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Cheap flights from Seattle to Belfast from £514

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Belfast departing on 4/10. 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 return flights

Logo
19:00 - 20:25SEA-BHD
17h 25m2 stops
Logo
07:00 - 20:40BHD-SEA
21h 40m2 stops
£514
Find Deal
Sat, 4 Oct - Sat, 11 Oct
Logo
15:45 - 20:35SEA-BHD
20h 50m2 stops
Logo
11:10 - 20:40BHD-SEA
17h 30m2 stops
£538
Find Deal
Wed, 24 Sep - Sat, 4 Oct
British Airways Logo
13:30 - 11:30SEA-BHD
14h 00m1 stop
British Airways Logo
11:05 - 17:55BHD-SEA
13h 50m1 stop
£543British Airways
Find Deal
Sun, 19 Oct - Thu, 30 Oct
British Airways Logo
19:50 - 16:35SEA-BHD
13h 45m1 stop
British Airways Logo
19:25 - 16:55BHD-SEA
29h 30m1 stop
£558British Airways
Find Deal
Wed, 29 Oct - Wed, 5 Nov
British Airways Logo
18:50 - 19:10SEA-BHD
16h 20m1 stop
British Airways Logo
19:25 - 21:56BHD-SEA
34h 31m2 stops
£561British Airways
Find Deal
Wed, 26 Nov - Tue, 2 Dec
British Airways Logo
13:30 - 11:55SEA-BHD
14h 25m1 stop
British Airways Logo
19:00 - 11:30BHD-SEA
24h 30m1 stop
£575British Airways
Find Deal
Wed, 24 Sep - Sat, 4 Oct
American Airlines Logo
00:59 - 10:15SEA-BHD
25h 16m2 stops
American Airlines Logo
15:05 - 16:55BHD-SEA
33h 50m1 stop
£694American Airlines
Find Deal
Tue, 25 Nov - Tue, 2 Dec
American Airlines Logo
00:59 - 10:15SEA-BHD
25h 16m2 stops
American Airlines Logo
15:05 - 21:56BHD-SEA
38h 51m2 stops
£708American Airlines
Find Deal
Tue, 25 Nov - Tue, 2 Dec
KLM Logo
11:15 - 16:50SEA-BHD
21h 35m2 stops
KLM Logo
06:30 - 11:50BHD-SEA
13h 20m1 stop
£742KLM
Find Deal
Wed, 3 Dec - Sun, 7 Dec
KLM Logo
13:45 - 16:50SEA-BHD
19h 05m2 stops
KLM Logo
06:30 - 16:20BHD-SEA
17h 50m2 stops
£821KLM
Find Deal
Thu, 27 Nov - Tue, 2 Dec

British Airways flights from Seattle to Belfast City Airport

Our best British Airways deals on Seattle to Belfast City Airport flight tickets
British Airways
19 Oct
SEA13:30Seattle/Tacoma Intl
14h 00m
1 stop
BHD11:30Belfast City
30 Oct
BHD11:05Belfast City
13h 50m
1 stop
SEA17:55Seattle/Tacoma Intl
£543
Find similar
British Airways
29 Oct
SEA19:50Seattle/Tacoma Intl
13h 45m
1 stop
BHD16:35Belfast City
5 Nov
BHD19:25Belfast City
29h 30m
1 stop
SEA16:55Seattle/Tacoma Intl
£558
Find similar
British Airways
26 Nov
SEA18:50Seattle/Tacoma Intl
16h 20m
1 stop
BHD19:10Belfast City
2 Dec
BHD19:25Belfast City
34h 31m
2 stops
SEA21:56Seattle/Tacoma Intl
£561
Find similar

KLM flights from Seattle to Belfast City Airport

Our best KLM deals on Seattle to Belfast City Airport flight tickets
KLM
3 Dec
SEA11:15Seattle/Tacoma Intl
21h 35m
2 stops
BHD16:50Belfast City
7 Dec
BHD06:30Belfast City
13h 20m
1 stop
SEA11:50Seattle/Tacoma Intl
£742
Find similar
KLM
27 Nov
SEA13:45Seattle/Tacoma Intl
19h 05m
2 stops
BHD16:50Belfast City
2 Dec
BHD06:30Belfast City
17h 50m
2 stops
SEA16:20Seattle/Tacoma Intl
£821
Find similar
KLM
27 Nov
SEA13:45Seattle/Tacoma Intl
19h 05m
2 stops
BHD16:50Belfast City
1 Dec
BHD06:30Belfast City
17h 50m
2 stops
SEA16:20Seattle/Tacoma Intl
£866
Find similar

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 8 August 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

Sat 4/10

19:00-20:25

2 stops17h 25m

Belfast City

Sat 11/10

07:00-20:40

2 stops21h 40m

£514

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 24/9

15:45-20:35

2 stops20h 50m

Belfast City

Sat 4/10

11:10-20:40

2 stops17h 30m

£538

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 19/10

13:30-11:30

1 stop14h 00m

Belfast City

Thu 30/10

11:05-17:55

1 stop13h 50m

£543

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 29/10

19:50-16:35

1 stop13h 45m

Belfast City

Wed 5/11

19:25-16:55

1 stop29h 30m

£558

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 26/11

18:50-19:10

1 stop16h 20m

Belfast City

Tue 2/12

19:25-21:56

2 stops34h 31m

£561

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 24/9

13:30-11:55

1 stop14h 25m

Belfast City

Sat 4/10

19:00-11:30

1 stop24h 30m

£575

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 25/11

00:59-10:15

2 stops25h 16m

Belfast City

Tue 2/12

15:05-16:55

1 stop33h 50m

£694

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 25/11

00:59-10:15

2 stops25h 16m

Belfast City

Tue 2/12

15:05-21:56

2 stops38h 51m

£708

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 3/12

11:15-16:50

2 stops21h 35m

Belfast City

Sun 7/12

06:30-11:50

1 stop13h 20m

£742

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 27/11

13:45-16:50

2 stops19h 05m

Belfast City

Tue 2/12

06:30-16:20

2 stops17h 50m

£821

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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 return 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

£514

Fastest flight time

12h 55m

Direct flights

None
The best flight deal from Seattle to Belfast City Airport found on momondo in the last 72 hours is £514
The fastest flight from Seattle to Belfast City Airport takes 12h 55m
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?

    A flight from Seattle/Tacoma Intl to Belfast City will travel around 4463.4 mi. By plane, this route typically takes 12h 55m.

  • 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 for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Belfast City Airport.

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

    The necessary travel and health documents for your Belfast City Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

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

Travelling to a place near Belfast?

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

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?

All flight searches from Seattle to Belfast on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Belfast from Seattle.

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

Yes momondo offers price alerts on flights to Belfast from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Belfast City Airport trip

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