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Cheap flights from Seattle to Belfast City Airport from £493

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
30 Nov — 7 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Belfast City

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Belfast City (BHD). 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 31 October 2025.

Round-trip from

£493

Popular in

December

Cheapest in

March

Average price

£589
Virgin Atlantic
  • Virgin Atlantic
  • 3/12-7/12
  • 4 total stops
  • 46h 45m total
  • Seattle to Belfast
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£54 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
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Find flight deals from Seattle to Belfast City

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Belfast City
Explore the most affordable flight options available from Seattle to Belfast City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 October 2025.

Wed 3/1207:20SEA - BHD
2 stops29h 40mVirgin Atlantic
Sun 7/1206:30BHD - SEA
2 stops17h 05mVirgin Atlantic
Deal found 30/10£493
Wed 3/1218:50SEA - BHD
1 stop28h 40mBritish Airways
Sun 7/1220:25BHD - SEA
1 stop28h 30mBritish Airways
Deal found 30/10£549
Wed 3/1215:05SEA - BHD
1 stop17h 45mDelta
Sun 7/1217:20BHD - SEA
1 stop26h 30mDelta
Deal found 29/10£573
Mon 10/1114:35SEA - BHD
2 stops17h 30mMultiple Airlines
Sun 23/1106:30BHD - SEA
2 stops18h 30mMultiple Airlines
Deal found 30/10£609
Mon 10/1115:00SEA - BHD
1 stop22h 00mKLM
Sun 23/1106:30BHD - SEA
1 stop13h 15mKLM
Deal found 30/10£675

Cheapflights Fare Finder

 
Customise your flight search to find flights from Seattle to Belfast City 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 31 October 2025.
Use the filters below to find and compare flights from Seattle to Belfast City Airport that are best for you.

Fly from

Seattle

Fly to

Belfast City

Route

Depart

Return

Price

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 3/12

07:20-21:00

2 stops29h 40m

Belfast City

Sun 7/12

06:30-15:35

2 stops17h 05m

£493

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 24/2

14:35-20:30

2 stops21h 55m

Belfast City

Tue 3/3

07:20-17:00

2 stops17h 40m

£499

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 24/2

13:25-10:30

1 stop13h 05m

Belfast City

Tue 3/3

06:35-11:30

1 stop12h 55m

£519

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 24/2

13:45-16:50

2 stops19h 05m

Belfast City

Tue 3/3

06:30-11:35

1 stop13h 05m

£530

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 3/12

15:05-16:50

1 stop17h 45m

Belfast City

Sun 7/12

17:20-11:50

1 stop26h 30m

£573

Flights are sorted by cheapest return flights first.

Deals found on 29/10

Best time to book a flight from Seattle to Belfast City

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

Related info for your journey

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

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Belfast City. You should not have trouble finding flights to Belfast City from Seattle/Tacoma Intl; the airport handles an average of 0 outbound flights to Belfast City per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Seattle airport to Belfast City. It is only a 11.4 mi journey to Seattle/Tacoma Intl (SEA) from Seattle’s city center.

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

    Departing from Seattle to Belfast City Airport will take you 13h 05m. The distance between Seattle and Belfast City Airport is about 4472 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Belfast City 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 Belfast City Airport?

Book flights to Belfast City Airport if you plan to visit one of these locations
Bangor
Newcastle
Carrickfergus

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Belfast City

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

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

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

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

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

Yes! Start tracking prices for Seattle to Belfast City 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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