Latest deals
Insights
FAQs
Price Alerts

Cheap flights from Seattle to Northern Ireland from £252

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 25/3. 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
Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Seattle to Northern Ireland

Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
18:50 - 16:45
SEA
-
BHD
13h 55m
1 stop
British Airways Logo
06:35 - 17:55
BHD
-
SEA
18h 20m
1 stop
£453British Airways
Sat, 7 Mar - Wed, 18 Mar
British Airways Logo
18:50 - 19:40
SEA
-
BHD
16h 50m
1 stop
British Airways Logo
08:45 - 17:55
BHD
-
SEA
16h 10m
1 stop
£454British Airways
Sat, 7 Mar - Tue, 17 Mar
British Airways Logo
13:35 - 14:15
SEA
-
BHD
16h 40m
1 stop
British Airways Logo
11:25 - 00:24
BHD
-
SEA
19h 59m
2 stops
£456British Airways
Sat, 7 Mar - Tue, 17 Mar
British Airways Logo
13:29 - 18:45
SEA
-
BHD
21h 16m
2 stops
British Airways Logo
06:30 - 11:35
BHD
-
SEA
13h 05m
1 stop
£472British Airways
Sun, 3 May - Tue, 12 May
British Airways Logo
13:29 - 18:45
SEA
-
BHD
21h 16m
2 stops
British Airways Logo
06:30 - 22:26
BHD
-
SEA
23h 56m
2 stops
£474British Airways
Sun, 3 May - Tue, 12 May
Multiple Airlines Logo
17:30 - 16:55
SEA
-
BHD
15h 25m
1 stop
Multiple Airlines Logo
09:50 - 16:30
BHD
-
SEA
14h 40m
1 stop
£484Multiple Airlines
Sun, 3 May - Tue, 12 May
British Airways Logo
18:50 - 07:30
SEA
-
BHD
28h 40m
1 stop
British Airways Logo
17:35 - 16:55
BHD
-
SEA
31h 20m
1 stop
£538British Airways
Wed, 25 Feb - Sun, 1 Mar
British Airways Logo
05:30 - 15:30
SEA
-
BHD
26h 00m
2 stops
British Airways Logo
06:30 - 11:35
BHD
-
SEA
13h 05m
1 stop
£546British Airways
Fri, 3 Apr - Fri, 10 Apr
British Airways Logo
05:30 - 18:10
SEA
-
BHD
28h 40m
2 stops
British Airways Logo
18:30 - 11:35
BHD
-
SEA
25h 05m
1 stop
£562British Airways
Fri, 3 Apr - Mon, 20 Apr
Multiple Airlines Logo
15:00 - 20:25
SEA
-
BFS
22h 25m
2 stops
Multiple Airlines Logo
09:05 - 13:10
BFS
-
SEA
35h 05m
2 stops
£597Multiple Airlines
Thu, 12 Mar - Thu, 19 Mar

British Airways flights from Seattle to Northern Ireland

Our best British Airways deals on Seattle to Northern Ireland flight tickets
British Airways
7 Mar
SEA18:50Seattle/Tacoma Intl
13h 55m
1 stop
BHD16:45Belfast City
18 Mar
BHD06:35Belfast City
18h 20m
1 stop
SEA17:55Seattle/Tacoma Intl
£453
British Airways
7 Mar
SEA18:50Seattle/Tacoma Intl
16h 50m
1 stop
BHD19:40Belfast City
17 Mar
BHD08:45Belfast City
16h 10m
1 stop
SEA17:55Seattle/Tacoma Intl
£454
British Airways
7 Mar
SEA13:35Seattle/Tacoma Intl
16h 40m
1 stop
BHD14:15Belfast City
17 Mar
BHD11:25Belfast City
19h 59m
2 stops
SEA00:24Seattle/Tacoma Intl
£456

Aer Lingus flights from Seattle to Northern Ireland

Our best Aer Lingus deals on Seattle to Northern Ireland flight tickets
Aer Lingus
23 Mar
SEA21:05Seattle/Tacoma Intl
29h 10m
2 stops
BHD09:15Belfast City
27 Mar
BHD10:35Belfast City
15h 45m
2 stops
SEA19:20Seattle/Tacoma Intl
£819
Aer Lingus
15 Jul
SEA20:20Seattle/Tacoma Intl
16h 15m
1 stop
BHD20:35Belfast City
18 Jul
BHD18:00Belfast City
31h 10m
2 stops
SEA17:10Seattle/Tacoma Intl
£5,061
Aer Lingus
15 Jul
SEA18:55Seattle/Tacoma Intl
14h 50m
2 stops
BHD17:45Belfast City
18 Jul
BHD18:00Belfast City
31h 10m
2 stops
SEA17:10Seattle/Tacoma Intl
£5,077

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 28 January 2026.
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

18:50-16:45

1 stop13h 55m

Belfast City

Wed 18/3

06:35-17:55

1 stop18h 20m

£453

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

18:50-19:40

1 stop16h 50m

Belfast City

Tue 17/3

08:45-17:55

1 stop16h 10m

£454

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

13:35-14:15

1 stop16h 40m

Belfast City

Tue 17/3

11:25-00:24

2 stops19h 59m

£456

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 3/5

13:29-18:45

2 stops21h 16m

Belfast City

Tue 12/5

06:30-11:35

1 stop13h 05m

£472

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 3/5

13:29-18:45

2 stops21h 16m

Belfast City

Tue 12/5

06:30-22:26

2 stops23h 56m

£474

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 3/5

17:30-16:55

1 stop15h 25m

Belfast City

Tue 12/5

09:50-16:30

1 stop14h 40m

£484

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 25/2

18:50-07:30

1 stop28h 40m

Belfast City

Sun 1/3

17:35-16:55

1 stop31h 20m

£538

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 3/4

05:30-15:30

2 stops26h 00m

Belfast City

Fri 10/4

06:30-11:35

1 stop13h 05m

£546

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 3/4

05:30-18:10

2 stops28h 40m

Belfast City

Mon 20/4

18:30-11:35

1 stop25h 05m

£562

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 12/3

15:00-20:25

2 stops22h 25m

Belfast Intl

Thu 19/3

09:05-13:10

2 stops35h 05m

£597

Flights are sorted by cheapest return flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

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 35m

Direct flights

None
The fastest flight from Seattle to Northern Ireland takes 12h 35m
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

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 27/2
Fri 6/3
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Northern Ireland

Popular Cities in Northern Ireland

Popular flights according to clicks in the last 7 days on momondo
Flights to Londonfrom £28
Flights to Manchesterfrom £32
Flights to Birminghamfrom £33
Flights to Edinburghfrom £31
Flights to Belfastfrom £28
Flights to Glasgowfrom £31
Flights to Bristolfrom £30
Flights to Newcastle upon Tynefrom £29
Flights to Liverpoolfrom £30
Flights to Aberdeenfrom £36
Flights to Leedsfrom £36
Flights to Invernessfrom £36