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.

£238 Cheap Flights from Seattle to Northern Ireland in 2026

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Find the cheapest flights from Seattle to Northern Ireland

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

13:30 - 12:55

SEA

BHD

15h 25m

1 stop

20:35 - 11:35

BHD

SEA

23h 00m

1 stop

£659British Airways

Mon, 5 Oct - Thu, 22 Oct

20:20 - 18:45

SEA

BHD

14h 25m

1 stop

20:35 - 11:35

BHD

SEA

23h 00m

1 stop

£660British Airways

Mon, 5 Oct - Thu, 22 Oct

13:30 - 10:30

SEA

BHD

13h 00m

1 stop

16:35 - 11:35

BHD

SEA

27h 00m

1 stop

£673British Airways

Sun, 27 Sep - Thu, 1 Oct

20:20 - 18:45

SEA

BHD

14h 25m

1 stop

20:35 - 11:35

BHD

SEA

23h 00m

1 stop

£674British Airways

Sun, 27 Sep - Thu, 1 Oct

15:10 - 15:30

SEA

BHD

16h 20m

2 stops

06:30 - 11:35

BHD

SEA

13h 05m

1 stop

£676Multiple Airlines

Mon, 5 Oct - Thu, 22 Oct

15:10 - 15:30

SEA

BHD

16h 20m

2 stops

06:30 - 11:35

BHD

SEA

13h 05m

1 stop

£677Multiple Airlines

Mon, 5 Oct - Thu, 22 Oct

15:10 - 15:30

SEA

BHD

16h 20m

2 stops

12:45 - 00:14

BHD

SEA

19h 29m

2 stops

£683Multiple Airlines

Mon, 5 Oct - Thu, 22 Oct

15:10 - 15:30

SEA

BHD

16h 20m

2 stops

12:45 - 00:14

BHD

SEA

19h 29m

2 stops

£684Multiple Airlines

Mon, 5 Oct - Thu, 22 Oct

15:10 - 15:30

SEA

BHD

16h 20m

2 stops

12:45 - 00:14

BHD

SEA

19h 29m

2 stops

£685Multiple Airlines

Mon, 5 Oct - Thu, 22 Oct

15:40 - 21:40

SEA

BFS

22h 00m

3 stops

06:30 - 18:45

BFS

SEA

44h 15m

3 stops

£691Multiple Airlines

Thu, 28 May - Mon, 1 Jun

British Airways flights from Seattle to Northern Ireland

Our best British Airways deals on Seattle to Northern Ireland flight tickets

British Airways

5 Oct

SEA13:30Seattle/Tacoma Intl

15h 25m

1 stop

BHD12:55Belfast City

22 Oct

BHD20:35Belfast City

23h 00m

1 stop

SEA11:35Seattle/Tacoma Intl

£659

British Airways

5 Oct

SEA20:20Seattle/Tacoma Intl

14h 25m

1 stop

BHD18:45Belfast City

22 Oct

BHD20:35Belfast City

23h 00m

1 stop

SEA11:35Seattle/Tacoma Intl

£660

British Airways

27 Sept

SEA13:30Seattle/Tacoma Intl

13h 00m

1 stop

BHD10:30Belfast City

1 Oct

BHD16:35Belfast City

27h 00m

1 stop

SEA11:35Seattle/Tacoma Intl

£673

KLM flights from Seattle to Northern Ireland

Our best KLM deals on Seattle to Northern Ireland flight tickets

KLM

9 Jun

SEA07:15Seattle/Tacoma Intl

18h 05m

2 stops

BHD09:20Belfast City

16 Jun

BHD09:50Belfast City

21h 18m

2 stops

SEA23:08Seattle/Tacoma Intl

£836

KLM

23 Jul

SEA17:40Seattle/Tacoma Intl

31h 40m

1 stop

BHD09:20Belfast City

28 Jul

BHD09:50Belfast City

21h 18m

2 stops

SEA23:08Seattle/Tacoma Intl

£837

KLM

3 Jul

SEA07:15Seattle/Tacoma Intl

18h 05m

2 stops

BHD09:20Belfast City

10 Aug

BHD17:30Belfast City

30h 57m

1 stop

SEA16:27Seattle/Tacoma Intl

£908

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 5/10

13:30-12:55

1 stop15h 25m

Belfast City

Thu 22/10

20:35-11:35

1 stop23h 00m

£659

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 5/10

20:20-18:45

1 stop14h 25m

Belfast City

Thu 22/10

20:35-11:35

1 stop23h 00m

£660

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 27/9

13:30-10:30

1 stop13h 00m

Belfast City

Thu 1/10

16:35-11:35

1 stop27h 00m

£673

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 27/9

20:20-18:45

1 stop14h 25m

Belfast City

Thu 1/10

20:35-11:35

1 stop23h 00m

£674

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

£676

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

12:45-00:14

2 stops19h 29m

£683

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 5/10

15:10-15:30

2 stops16h 20m

Belfast City

Thu 22/10

12:45-00:14

2 stops19h 29m

£684

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 5/10

15:10-15:30

2 stops16h 20m

Belfast City

Thu 22/10

12:45-00:14

2 stops19h 29m

£685

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 28/5

15:40-21:40

3 stops22h 00m

Belfast Intl

Mon 1/6

06:30-18:45

3 stops44h 15m

£691

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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 and American Airlines are the most popular carriers 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	13h 00m
Direct flights	None

The fastest flight from Seattle to Northern Ireland takes 13h 00m

There are no direct flights from Seattle to Northern Ireland. There are no popular flight routes from Seattle to Northern Ireland.

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Frequently asked questions about flying from Seattle to Northern Ireland

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.