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Cheap flights from Northern Ireland to Seattle from £444

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 17/2. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SEA
22 Jan — 29 Jan1
1 adult

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 17 January 2025.

Round-trip from

£455

One-way from

£444
6/2-11/2
  • 6/2-11/2
  • 4 total stops
  • 37h 50m total
  • Northern Ireland to Seattle
Aer Lingus
  • Aer Lingus
  • 17/2
  • 2 total stops
  • 19h 40m total
  • Northern Ireland to Seattle

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 17 January 2025.

Thu 6/206:30BFS - SEA
2 stops18h 30mMultiple Airlines
Tue 11/214:35SEA - BFS
2 stops19h 20mMultiple Airlines
Deal found 16/1£455
Thu 8/506:35BHD - SEA
1 stop13h 00mBritish Airways
Thu 22/513:30SEA - BHD
1 stop13h 40mBritish Airways
Deal found 17/1£552
Thu 8/506:30BHD - SEA
2 stops20h 04mDelta
Thu 22/517:35SEA - BHD
1 stop19h 40mDelta
Deal found 17/1£564
Thu 8/513:15BHD - SEA
2 stops41h 43mMultiple Airlines
Thu 29/511:20SEA - BHD
2 stops17h 55mMultiple Airlines
Deal found 17/1£574
Thu 8/517:25BHD - SEA
1 stop26h 15mVirgin Atlantic
Thu 29/517:35SEA - BHD
1 stop19h 40mVirgin Atlantic
Deal found 17/1£587
Thu 8/506:35BHD - SEA
2 stops17h 25mAmerican Airlines
Thu 22/517:40SEA - BHD
2 stops16h 25mAmerican Airlines
Deal found 17/1£611
Wed 21/506:30BHD - SEA
1 stop17h 25mKLM
Fri 30/513:55SEA - BHD
1 stop19h 00mKLM
Deal found 16/1£628

Find flights from Northern Ireland to Seattle within your budget

Customise 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 858,174 searches. Data last updated 17 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 6/2

06:30-17:00

2 stops18h 30m

Seattle/Tacoma Intl

Tue 11/2

14:35-17:55

2 stops19h 20m

£455

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

06:35-11:35

1 stop13h 00m

Seattle/Tacoma Intl

Thu 22/5

13:30-11:10

1 stop13h 40m

£552

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

06:30-18:34

2 stops20h 04m

Seattle/Tacoma Intl

Thu 22/5

17:35-21:15

1 stop19h 40m

£564

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

13:15-22:58

2 stops41h 43m

Seattle/Tacoma Intl

Thu 29/5

11:20-13:15

2 stops17h 55m

£574

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

17:25-11:40

1 stop26h 15m

Seattle/Tacoma Intl

Thu 29/5

17:35-21:15

1 stop19h 40m

£587

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

06:35-16:00

2 stops17h 25m

Seattle/Tacoma Intl

Thu 22/5

17:40-18:05

2 stops16h 25m

£611

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 21/5

06:30-15:55

1 stop17h 25m

Seattle/Tacoma Intl

Fri 30/5

13:55-16:55

1 stop19h 00m

£628

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 17/2

06:35-18:15

2 stops19h 40m

£444

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 17/2

06:35-16:55

1 stop18h 20m

£533

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 17/2

19:30-11:20

1 stop23h 50m

£546

Flights are sorted by cheapest return flights first.

Deals found on 16/1

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 return 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.

What is the cheapest time of day to fly from NIR to SEA?

Find hourly flight availability from Northern Ireland to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 January 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Northern Ireland to Seattle as you normally would.

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 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 17 January 2025.
8.0
Very Good
8,513 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.9

Reviews

1 / 10

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

8.0
Very Good
8,513 reviews
8.0
Very Good
8,513 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.9

Reviews

1 / 10

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

7.8
Good
1,339 reviews
8.0
Very Good
8,513 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.9

Reviews

1 / 10

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

7.5
Good
664 reviews
8.0
Very Good
8,513 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.9

Reviews

1 / 10

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

7.2
Good
10,000 reviews
8.0
Very Good
8,513 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.9

Reviews

1 / 10

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

7.1
Good
1,077 reviews
8.0
Very Good
8,513 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.9

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?

    Most people fly into Seattle/Tacoma Intl (SEA) if they book a flight to Seattle from Northern Ireland. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • 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 holiday 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 £622). Flying from Northern Ireland to Seattle in July is currently the most expensive (average of £946). 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

Travelling to a place near Northern Ireland?

Book flights to Northern Ireland if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Northern Ireland to Seattle

Discover the top airline that operate flights from Northern Ireland to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 17 January 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£513Average£639FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Northern Ireland to Seattle?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Northern Ireland to Seattle. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Northern Ireland to Seattle?

Cheapflights helps you find that perfect flight to Seattle from Northern Ireland by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Northern Ireland to Seattle with no change fees?

Yes! Cheapflights helps users easily find flights from Northern Ireland to Seattle with no change fees.

Can Cheapflights notify me if prices for flights from Northern Ireland to Seattle become cheaper?

Yes! Start tracking prices for Northern Ireland to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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