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Cheap flights from Seattle to Belfast from £332

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 28/6. 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 return flights

Enter your travel dates to find the best prices.
British Airways Logo
20:20 - 20:35
SEA
-
BHD
16h 15m
1 stop
British Airways Logo
20:35 - 11:35
BHD
-
SEA
23h 00m
1 stop
£661British Airways
Mon, 5 Oct - Thu, 22 Oct
British Airways Logo
20:20 - 18:45
SEA
-
BHD
14h 25m
1 stop
British Airways Logo
19:30 - 11:35
BHD
-
SEA
24h 05m
1 stop
£675British Airways
Sun, 20 Sep - Thu, 24 Sep
American Airlines Logo
15:10 - 15:30
SEA
-
BHD
16h 20m
2 stops
American Airlines Logo
06:30 - 11:35
BHD
-
SEA
13h 05m
1 stop
£677American Airlines
Mon, 5 Oct - Thu, 22 Oct
American Airlines Logo
15:10 - 15:30
SEA
-
BHD
16h 20m
2 stops
American Airlines Logo
06:30 - 11:35
BHD
-
SEA
13h 05m
1 stop
£677American Airlines
Mon, 5 Oct - Thu, 22 Oct
British Airways Logo
11:34 - 15:30
SEA
-
BHD
19h 56m
2 stops
British Airways Logo
12:45 - 00:14
BHD
-
SEA
19h 29m
2 stops
£686British Airways
Mon, 5 Oct - Thu, 22 Oct
British Airways Logo
11:34 - 15:30
SEA
-
BHD
19h 56m
2 stops
British Airways Logo
12:45 - 00:14
BHD
-
SEA
19h 29m
2 stops
£686British Airways
Mon, 5 Oct - Thu, 22 Oct
British Airways Logo
20:20 - 18:10
SEA
-
BHD
13h 50m
1 stop
British Airways Logo
20:35 - 11:35
BHD
-
SEA
23h 00m
1 stop
£696British Airways
Fri, 25 Sep - Thu, 8 Oct
Multiple Airlines Logo
13:38 - 15:30
SEA
-
BHD
17h 52m
2 stops
Multiple Airlines Logo
19:30 - 11:35
BHD
-
SEA
24h 05m
1 stop
£715Multiple Airlines
Fri, 25 Sep - Thu, 8 Oct
KLM Logo
13:30 - 16:55
SEA
-
BHD
19h 25m
2 stops
KLM Logo
09:50 - 22:04
BHD
-
SEA
20h 14m
2 stops
£737KLM
Fri, 25 Sep - Thu, 8 Oct
Delta Logo
07:20 - 09:20
SEA
-
BHD
18h 00m
2 stops
Delta Logo
09:50 - 16:27
BHD
-
SEA
14h 37m
1 stop
£798Delta
Tue, 28 Jul - Tue, 4 Aug

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Delta flights from Seattle to Belfast City Airport

Our best Delta deals on Seattle to Belfast City Airport flight tickets
Delta
28 Jul
SEA07:20Seattle/Tacoma Intl
18h 00m
2 stops
BHD09:20Belfast City
4 Aug
BHD09:50Belfast City
14h 37m
1 stop
SEA16:27Seattle/Tacoma Intl
£798
Delta
18 Jun
SEA13:55Seattle/Tacoma Intl
19h 00m
1 stop
BHD16:55Belfast City
23 Jun
BHD09:50Belfast City
14h 34m
1 stop
SEA16:24Seattle/Tacoma Intl
£1,048
Delta
18 Jun
SEA07:20Seattle/Tacoma Intl
18h 00m
2 stops
BHD09:20Belfast City
23 Jun
BHD09:50Belfast City
14h 34m
1 stop
SEA16:24Seattle/Tacoma Intl
£1,051

Aer Lingus flights from Seattle to Belfast City Airport

Our best Aer Lingus deals on Seattle to Belfast City Airport flight tickets
Aer Lingus
2 Aug
SEA19:10Seattle/Tacoma Intl
17h 40m
2 stops
BHD20:50Belfast City
6 Aug
BHD09:50Belfast City
15h 20m
2 stops
SEA17:10Seattle/Tacoma Intl
£894
Aer Lingus
2 Aug
SEA19:10Seattle/Tacoma Intl
30h 40m
2 stops
BHD09:50Belfast City
6 Aug
BHD06:50Belfast City
18h 20m
2 stops
SEA17:10Seattle/Tacoma Intl
£927
Aer Lingus
2 Aug
SEA19:10Seattle/Tacoma Intl
17h 40m
2 stops
BHD20:50Belfast City
6 Aug
BHD20:35Belfast City
23h 00m
1 stop
SEA11:35Seattle/Tacoma Intl
£1,085

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 16 June 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 return flight

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 5/10

20:20-20:35

1 stop16h 15m

Belfast City

Thu 22/10

20:35-11:35

1 stop23h 00m

£661

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 20/9

20:20-18:45

1 stop14h 25m

Belfast City

Thu 24/9

19:30-11:35

1 stop24h 05m

£675
Fastest return journey

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 5/10

15:10-15:30

2 stops16h 20m

Belfast City

Thu 22/10

06:30-11:35

1 stop13h 05m

£677

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 5/10

15:10-15:30

2 stops16h 20m

Belfast City

Thu 22/10

06:30-11:35

1 stop13h 05m

£677

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 5/10

11:34-15:30

2 stops19h 56m

Belfast City

Thu 22/10

12:45-00:14

2 stops19h 29m

£686

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 5/10

11:34-15:30

2 stops19h 56m

Belfast City

Thu 22/10

12:45-00:14

2 stops19h 29m

£686

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 25/9

20:20-18:10

1 stop13h 50m

Belfast City

Thu 8/10

20:35-11:35

1 stop23h 00m

£696

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 25/9

13:38-15:30

2 stops17h 52m

Belfast City

Thu 8/10

19:30-11:35

1 stop24h 05m

£715

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 25/9

13:30-16:55

2 stops19h 25m

Belfast City

Thu 8/10

09:50-22:04

2 stops20h 14m

£737

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 28/7

07:20-09:20

2 stops18h 00m

Belfast City

Tue 4/8

09:50-16:27

1 stop14h 37m

£798

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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?

Delta and KLM are the most popular carriers 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 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

Fastest flight time

13h 15m

Direct flights

None
The fastest flight from Seattle to Belfast City Airport takes 13h 15m
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?

    A flight from Seattle/Tacoma Intl to Belfast City will travel around 4463.4 mi. By plane, this route typically takes 13h 15m.

  • 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.

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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