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Cheap flights from Belfast City Airport to Seattle from £418

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 24/8. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SEA
13 Jun — 20 Jun1
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 14 May 2026.

Mon 15/608:45
BHD
-
SEA
2 stops35h 00m
Multiple Airlines
Mon 22/619:00
SEA
-
BHD
2 stops17h 30m
Multiple Airlines
Deal found 13/5£715
Tue 1/906:30
BHD
-
SEA
1 stop13h 05m
British Airways
Tue 22/920:20
SEA
-
BHD
1 stop15h 20m
British Airways
Deal found 12/5£719
Tue 6/1009:40
BHD
-
SEA
1 stop16h 45m
British Airways
Tue 20/1011:34
SEA
-
BHD
2 stops19h 46m
British Airways
Deal found 8/5£720
Tue 6/1009:40
BHD
-
SEA
2 stops22h 34m
Multiple Airlines
Tue 20/1011:34
SEA
-
BHD
2 stops19h 46m
Multiple Airlines
Deal found 8/5£725
Wed 4/1109:15
BHD
-
SEA
2 stops22h 03m
British Airways
Sun 8/1114:46
SEA
-
BHD
2 stops39h 29m
British Airways
Deal found 12/5£751
Wed 7/1006:30
BHD
-
SEA
1 stop13h 05m
British Airways
Sun 11/1020:20
SEA
-
BHD
1 stop16h 15m
British Airways
Deal found 12/5£776
Tue 1/909:40
BHD
-
SEA
2 stops22h 10m
Multiple Airlines
Tue 22/913:24
SEA
-
BHD
2 stops17h 56m
Multiple Airlines
Deal found 12/5£779

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 14 May 2026.

Round-trip from

£715

One-way from

£418
15/6-22/6
  • 15/6-22/6
  • 4 total stops
  • 52h 30m total
  • Belfast to Seattle
Search Deals
24/8
  • 24/8
  • 3 total stops
  • 34h 15m 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 14 May 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

Tue 6/10

09:40-18:25

1 stop16h 45m

Seattle/Tacoma Intl

Tue 20/10

11:34-15:20

2 stops19h 46m

£720

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/11

06:35-16:55

1 stop18h 20m

Seattle/Tacoma Intl

Sun 8/11

11:42-10:40

2 stops38h 58m

£751
Fastest return journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 7/10

06:30-11:35

1 stop13h 05m

Seattle/Tacoma Intl

Sun 11/10

20:20-20:35

1 stop16h 15m

£776
Cheapest one-way

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 25/8

14:20-09:48

3 stops51h 28m

£456
Fastest single journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 25/8

20:25-11:35

1 stop23h 10m

£529

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sun 5/7

20:10-11:35

1 stop23h 25m

£585

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sun 5/7

20:10-17:10

2 stops29h 00m

£611

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/8

19:35-11:35

1 stop24h 00m

£803

Flights are sorted by cheapest return flights first.

Deals found on 9/5

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 £720, British Airways can have you in Seattle from Belfast City Airport in 16h 45m. The distance between Belfast City Airport and Seattle is about 4472 mi.

  • 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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