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Cheap flights from Seattle to Belfast from $624

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Belfast departing on 3/7. 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

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
6:50 pm - 7:40 pm
SEA
-
BHD
16h 50m
1 stop
British Airways Logo
8:45 am - 5:55 pm
BHD
-
SEA
16h 10m
1 stop
$624British Airways
Sat, Mar 7 - Tue, Mar 17
British Airways Logo
6:50 pm - 4:45 pm
SEA
-
BHD
13h 55m
1 stop
British Airways Logo
11:25 am - 5:55 pm
BHD
-
SEA
13h 30m
1 stop
$625British Airways
Sat, Mar 7 - Tue, Mar 17
British Airways Logo
1:35 pm - 2:15 pm
SEA
-
BHD
16h 40m
1 stop
British Airways Logo
11:25 am - 12:24 am
BHD
-
SEA
19h 59m
2 stops
$627British Airways
Sat, Mar 7 - Tue, Mar 17
British Airways Logo
6:50 pm - 4:35 pm
SEA
-
BHD
13h 45m
1 stop
British Airways Logo
8:25 pm - 5:55 pm
BHD
-
SEA
28h 30m
1 stop
$630British Airways
Wed, Mar 4 - Sun, Mar 8
British Airways Logo
6:50 pm - 4:45 pm
SEA
-
BHD
13h 55m
1 stop
British Airways Logo
5:40 pm - 5:55 pm
BHD
-
SEA
31h 15m
1 stop
$646British Airways
Sat, Mar 7 - Wed, Mar 18
British Airways Logo
1:29 pm - 6:45 pm
SEA
-
BHD
21h 16m
2 stops
British Airways Logo
6:30 am - 11:35 am
BHD
-
SEA
13h 05m
1 stop
$648British Airways
Sun, May 3 - Tue, May 12
British Airways Logo
1:29 pm - 6:45 pm
SEA
-
BHD
21h 16m
2 stops
British Airways Logo
6:30 am - 10:26 pm
BHD
-
SEA
23h 56m
2 stops
$651British Airways
Sun, May 3 - Tue, May 12
Multiple Airlines Logo
5:30 pm - 4:55 pm
SEA
-
BHD
15h 25m
1 stop
Multiple Airlines Logo
9:50 am - 4:30 pm
BHD
-
SEA
14h 40m
1 stop
$665Multiple Airlines
Sun, May 3 - Tue, May 12
British Airways Logo
6:50 pm - 4:35 pm
SEA
-
BHD
13h 45m
1 stop
British Airways Logo
3:10 pm - 4:55 pm
BHD
-
SEA
33h 45m
1 stop
$733British Airways
Wed, Feb 25 - Sun, Mar 1
British Airways Logo
6:50 pm - 7:30 am
SEA
-
BHD
28h 40m
1 stop
British Airways Logo
5:35 pm - 4:55 pm
BHD
-
SEA
31h 20m
1 stop
$739British Airways
Wed, Feb 25 - Sun, Mar 1

British Airways flights from Seattle to Belfast City Airport

Our best British Airways deals on Seattle to Belfast City Airport flight tickets
British Airways
Mar 7
SEA6:50 pmSeattle/Tacoma Intl
16h 50m
1 stop
BHD7:40 pmBelfast City
Mar 17
BHD8:45 amBelfast City
16h 10m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
$624
British Airways
Mar 7
SEA6:50 pmSeattle/Tacoma Intl
13h 55m
1 stop
BHD4:45 pmBelfast City
Mar 17
BHD11:25 amBelfast City
13h 30m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
$625
British Airways
Mar 7
SEA1:35 pmSeattle/Tacoma Intl
16h 40m
1 stop
BHD2:15 pmBelfast City
Mar 17
BHD11:25 amBelfast City
19h 59m
2 stops
SEA12:24 amSeattle/Tacoma Intl
$627

Aer Lingus flights from Seattle to Belfast City Airport

Our best Aer Lingus deals on Seattle to Belfast City Airport flight tickets
Aer Lingus
Jul 15
SEA1:35 pmSeattle/Tacoma Intl
14h 25m
1 stop
BHD12:00 pmBelfast City
Jul 18
BHD7:15 amBelfast City
17h 55m
2 stops
SEA5:10 pmSeattle/Tacoma Intl
$6,466
Aer Lingus
Jul 15
SEA6:55 pmSeattle/Tacoma Intl
14h 50m
2 stops
BHD5:45 pmBelfast City
Jul 18
BHD7:05 pmBelfast City
30h 05m
2 stops
SEA5:10 pmSeattle/Tacoma Intl
$6,949
Aer Lingus
Jul 15
SEA6:55 pmSeattle/Tacoma Intl
14h 50m
2 stops
BHD5:45 pmBelfast City
Jul 18
BHD6:00 pmBelfast City
31h 10m
2 stops
SEA5:10 pmSeattle/Tacoma Intl
$7,185

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 January 29, 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

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

6:50 pm-7:40 pm

1 stop16h 50m

Belfast City

Tue 3/17

8:45 am-5:55 pm

1 stop16h 10m

$624

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

6:50 pm-4:45 pm

1 stop13h 55m

Belfast City

Tue 3/17

11:25 am-5:55 pm

1 stop13h 30m

$625

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

1:35 pm-2:15 pm

1 stop16h 40m

Belfast City

Tue 3/17

11:25 am-12:24 am

2 stops19h 59m

$627

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 3/4

6:50 pm-4:35 pm

1 stop13h 45m

Belfast City

Sun 3/8

8:25 pm-5:55 pm

1 stop28h 30m

$630

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

6:50 pm-4:45 pm

1 stop13h 55m

Belfast City

Wed 3/18

5:40 pm-5:55 pm

1 stop31h 15m

$646

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 5/3

1:29 pm-6:45 pm

2 stops21h 16m

Belfast City

Tue 5/12

6:30 am-11:35 am

1 stop13h 05m

$648

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 5/3

1:29 pm-6:45 pm

2 stops21h 16m

Belfast City

Tue 5/12

6:30 am-10:26 pm

2 stops23h 56m

$651

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 5/3

5:30 pm-4:55 pm

1 stop15h 25m

Belfast City

Tue 5/12

9:50 am-4:30 pm

1 stop14h 40m

$665

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 2/25

6:50 pm-4:35 pm

1 stop13h 45m

Belfast City

Sun 3/1

3:10 pm-4:55 pm

1 stop33h 45m

$733

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 2/25

6:50 pm-7:30 am

1 stop28h 40m

Belfast City

Sun 3/1

5:35 pm-4:55 pm

1 stop31h 20m

$739

Flights are sorted by cheapest round-trip 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 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 35m

Direct flights

None
The fastest flight from Seattle to Belfast City Airport takes 12h 35m
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 35m.

  • 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.

  • 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.

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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