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Northern Ireland

$213+ Cheap flights from Seattle (SEA) to Northern Ireland

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
Jan 28 — Feb 41
Wed 1/28
Wed 2/4
1 adult, Economy
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Cheap flight deals from Seattle to Northern Ireland

Best flights from Seattle to Northern Ireland
Discover carefully curated flight deals from Seattle to Northern Ireland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 29, 2025.

This oojo deal was found by Cheapflights users on 12/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/71:35 pmSEA - BHD
1 stop16h 40mBritish Airways
Tue 3/178:45 amBHD - SEA
1 stop16h 10mBritish Airways
Deal found 12/28$602
This oojo deal was found by Cheapflights users on 12/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/77:15 amSEA - BHD
2 stops23h 00mBritish Airways
Wed 3/1811:25 amBHD - SEA
1 stop13h 30mBritish Airways
Deal found 12/28$622
This British Airways deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/201:35 pmSEA - BHD
1 stop12h 55mBritish Airways
Tue 2/246:35 amBHD - SEA
1 stop12h 55mBritish Airways
Deal found 12/26$627

Find flight deals from Seattle to Northern Ireland

Keep the following information in mind while searching for Seattle to Northern Ireland flight deals. Data was last updated December 29, 2025.

Round-trip from

$602
(oojo)

One-way from

$213
(oojo)

Popular in

December

Cheapest in

April

Average price

$1,583
From Seattle/Tacoma Intl to Northern Ireland
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One-way flight from Seattle/Tacoma Intl to Northern Ireland
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($128 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($59 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize 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, Cheapflights users made 2,558,603 searches. Data last updated December 29, 2025.
Use the filters below to find and compare flights from Seattle to Northern Ireland that are best for you.

Fly from

Seattle

Fly to

Northern Ireland

Route

Depart

Return

Price

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

1:35 pm-2:15 pm

1 stop16h 40m

Belfast City

Tue 3/17

8:45 am-5:55 pm

1 stop16h 10m

$602

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

7:15 am-2:15 pm

2 stops23h 00m

Belfast City

Wed 3/18

11:25 am-5:55 pm

1 stop13h 30m

$622

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 2/20

1:35 pm-10:30 am

1 stop12h 55m

Belfast City

Tue 2/24

6:35 am-11:30 am

1 stop12h 55m

$627

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 5/6

8:20 pm-7:50 pm

1 stop15h 30m

$213

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 5/6

3:14 pm-3:35 pm

2 stops16h 21m

$230

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 5/1

8:20 pm-8:45 pm

1 stop16h 25m

$263

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 5/1

3:21 pm-6:15 pm

2 stops18h 54m

$280

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Fri 5/1

7:00 pm-9:50 pm

2 stops18h 50m

$288

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 5/6

6:45 pm-10:20 pm

2 stops19h 35m

$302

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 2/11

8:30 am-10:30 am

3 stops42h 00m

$348

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 12 results
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Best time to book a flight from Seattle to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Northern Ireland
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Northern Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Northern Ireland?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Northern Ireland.

  • How long is the flight from Seattle to Northern Ireland?

    Airlines like British Airways fly from Seattle to Northern Ireland in about 16h 40m. The time it takes to get you to your destination can typically vary by up to . The distance from Seattle to Northern Ireland is about 4472 mi.

  • Can I find deals for flights from Seattle to Northern Ireland that include hotel bookings?

    Yes. In addition to deals on Seattle to Northern Ireland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Northern Ireland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Northern Ireland.

  • Can I find deals for business class flights from Seattle to Northern Ireland?

    Yes. Cheapflights offers flight deals from Seattle to Northern Ireland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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