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$404+ Cheap flights from Northern Ireland to Seattle (SEA)

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 2/17. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SEA
Jan 21 — Jan 281
Tue 1/21
Tue 1/28
1 adult, Economy
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Cheap flight deals from Northern Ireland to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Northern Ireland (GBNIR) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 16, 2025.

Round-trip from

$557
(Trip.com)

One-way from

$404
(Kiwi.com)
From Northern Ireland to Seattle/Tacoma Intl
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One-way flight from Northern Ireland to Seattle/Tacoma Intl
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Find flight deals from Northern Ireland to Seattle

Cheapest flights from Northern Ireland to Seattle
Explore the most affordable flight options available from Northern Ireland to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 16, 2025.

This Trip.com deal was found by Cheapflights users on 1/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/66:30 amBFS - SEA
2 stops18h 30mMultiple Airlines
Tue 2/112:35 pmSEA - BFS
2 stops19h 20mMultiple Airlines
Deal found 1/16$557
This British Airways deal was found by Cheapflights users on 1/16. 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.
Thu 5/86:35 amBHD - SEA
1 stop13h 00mBritish Airways
Thu 5/221:30 pmSEA - BHD
1 stop15h 45mBritish Airways
Deal found 1/16$676
This Delta deal was found by Cheapflights users on 1/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/86:30 amBHD - SEA
2 stops20h 04mDelta
Thu 5/225:35 pmSEA - BHD
1 stop19h 40mDelta
Deal found 1/16$689
This EaseMyTrip deal was found by Cheapflights users on 1/16. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/81:15 pmBHD - SEA
2 stops41h 43mMultiple Airlines
Thu 5/2911:20 amSEA - BHD
2 stops17h 55mMultiple Airlines
Deal found 1/16$702
This EaseMyTrip deal was found by Cheapflights users on 1/16. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/86:30 amBHD - SEA
1 stop13h 10mVirgin Atlantic
Thu 5/295:35 pmSEA - BHD
1 stop19h 40mVirgin Atlantic
Deal found 1/16$717
This American Airlines deal was found by Cheapflights users on 1/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/84:20 pmBHD - SEA
1 stop27h 15mAmerican Airlines
Thu 5/295:40 pmSEA - BHD
2 stops16h 25mAmerican Airlines
Deal found 1/15$726
This KLM deal was found by Cheapflights users on 1/15. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/95:25 pmBHD - SEA
1 stop30h 30mKLM
Fri 5/301:55 pmSEA - BHD
1 stop19h 00mKLM
Deal found 1/15$758

Find flights from Northern Ireland to Seattle within your budget

Customize your flight search to find flights from Northern Ireland to Seattle 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 January 16, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 2/6

6:30 am-5:00 pm

2 stops18h 30m

Seattle/Tacoma Intl

Tue 2/11

2:35 pm-5:55 pm

2 stops19h 20m

$557

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/8

6:35 am-11:35 am

1 stop13h 00m

Seattle/Tacoma Intl

Thu 5/22

1:30 pm-1:15 pm

1 stop15h 45m

$676

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/8

6:30 am-6:34 pm

2 stops20h 04m

Seattle/Tacoma Intl

Thu 5/22

5:35 pm-9:15 pm

1 stop19h 40m

$689

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/8

1:15 pm-10:58 pm

2 stops41h 43m

Seattle/Tacoma Intl

Thu 5/29

11:20 am-1:15 pm

2 stops17h 55m

$702

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/8

6:30 am-11:40 am

1 stop13h 10m

Seattle/Tacoma Intl

Thu 5/29

5:35 pm-9:15 pm

1 stop19h 40m

$717

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/8

4:20 pm-11:35 am

1 stop27h 15m

Seattle/Tacoma Intl

Thu 5/29

5:40 pm-6:05 pm

2 stops16h 25m

$726

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Fri 5/9

5:25 pm-3:55 pm

1 stop30h 30m

Seattle/Tacoma Intl

Fri 5/30

1:55 pm-4:55 pm

1 stop19h 00m

$758

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 2/17

10:50 am-12:25 am

2 stops45h 35m

$404

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 2/17

6:35 am-6:15 pm

2 stops19h 40m

$543

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 2/17

6:55 am-6:15 pm

2 stops19h 20m

$549

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

Showing 1-10 of 11 results
1
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Best time to book a flight from Northern Ireland to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Northern Ireland 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.

Travel insights for flights from Northern Ireland to Seattle

Get recent, data-driven insights about flights from Northern Ireland to Seattle including ideal travel times, pricing trends, and more.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated January 16, 2025.
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,511 reviews
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,339 reviews
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic
7.5
Good
664 reviews
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Aer Lingus
7.1
Good
1,077 reviews
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Northern Ireland to Seattle. 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 into for flights to Seattle from Northern Ireland?

    If you book a flight to Seattle from Northern Ireland, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Northern Ireland to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Northern Ireland to Seattle (average of $238). Flying from Northern Ireland to Seattle in July is currently the most expensive (average of $411). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Northern Ireland?

Book flights to Northern Ireland if you plan to visit one of these locations
SeaTac
Tukwila
Renton
Tacoma
Lacey
Federal Way
Ocean Shores
Leavenworth
Olympia
Marysville
Centralia
Cle Elum
Mukilteo
Aberdeen
Lakewood
Issaquah
Shoreline
Lynnwood
Shelton
Silverdale

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Alternative routes for Northern Ireland to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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