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Cheap flights from Seattle to Northern Ireland from £357

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 30/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
20 Nov — 27 Nov1
1 adult

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 943,810 searches. Data last updated 15 November 2024.

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Route

Depart

Return

Price

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 30/1

14:35-17:50

2 stops19h 15m

Belfast Intl

Fri 7/2

06:30-17:00

2 stops18h 30m

£521

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 19/1

18:50-18:40

1 stop15h 50m

Belfast City

Mon 27/1

19:30-16:55

1 stop29h 25m

£540

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 15/1

14:09-16:50

1 stop18h 41m

Belfast City

Fri 24/1

06:30-11:50

1 stop13h 20m

£544

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 30/1

18:50-16:40

1 stop13h 50m

Belfast City

Fri 7/2

06:45-16:55

1 stop18h 10m

£549

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 24/4

13:32-13:30

2 stops15h 58m

Belfast City

Thu 15/5

16:20-11:35

1 stop27h 15m

£640

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 19/12

14:13-21:00

1 stop22h 47m

Belfast City

Mon 6/1

17:20-11:50

1 stop26h 30m

£1,725

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Mon 30/12

21:36-21:50

3 stops40h 14m

£357

Flights are sorted by cheapest first

Deals found on 14/11

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 15 November 2024.

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 15 November 2024.

Sat 14/1219:59SEA - BHD
2 stops36h 51mBritish Airways
Sat 21/1217:20BHD - SEA
2 stops32h 55mBritish Airways
Deal found 14/11£968
Sat 14/1221:21SEA - BFS
2 stops39h 14mMultiple Airlines
Sat 21/1209:55BFS - SEA
1 stop34h 20mMultiple Airlines
Deal found 14/11£985
Thu 19/1215:00SEA - BHD
2 stops17h 40mAmerican Airlines
Wed 8/106:35BHD - SEA
2 stops20h 35mAmerican Airlines
Deal found 13/11£1,341
Thu 19/1214:13SEA - BHD
1 stop18h 37mDelta
Tue 7/117:20BHD - SEA
2 stops31h 20mDelta
Deal found 13/11£1,370
Sat 14/1214:13SEA - BHD
1 stop18h 37mMultiple Airlines
Sat 21/1206:30BHD - SEA
1 stop13h 22mMultiple Airlines
Deal found 14/11£1,375
Thu 19/1214:13SEA - BHD
1 stop22h 47mKLM
Mon 6/117:20BHD - SEA
1 stop26h 30mKLM
Deal found 13/11£1,725

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 August 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 15 November 2024.
Delta
8.0
Very Good
8,786 reviews
Check prices

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

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
8,786 reviews
Delta
8.0
Very Good
8,786 reviews
Check prices

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 10

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

KLM
7.8
Good
1,350 reviews
Delta
8.0
Very Good
8,786 reviews
Check prices

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

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
8,786 reviews
Check prices

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 10

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

British Airways
6.7
Okay
6,836 reviews
Delta
8.0
Very Good
8,786 reviews
Check prices

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

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.

  • 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 August 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

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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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