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Cheap flights from Belfast City Airport to Seattle from £503

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 3/8. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SEA
9 Jul — 16 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast City to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Belfast City to Seattle
Explore the most affordable flight options available from Belfast City to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 June 2026.

Wed 16/920:35
BHD
-
SEA
1 stop23h 00m
British Airways
Wed 7/1011:34
SEA
-
BHD
2 stops16h 26m
British Airways
Deal found 7/6£573
Tue 1/906:30
BHD
-
SEA
1 stop13h 05m
British Airways
Tue 22/920:20
SEA
-
BHD
1 stop14h 35m
British Airways
Deal found 6/6£576
Tue 15/909:40
BHD
-
SEA
2 stops19h 56m
British Airways
Tue 6/1020:20
SEA
-
BHD
1 stop13h 15m
British Airways
Deal found 9/6£578
Tue 15/909:50
BHD
-
SEA
1 stop33h 57m
KLM
Tue 6/1017:45
SEA
-
BHD
1 stop15h 10m
KLM
Deal found 9/6£579
Mon 7/915:20
BHD
-
SEA
1 stop28h 15m
British Airways
Mon 28/917:40
SEA
-
BHD
2 stops17h 05m
British Airways
Deal found 9/6£594
Mon 7/919:35
BHD
-
SEA
1 stop24h 00m
Multiple Airlines
Mon 28/913:30
SEA
-
BHD
1 stop15h 25m
Multiple Airlines
Deal found 9/6£603
Tue 1/920:25
BHD
-
SEA
2 stops30h 22m
Multiple Airlines
Tue 22/913:38
SEA
-
BHD
2 stops17h 42m
Multiple Airlines
Deal found 6/6£620

Find flight deals from Belfast City to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Belfast City (BHD) 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 9 June 2026.

Round-trip from

£573

One-way from

£503
British Airways
  • British Airways
  • 16/9-7/10
  • 3 total stops
  • 39h 26m total
  • Belfast to Seattle
Search Deals
Aer Lingus
  • Aer Lingus
  • 3/8
  • 2 total stops
  • 29h 35m total
  • Belfast to Seattle
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast City 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 9 June 2026.
Use the filters below to find and compare flights from Belfast City Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 16/9

20:35-11:35

1 stop23h 00m

Seattle/Tacoma Intl

Wed 7/10

13:30-13:35

1 stop16h 05m

£573

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 15/9

09:50-11:47

1 stop33h 57m

Seattle/Tacoma Intl

Tue 6/10

17:45-16:55

1 stop15h 10m

£579

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 15/9

09:40-21:36

2 stops19h 56m

Seattle/Tacoma Intl

Tue 6/10

12:00-15:20

2 stops19h 20m

£585

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 7/9

15:20-11:35

1 stop28h 15m

Seattle/Tacoma Intl

Mon 28/9

17:40-18:45

2 stops17h 05m

£594

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 7/9

19:35-11:35

1 stop24h 00m

Seattle/Tacoma Intl

Mon 28/9

13:30-12:55

1 stop15h 25m

£603
Fastest return journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 1/9

06:30-11:35

1 stop13h 05m

Seattle/Tacoma Intl

Tue 22/9

13:38-15:20

2 stops17h 42m

£606
Cheapest one-way

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/8

19:35-17:10

2 stops29h 35m

£503
Fastest single journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/8

06:30-11:35

1 stop13h 05m

£578

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/8

06:30-18:45

1 stop20h 15m

£814

Flights are sorted by cheapest return flights first.

Deals found on 9/6

Sorted by cheapest first

Best time to book a flight from Belfast City to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Belfast City 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.

Related info for your journey

Find useful and relevant information for your journey from Belfast City 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 Belfast City?

    Most people fly into Seattle/Tacoma Intl (SEA) if they book a flight to Seattle from Belfast City. On average, Seattle/Tacoma Intl has 0 inbound flights from Belfast City per day from 0 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • How long is the flight from Belfast City Airport to Seattle?

    For as low as £573, British Airways can have you in Seattle from Belfast City Airport in 23h. The distance between Belfast City Airport and Seattle is about 4472 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Belfast City to Seattle that include hotel bookings?

    Yes. In addition to deals on Belfast City to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Belfast City to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast City to Seattle.

  • Can I find deals for business class flights from Belfast City to Seattle?

    Yes. Cheapflights offers flight deals from Belfast City 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.

See more FAQs

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Federal Way
SeaTac

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Belfast City to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Belfast Intl to Seattle flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Belfast City to Seattle?

Cheapflights helps you search for flights from Belfast City to Seattle via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Belfast City to Seattle?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Belfast City to Seattle for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Belfast City to Seattle with no change fees?

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

Can Cheapflights notify me if prices for flights from Belfast City to Seattle become cheaper?

Yes! Start tracking prices for Belfast City 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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