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Cheap flights from Seattle to Northern Ireland from £376

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 21/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
22 Jan — 29 Jan1
1 adult

Cheap flight deals from Seattle to Northern Ireland

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Northern Ireland (GBNIR). 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

£578

One-way from

£376
4/2-11/2
  • 4/2-11/2
  • 4 total stops
  • 49h 59m total
  • Seattle to Northern Ireland
Search Deals
21/5
  • 21/5
  • 2 total stops
  • 42h 35m total
  • Seattle to Northern Ireland
Search Deals

Find flight deals from Seattle to Northern Ireland

Cheapest flights from Seattle to Northern Ireland
Explore the most affordable flight options available from Seattle to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 January 2025.

Tue 4/209:45SEA - BFS
2 stops24h 10mMultiple Airlines
Tue 11/206:30BFS - SEA
2 stops25h 49mMultiple Airlines
Deal found 16/1£578
Tue 4/209:45SEA - BHD
2 stops26h 45mMultiple Airlines
Tue 11/207:25BHD - SEA
2 stops24h 54mMultiple Airlines
Deal found 16/1£588
Tue 4/213:35SEA - BHD
1 stop19h 10mFinnair
Tue 11/209:55BHD - SEA
1 stop15h 00mFinnair
Deal found 16/1£602
Tue 4/213:35SEA - BHD
2 stops19h 10mAmerican Airlines
Tue 11/206:35BHD - SEA
1 stop12h 45mAmerican Airlines
Deal found 16/1£607
Fri 2/513:30SEA - BHD
1 stop15h 15mBritish Airways
Sun 11/506:50BHD - SEA
1 stop19h 30mBritish Airways
Deal found 15/1£682
Fri 17/109:55SEA - BHD
2 stops22h 55mDelta
Fri 24/106:30BHD - SEA
1 stop13h 21mDelta
Deal found 16/1£753
Fri 18/718:45SEA - BHD
2 stops31h 25mAer Lingus
Fri 25/709:50BHD - SEA
2 stops15h 09mAer Lingus
Deal found 16/1£1,245
Fri 20/620:20SEA - BHD
1 stop13h 55mIberia
Sun 13/715:50BHD - SEA
1 stop27h 45mIberia
Deal found 17/1£3,830

Find flights from Seattle to Northern Ireland within your budget

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

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Tue 4/2

09:45-17:55

2 stops24h 10m

Belfast Intl

Tue 11/2

06:30-00:19

2 stops25h 49m

£578

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 4/2

09:45-20:30

2 stops26h 45m

Belfast City

Tue 11/2

07:25-00:19

2 stops24h 54m

£588

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 4/2

13:35-16:45

1 stop19h 10m

Belfast City

Tue 11/2

09:55-16:55

1 stop15h 00m

£602

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 4/2

13:35-16:45

2 stops19h 10m

Belfast City

Tue 11/2

06:35-11:20

1 stop12h 45m

£607

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 2/5

13:30-12:45

1 stop15h 15m

Belfast City

Sun 11/5

06:50-18:20

1 stop19h 30m

£682

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 20/6

20:20-18:15

1 stop13h 55m

Belfast City

Sun 13/7

15:50-11:35

1 stop27h 45m

£3,830

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 21/5

06:00-08:35

2 stops42h 35m

£376

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 21/5

16:20-15:30

2 stops39h 10m

£394

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 20/5

20:20-19:25

1 stop15h 05m

£452

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 19/5

00:40-16:55

2 stops32h 15m

£569

Flights are sorted by cheapest return flights first.

Deals found on 16/1

Showing 1-10 of 11 results
1
2

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 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 Seattle to Northern Ireland

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

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Northern Ireland (average of £67). Flying from Seattle to Northern Ireland in July is currently the most expensive (average of £90). 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.

Rainfall in Northern Ireland by month

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

In terms of precipitation, rainfall in Northern Ireland ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Northern Ireland when rainfall is around 50.0 mm.

Temperature in Northern Ireland by month

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

If weather is an important factor for your trip to Northern Ireland, 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 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Northern Ireland

Get insights into the airlines that provide service to Northern Ireland. 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 Northern Ireland. Reviews last updated 17 January 2025.
Delta
8.0
Very Good
8,513 reviews
Check prices

Food

7.3

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very Good
8,513 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Food

7.3

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair
7.6
Good
1,285 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Food

7.3

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Food

7.3

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Aer Lingus
7.1
Good
1,077 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Food

7.3

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Iberia
7.0
Good
2,641 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Food

7.3

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl (SEA) is the airport most travelers will use when flying to Northern Ireland from Seattle.

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

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at £452. Delta flights start at £569 while deals on Aer Lingus start at £587 one-way.

  • 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 holiday 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.

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

    Currently, January is the cheapest month in which you can book a flight from Seattle to Northern Ireland (average of £67). Flying from Seattle to Northern Ireland in July is currently the most expensive (average of £90). 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

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Alternative routes for Seattle to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.
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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 Seattle to Northern Ireland?

Deals for Seattle to Northern Ireland flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights simply makes it quick and affordable to book flights from Seattle to Northern Ireland by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

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

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

Not ready to book yet? You can track prices for flights from Seattle to Northern Ireland on Cheapflights with our Price Alert feature and get notified when better prices are available.

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