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Cheap flights from Seattle to Belfast from $333

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 8/17. 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
0 bags

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 - 6:45 pm
SEA
-
BHD
14h 25m
1 stop
British Airways Logo
6:30 am - 11:35 am
BHD
-
SEA
13h 05m
1 stop
$890British Airways
Mon, Oct 5 - Thu, Oct 22
British Airways Logo
1:30 pm - 6:55 pm
SEA
-
BHD
21h 25m
1 stop
British Airways Logo
12:40 pm - 6:25 pm
BHD
-
SEA
13h 45m
1 stop
$900British Airways
Tue, Sep 8 - Tue, Sep 29
British Airways Logo
1:30 pm - 12:55 pm
SEA
-
BHD
15h 25m
1 stop
British Airways Logo
4:05 pm - 6:25 pm
BHD
-
SEA
34h 20m
1 stop
$909British Airways
Mon, Oct 19 - Wed, Oct 21
British Airways Logo
11:34 am - 12:55 pm
SEA
-
BHD
17h 21m
2 stops
British Airways Logo
12:45 pm - 6:25 pm
BHD
-
SEA
13h 40m
1 stop
$913British Airways
Mon, Oct 5 - Thu, Oct 22
British Airways Logo
11:34 am - 12:55 pm
SEA
-
BHD
17h 21m
2 stops
British Airways Logo
9:35 am - 6:25 pm
BHD
-
SEA
16h 50m
1 stop
$914British Airways
Mon, Oct 5 - Thu, Oct 22
British Airways Logo
1:30 pm - 12:55 pm
SEA
-
BHD
15h 25m
1 stop
British Airways Logo
9:40 am - 8:52 pm
BHD
-
SEA
19h 12m
2 stops
$919British Airways
Mon, Aug 17 - Tue, Aug 25
British Airways Logo
11:34 am - 12:55 pm
SEA
-
BHD
17h 21m
2 stops
British Airways Logo
12:45 pm - 12:14 am
BHD
-
SEA
19h 29m
2 stops
$923British Airways
Mon, Oct 5 - Thu, Oct 22
British Airways Logo
11:34 am - 12:55 pm
SEA
-
BHD
17h 21m
2 stops
British Airways Logo
12:45 pm - 12:14 am
BHD
-
SEA
19h 29m
2 stops
$924British Airways
Mon, Oct 5 - Thu, Oct 22
British Airways Logo
1:30 pm - 3:30 pm
SEA
-
BHD
18h 00m
1 stop
British Airways Logo
8:25 pm - 11:35 am
BHD
-
SEA
23h 10m
1 stop
$929British Airways
Mon, Aug 17 - Tue, Aug 25
Multiple Airlines Logo
1:30 pm - 6:45 pm
SEA
-
BHD
21h 15m
1 stop
Multiple Airlines Logo
9:40 am - 10:26 pm
BHD
-
SEA
20h 46m
2 stops
$932Multiple Airlines
Mon, Aug 17 - Tue, Aug 25

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British Airways flights from Seattle to Belfast City Airport

Our best British Airways deals on Seattle to Belfast City Airport flight tickets
British Airways
Oct 5
SEA8:20 pmSeattle/Tacoma Intl
14h 25m
1 stop
BHD6:45 pmBelfast City
Oct 22
BHD6:30 amBelfast City
19h 55m
1 stop
SEA6:25 pmSeattle/Tacoma Intl
$890
British Airways
Oct 5
SEA8:20 pmSeattle/Tacoma Intl
14h 25m
1 stop
BHD6:45 pmBelfast City
Oct 22
BHD12:45 pmBelfast City
13h 40m
1 stop
SEA6:25 pmSeattle/Tacoma Intl
$891
British Airways
Sep 8
SEA1:30 pmSeattle/Tacoma Intl
21h 25m
1 stop
BHD6:55 pmBelfast City
Sep 29
BHD12:40 pmBelfast City
13h 45m
1 stop
SEA6:25 pmSeattle/Tacoma Intl
$900

Delta flights from Seattle to Belfast City Airport

Our best Delta deals on Seattle to Belfast City Airport flight tickets
Delta
Aug 9
SEA7:20 amSeattle/Tacoma Intl
18h 00m
2 stops
BHD9:20 amBelfast City
Aug 15
BHD9:50 amBelfast City
14h 37m
1 stop
SEA4:27 pmSeattle/Tacoma Intl
$1,111
Delta
Jun 2
SEA12:40 pmSeattle/Tacoma Intl
20h 15m
2 stops
BHD4:55 pmBelfast City
Jun 11
BHD9:50 amBelfast City
14h 34m
1 stop
SEA4:24 pmSeattle/Tacoma Intl
$1,120
Delta
Jul 1
SEA5:40 pmSeattle/Tacoma Intl
31h 40m
1 stop
BHD9:20 amBelfast City
Jul 7
BHD5:30 pmBelfast City
38h 28m
2 stops
SEA11:58 pmSeattle/Tacoma Intl
$1,162

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 May 5, 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
Quickest round-trip

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

8:20 pm-6:45 pm

1 stop14h 25m

Belfast City

Thu 10/22

6:30 am-11:35 am

1 stop13h 05m

$890

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 9/8

1:30 pm-6:55 pm

1 stop21h 25m

Belfast City

Tue 9/29

12:40 pm-6:25 pm

1 stop13h 45m

$900

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/19

1:30 pm-12:55 pm

1 stop15h 25m

Belfast City

Wed 10/21

4:05 pm-6:25 pm

1 stop34h 20m

$909

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

11:34 am-12:55 pm

2 stops17h 21m

Belfast City

Thu 10/22

12:45 pm-6:25 pm

1 stop13h 40m

$913

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

11:34 am-12:55 pm

2 stops17h 21m

Belfast City

Thu 10/22

9:35 am-6:25 pm

1 stop16h 50m

$914

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 8/17

1:30 pm-12:55 pm

1 stop15h 25m

Belfast City

Tue 8/25

9:40 am-8:52 pm

2 stops19h 12m

$919

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

11:34 am-12:55 pm

2 stops17h 21m

Belfast City

Thu 10/22

12:45 pm-12:14 am

2 stops19h 29m

$923

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 10/5

11:34 am-12:55 pm

2 stops17h 21m

Belfast City

Thu 10/22

12:45 pm-12:14 am

2 stops19h 29m

$924

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 8/17

1:30 pm-3:30 pm

1 stop18h 00m

Belfast City

Tue 8/25

8:25 pm-11:35 am

1 stop23h 10m

$929

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 8/17

1:30 pm-6:45 pm

1 stop21h 15m

Belfast City

Tue 8/25

9:40 am-10:26 pm

2 stops20h 46m

$932

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

13h 55m

Direct flights

None
The fastest flight from Seattle to Belfast City Airport takes 13h 55m
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

Frequently asked questions about flying from Seattle to Belfast City Airport

  • 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 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 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.

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