
BHD3:35 pmBelfast City
Sep 12
BHD6:35 amBelfast City
23h 29m
2 stops
SEA10:04 pmSeattle/Tacoma Intl
$949
Find similar

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 August 12, 2025.
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

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 9/22

8:20 pm-5:30 pm

1 stop13h 10m

Belfast City

Mon 10/6

7:30 pm-11:10 am

1 stop23h 40m

$723

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 9/3

3:00 pm-3:35 pm

2 stops16h 35m

Belfast City

Tue 9/9

8:20 pm-11:35 am

1 stop23h 15m

$740

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 9/3

3:00 pm-3:35 pm

2 stops16h 35m

Belfast City

Tue 9/9

8:20 pm-8:09 pm

2 stops31h 49m

$746

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 9/22

3:00 pm-3:40 pm

2 stops16h 40m

Belfast City

Mon 10/6

1:50 pm-11:10 am

1 stop29h 20m

$808

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 9/3

2:10 pm-4:55 pm

1 stop18h 45m

Belfast City

Tue 9/9

6:30 am-11:45 am

1 stop13h 15m

$815

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 9/3

2:10 pm-9:15 pm

1 stop23h 05m

Belfast City

Sun 9/7

5:25 pm-11:45 am

1 stop26h 20m

$865

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 12/3

7:20 am-9:00 pm

2 stops29h 40m

Belfast City

Sun 12/7

6:30 am-11:50 am

1 stop13h 20m

$869

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 12/3

7:20 am-9:00 pm

2 stops29h 40m

Belfast City

Sun 12/7

5:20 pm-2:45 pm

2 stops29h 25m

$879

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 12/23

3:05 pm-4:50 pm

1 stop17h 45m

Belfast City

Mon 1/12

5:20 pm-11:50 am

1 stop26h 30m

$894

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 9/3

3:00 pm-3:35 pm

2 stops16h 35m

Belfast City

Fri 9/12

6:35 am-11:35 am

1 stop13h 00m

$931

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 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 day to depart on your flight to Belfast City Airport?

On average, the least expensive day to fly to Belfast City Airport from Seattle is on a Thursday. momondo users have found tickets for Thursday departures for as low as $782. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Friday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $794.

What is the cheapest time of day to depart on your flight to Belfast City Airport?

According to our data, the cheapest time of day to fly to Belfast City Airport is in the evening. momondo users have found flights departing from Seattle to Belfast City Airport in the evening for as low as $772. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $782.

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

Best Price Found

$481

Fastest flight time

13h 10m

Direct flights

None
The best one-way flight to Belfast City Airport from Seattle in the past 72 hours is $481. The best round-trip flight deal from Seattle to Belfast City Airport found on momondo in the last 72 hours is $723.
The fastest flight from Seattle to Belfast City Airport takes 13h 10m
There are no direct flights from Seattle to Belfast City Airport. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - 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 13h 10m.

  • 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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