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Cheap flights from Seattle to Northern Ireland from £232

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 Northern Ireland departing on 23/3. 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
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Find the cheapest flights from Seattle to Northern Ireland

Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
13:35 - 11:10
SEA
-
BHD
13h 35m1 stop
British Airways Logo
12:25 - 17:55
BHD
-
SEA
12h 30m1 stop
£449British Airways
Sat, 7 Mar - Wed, 18 Mar
British Airways Logo
18:50 - 19:40
SEA
-
BHD
16h 50m1 stop
British Airways Logo
10:00 - 17:55
BHD
-
SEA
14h 55m1 stop
£452British Airways
Sat, 7 Mar - Tue, 17 Mar
Multiple Airlines Logo
14:35 - 22:00
SEA
-
BFS
23h 25m2 stops
Multiple Airlines Logo
08:05 - 17:00
BFS
-
SEA
16h 55m2 stops
£452Multiple Airlines
Fri, 30 Jan - Fri, 6 Feb
British Airways Logo
07:15 - 14:15
SEA
-
BHD
23h 00m2 stops
British Airways Logo
19:25 - 17:55
BHD
-
SEA
29h 30m1 stop
£464British Airways
Sat, 7 Mar - Tue, 17 Mar
British Airways Logo
13:35 - 11:10
SEA
-
BHD
13h 35m1 stop
British Airways Logo
12:25 - 17:55
BHD
-
SEA
12h 30m1 stop
£466British Airways
Sat, 7 Mar - Wed, 18 Mar
British Airways Logo
13:35 - 10:30
SEA
-
BHD
12h 55m1 stop
British Airways Logo
11:25 - 16:55
BHD
-
SEA
13h 30m1 stop
£467British Airways
Fri, 30 Jan - Tue, 3 Feb
Multiple Airlines Logo
14:35 - 16:10
SEA
-
BFS
17h 35m2 stops
Multiple Airlines Logo
07:55 - 17:00
BFS
-
SEA
17h 05m2 stops
£499Multiple Airlines
Wed, 28 Jan - Wed, 4 Feb
Multiple Airlines Logo
14:35 - 22:20
SEA
-
BFS
23h 45m2 stops
Multiple Airlines Logo
06:30 - 17:00
BFS
-
SEA
18h 30m2 stops
£508Multiple Airlines
Thu, 29 Jan - Thu, 5 Feb
British Airways Logo
20:20 - 17:45
SEA
-
BHD
13h 25m1 stop
British Airways Logo
06:50 - 11:35
BHD
-
SEA
12h 45m1 stop
£594British Airways
Sun, 26 Apr - Sun, 10 May
British Airways Logo
17:45 - 19:15
SEA
-
BHD
17h 30m2 stops
British Airways Logo
06:35 - 11:30
BHD
-
SEA
12h 55m1 stop
£617British Airways
Fri, 30 Jan - Tue, 3 Feb

British Airways flights from Seattle to Northern Ireland

Our best British Airways deals on Seattle to Northern Ireland flight tickets
British Airways
7 Mar
SEA13:35Seattle/Tacoma Intl
13h 35m
1 stop
BHD11:10Belfast City
18 Mar
BHD12:25Belfast City
12h 30m
1 stop
SEA17:55Seattle/Tacoma Intl
£449
Find similar
British Airways
7 Mar
SEA18:50Seattle/Tacoma Intl
16h 50m
1 stop
BHD19:40Belfast City
17 Mar
BHD10:00Belfast City
14h 55m
1 stop
SEA17:55Seattle/Tacoma Intl
£452
Find similar
British Airways
7 Mar
SEA07:15Seattle/Tacoma Intl
23h 00m
2 stops
BHD14:15Belfast City
17 Mar
BHD19:25Belfast City
29h 30m
1 stop
SEA17:55Seattle/Tacoma Intl
£464
Find similar

Aer Lingus flights from Seattle to Northern Ireland

Our best Aer Lingus deals on Seattle to Northern Ireland flight tickets
Aer Lingus
18 Feb
SEA20:05Seattle/Tacoma Intl
16h 10m
2 stops
BHD20:15Belfast City
23 Feb
BHD06:55Belfast City
19h 25m
2 stops
SEA18:20Seattle/Tacoma Intl
£2,762
Find similar
Aer Lingus
18 Feb
SEA18:50Seattle/Tacoma Intl
16h 20m
1 stop
BHD19:10Belfast City
23 Feb
BHD06:55Belfast City
19h 25m
2 stops
SEA18:20Seattle/Tacoma Intl
£2,775
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Seattle to Northern Ireland 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 December 2025.
Use the filters below to find and compare flights from Seattle to Northern Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

13:35-11:10

1 stop13h 35m

Belfast City

Wed 18/3

12:25-17:55

1 stop12h 30m

£449

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

18:50-19:40

1 stop16h 50m

Belfast City

Tue 17/3

10:00-17:55

1 stop14h 55m

£452

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Fri 30/1

14:35-22:00

2 stops23h 25m

Belfast Intl

Fri 6/2

08:05-17:00

2 stops16h 55m

£452

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

07:15-14:15

2 stops23h 00m

Belfast City

Tue 17/3

19:25-17:55

1 stop29h 30m

£464

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

13:35-11:10

1 stop13h 35m

Belfast City

Wed 18/3

12:25-17:55

1 stop12h 30m

£466

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 30/1

13:35-10:30

1 stop12h 55m

Belfast City

Tue 3/2

11:25-16:55

1 stop13h 30m

£467

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 28/1

14:35-16:10

2 stops17h 35m

Belfast Intl

Wed 4/2

07:55-17:00

2 stops17h 05m

£499

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 29/1

14:35-22:20

2 stops23h 45m

Belfast Intl

Thu 5/2

06:30-17:00

2 stops18h 30m

£508

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 26/4

20:20-17:45

1 stop13h 25m

Belfast City

Sun 10/5

06:50-11:35

1 stop12h 45m

£594

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 30/1

17:45-19:15

2 stops17h 30m

Belfast City

Tue 3/2

06:35-11:30

1 stop12h 55m

£617

Flights are sorted by cheapest return flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Northern Ireland from

How to get the cheapest flight ticket from Seattle to Northern Ireland

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 Northern Ireland?

British Airways is the most popular carrier operating from Seattle/Tacoma Intl to Northern Ireland

Cheap Seattle to Northern Ireland flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Northern Ireland

Fastest flight time

12h 55m

Direct flights

None
The fastest flight from Seattle to Northern Ireland takes 12h 55m
There are no direct flights from Seattle to Northern Ireland. There are no popular flight routes from Seattle to Northern Ireland.
Search flight deals

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Northern Ireland?

    Prices for flights from Seattle/Tacoma Intl Airport to Northern Ireland were last updated today.

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Northern Ireland?

    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 Northern Ireland.

  • What documentation or ID do you need to fly to Northern Ireland?

    The travel and health documents required for your trip to Northern Ireland 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 Northern Ireland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Northern Ireland?

It is quick and easy to find Seattle to Northern Ireland 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 Northern Ireland that suits you.

Can I find flights from Seattle to Northern Ireland with flexible booking policies on momondo?

Yes. All flights to Northern Ireland from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seattle to Northern Ireland?

Once all potential Seattle to Northern Ireland flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for Seattle to Northern Ireland flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Northern Ireland trip

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Find better results for your trip to Northern Ireland

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