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Cheap flights from Northern Ireland to Seattle from £530

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/2. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SEA
18 אוק' — 25 אוק'1
1 adult
1 adult, Economy

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 18 ספטמבר 2025.

Round-trip from

£530

Popular in

November

Cheapest in

May

Average price

£550
13/2-17/2
  • 13/2-17/2
  • 4 total stops
  • 36h 25m total
  • Northern Ireland to Seattle
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£66 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
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Find flight deals from Northern Ireland to Seattle

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 18 ספטמבר 2025.

ו' 13/206:45BHD - SEA
2 stops18h 15mMultiple Airlines
ג' 17/214:35SEA - BHD
2 stops18h 10mMultiple Airlines
Deal found 17/9£530
ו' 13/211:30BHD - SEA
1 stop13h 25mBritish Airways
ג' 17/218:50SEA - BHD
1 stop15h 50mBritish Airways
Deal found 17/9£543
ה' 5/306:35BHD - SEA
1 stop18h 20mAmerican Airlines
ב' 9/313:48SEA - BHD
2 stops21h 47mAmerican Airlines
Deal found 15/9£552

Cheapflights Fare Finder

 
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 18 ספטמבר 2025.
Use the filters below to find and compare flights from Northern Ireland to Seattle that are best for you.

Fly from

Northern Ireland

Fly to

Seattle

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

ו' 13/2

06:45-17:00

2 stops18h 15m

Seattle/Tacoma Intl

ג' 17/2

14:35-16:45

2 stops18h 10m

£530

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

ו' 13/2

11:30-16:55

1 stop13h 25m

Seattle/Tacoma Intl

ג' 17/2

18:50-18:40

1 stop15h 50m

£543

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

ה' 5/3

06:35-16:55

1 stop18h 20m

Seattle/Tacoma Intl

ב' 9/3

13:48-18:35

2 stops21h 47m

£552

Flights are sorted by cheapest return flights first.

Deals found on 17/9

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.

Cheapflights Insights

Everything you need to know about your flight from Northern Ireland to Seattle
No data available for this route at this time. Please check back soon.

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.

  • How long is the flight from Northern Ireland to Seattle?

    For as low as £543, British Airways can have you in Seattle from Northern Ireland in 13h 25m. Airlines will cover a distance of 4472 mi. Both multi-stop and direct flights can be found to your destination and back.

  • 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell
SeaTac

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Alternative routes for Northern Ireland to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Northern Ireland to Seattle

Discover the top 2 airlines 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 18 ספטמבר 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£431Average£515FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£550Average£550FlexibilityNo cancel feeOn-time71%
Search American Airlines 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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