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$333+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SEA
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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Cheap flight deals from Northern Ireland to Seattle

Keep the following information in mind while searching for Northern Ireland to Seattle flight deals. Data was last updated February 20, 2025.

Round-trip from

$793
(EaseMyTrip)

One-way from

$333
(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 February 20, 2025.

This Expedia deal was found by Cheapflights users on 2/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:40 amBHD - SEA
1 stop12h 55mMultiple Airlines
Sun 9/213:05 pmSEA - BHD
2 stops18h 40mMultiple Airlines
Deal found 2/20$775
This EaseMyTrip deal was found by Cheapflights users on 2/20. 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 5/85:25 pmBHD - SEA
1 stop26h 15mVirgin Atlantic
Thu 5/222:10 pmSEA - BHD
1 stop23h 05mVirgin Atlantic
Deal found 2/20$793
This EaseMyTrip deal was found by Cheapflights users on 2/20. 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 5/84:20 pmBHD - SEA
1 stop34h 00mIberia
Thu 5/222:25 pmSEA - BHD
2 stops17h 05mIberia
Deal found 2/20$795
This Delta deal was found by Cheapflights users on 2/20. 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
1 stop17h 20mDelta
Thu 5/226:10 pmSEA - BHD
1 stop14h 45mDelta
Deal found 2/20$800
This TravelUp deal was found by Cheapflights users on 2/20. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:30 amBHD - SEA
1 stop13h 15mKLM
Sun 9/211:55 pmSEA - BHD
1 stop23h 20mKLM
Deal found 2/20$807
This Mytrip deal was found by Cheapflights users on 2/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/62:55 pmBFS - SEA
2 stops41h 04mMultiple Airlines
Sun 4/133:45 pmSEA - BFS
2 stops22h 35mMultiple Airlines
Deal found 2/20$900
This ChecknFly deal was found by Cheapflights users on 2/20. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/87:25 pmBHD - SEA
2 stops29h 34mAer Lingus
Thu 5/226:45 pmSEA - BHD
2 stops30h 30mAer Lingus
Deal found 2/20$948
This Gotogate deal was found by Cheapflights users on 2/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/157:30 pmBHD - SEA
1 stop30h 50mBritish Airways
Sun 9/218:20 pmSEA - BHD
1 stop13h 25mBritish Airways
Deal found 2/20$1,758

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 February 20, 2025.

Fly from

Northern Ireland

Fly to

Seattle

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/8

5:25 pm-11:40 am

1 stop26h 15m

Seattle/Tacoma Intl

Thu 5/22

2:10 pm-9:15 pm

1 stop23h 05m

$793

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/8

4:20 pm-6:20 pm

1 stop34h 00m

Seattle/Tacoma Intl

Thu 5/22

2:25 pm-3:30 pm

2 stops17h 05m

$795

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/8

6:30 am-3:50 pm

1 stop17h 20m

Seattle/Tacoma Intl

Thu 5/22

6:10 pm-4:55 pm

1 stop14h 45m

$800

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/8

6:30 am-3:50 pm

1 stop17h 20m

Seattle/Tacoma Intl

Thu 5/29

2:10 pm-4:55 pm

1 stop18h 45m

$835

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Fri 5/9

6:30 am-11:40 am

1 stop13h 10m

Seattle/Tacoma Intl

Fri 5/30

6:10 pm-9:15 pm

1 stop19h 05m

$873

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 4/6

2:55 pm-11:59 pm

2 stops41h 04m

Seattle/Tacoma Intl

Sun 4/13

3:45 pm-10:20 pm

2 stops22h 35m

$900

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/8

7:25 pm-4:59 pm

2 stops29h 34m

Seattle/Tacoma Intl

Thu 5/22

6:45 pm-9:15 am

2 stops30h 30m

$948

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 3/4

4:20 pm-9:59 pm

3 stops37h 39m

$333

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 3/17

9:05 pm-8:43 am

2 stops42h 38m

$398

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/17

7:30 pm-12:20 pm

1 stop23h 50m

$1,051

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 12 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 February 20, 2025.
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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

Delta
8.0
Very good
8,219 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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

KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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

Virgin Atlantic
7.5
Good
654 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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

Aer Lingus
7.0
Good
1,070 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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

Iberia
7.0
Good
2,639 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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.

  • What are the cheapest airlines to fly from Northern Ireland to Seattle one-way?

    The cheapest airlines for a one-way flight from Northern Ireland to Seattle are Aer Lingus ($1,051), Iberia ($1,093), and Delta ($1,581).

  • 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
Ocean Shores
Leavenworth
Olympia
Federal Way
Centralia
Marysville
Cle Elum
Mukilteo
Aberdeen
Lakewood
Issaquah
Shoreline
Lynnwood
Shelton
Silverdale

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Alternative routes for Northern Ireland to Seattle

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