£304+ Flights from Northern Ireland to Seattle | Cheapflights

Cheap flight deals from Northern Ireland to Seattle

Round-trip from	£628
One-way from	£304

Virgin Atlantic

Virgin Atlantic
8/5-22/5
2 total stops
36h 15m total
Northern Ireland to Seattle

17/3

17/3
3 total stops
43h 42m 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 22 February 2025.

Thu 8/506:30BHD - SEA

1 stop13h 10mVirgin Atlantic

Thu 22/514:10SEA - BHD

1 stop23h 05mVirgin Atlantic

Deal found 21/2£628

Thu 8/516:20BHD - SEA

1 stop34h 00mIberia

Thu 22/514:25SEA - BHD

2 stops17h 05mIberia

Deal found 21/2£630

Thu 8/506:30BHD - SEA

1 stop13h 10mDelta

Thu 22/518:10SEA - BHD

1 stop19h 05mDelta

Deal found 21/2£633

Thu 8/506:35BHD - SEA

2 stops17h 25mAmerican Airlines

Thu 22/513:30SEA - BHD

1 stop15h 45mAmerican Airlines

Deal found 21/2£636

Thu 8/506:30BHD - SEA

1 stop13h 10mMultiple Airlines

Thu 29/514:10SEA - BHD

1 stop18h 45mMultiple Airlines

Deal found 21/2£661

Fri 9/506:30BHD - SEA

1 stop17h 20mKLM

Fri 30/518:10SEA - BHD

1 stop19h 05mKLM

Deal found 21/2£691

Thu 8/519:25BHD - SEA

2 stops29h 34mAer Lingus

Thu 22/518:45SEA - BHD

2 stops30h 05mAer Lingus

Deal found 21/2£719

Mon 7/408:10BFS - SEA

3 stops38h 55mMultiple Airlines

Mon 14/415:45SEA - BFS

2 stops21h 10mMultiple Airlines

Deal found 20/2£776

Best flights from Northern Ireland to Seattle
Discover carefully curated flight deals from Northern Ireland to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 22 February 2025.

Thu 8/506:30BHD - SEA

1 stop13h 10mVirgin Atlantic

Thu 22/514:10SEA - BHD

1 stop23h 05mVirgin Atlantic

Deal found 21/2£628

Thu 8/516:20BHD - SEA

1 stop34h 00mIberia

Thu 22/514:25SEA - BHD

2 stops17h 05mIberia

Deal found 21/2£630

Thu 8/506:30BHD - SEA

1 stop13h 10mDelta

Thu 22/518:10SEA - BHD

1 stop19h 05mDelta

Deal found 21/2£633

Thu 8/506:35BHD - SEA

2 stops17h 25mAmerican Airlines

Thu 22/513:30SEA - BHD

1 stop15h 45mAmerican Airlines

Deal found 21/2£636

Thu 8/506:30BHD - SEA

1 stop13h 10mMultiple Airlines

Thu 29/514:10SEA - BHD

1 stop18h 45mMultiple Airlines

Deal found 21/2£661

Fri 9/506:30BHD - SEA

1 stop17h 20mKLM

Fri 30/518:10SEA - BHD

1 stop19h 05mKLM

Deal found 21/2£691

Thu 8/519:25BHD - SEA

2 stops29h 34mAer Lingus

Thu 22/518:45SEA - BHD

2 stops30h 05mAer Lingus

Deal found 21/2£719

Mon 7/408:10BFS - SEA

3 stops38h 55mMultiple Airlines

Mon 14/415:45SEA - BFS

2 stops21h 10mMultiple Airlines

Deal found 20/2£776

One-way flights from Northern Ireland to Seattle
Search for one-way flight options from Northern Ireland to Seattle. Find affordable one-way fares based on user searches. Data last updated 22 February 2025.

Mon 17/321:10BFS - SEA

3 stops43h 42mMultiple Airlines

Deal found 21/2£304

Wed 19/307:25BHD - SEA

3 stops35h 37mMultiple Airlines

Deal found 21/2£333

Mon 17/317:05BHD - SEA

2 stops57h 10mAer Lingus

Deal found 21/2£483

Find flights from Northern Ireland to Seattle within your budget

Fly from

Fly to

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

06:30-11:40

1 stop13h 10m

Seattle/Tacoma Intl

Thu 22/5

14:10-21:15

1 stop23h 05m

£628

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

16:20-18:20

1 stop34h 00m

Seattle/Tacoma Intl

Thu 22/5

14:25-15:30

2 stops17h 05m

£630

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

06:30-11:40

1 stop13h 10m

Seattle/Tacoma Intl

Thu 22/5

18:10-21:15

1 stop19h 05m

£633

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

06:35-16:00

2 stops17h 25m

Seattle/Tacoma Intl

Thu 22/5

13:30-13:15

1 stop15h 45m

£636

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

06:30-11:40

1 stop13h 10m

Seattle/Tacoma Intl

Thu 29/5

14:10-16:55

1 stop18h 45m

£661

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Fri 9/5

06:30-15:50

1 stop17h 20m

Seattle/Tacoma Intl

Fri 30/5

18:10-21:15

1 stop19h 05m

£691

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

19:25-16:59

2 stops29h 34m

Seattle/Tacoma Intl

Thu 22/5

18:45-08:50

2 stops30h 05m

£719

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 7/4

08:10-15:05

3 stops38h 55m

Seattle/Tacoma Intl

Mon 14/4

15:45-20:55

2 stops21h 10m

£776

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 17/3

21:10-09:52

3 stops43h 42m

£304

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 19/3

07:25-12:02

3 stops35h 37m

£333

Flights are sorted by cheapest return flights first.

Deals found on 21/2

Showing 1-10 of 11 results

1

2

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?

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

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

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

8.0

Very Good

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

8.0

Very Good

8.0

Very Good

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

7.8

Good

8.0

Very Good

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

8.0

Very Good

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

American Airlines

7.2

Good

8.0

Very Good

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

7.0

Good

8.0

Very Good

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

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

Tacoma

Leavenworth

Bothell

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Top airline flying from Northern Ireland to Seattle

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£468	Average£555	FlexibilityNo cancel fee	On-time70%	Search British Airways flights

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