HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$806+ Cheap flights from Belfast to Seattle (SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SEA
dic. 6 — dic. 131
sáb. 12/6
sáb. 12/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Belfast to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Belfast to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Belfast (BF1) 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 noviembre 6, 2025.

Round-trip from

$817
(TravelUp)
From Belfast to Seattle/Tacoma Intl
Search Deals

Find flight deals from Belfast to Seattle

Best flights from Belfast to Seattle
Discover carefully curated flight deals from Belfast to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated noviembre 6, 2025.

This TravelUp deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/221:50 pmBHD - SEA
1 stop12h 35mBritish Airways
lun. 5/41:35 pmSEA - BHD
1 stop15h 20mBritish Airways
Deal found 11/5$806
This Air France deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/226:30 amBHD - SEA
2 stops17h 43mMultiple Airlines
lun. 5/45:35 pmSEA - BHD
1 stop15h 20mMultiple Airlines
Deal found 11/5$841
This American Airlines deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/53:05 pmBHD - SEA
1 stop28h 25mAmerican Airlines
lun. 3/93:35 pmSEA - BHD
2 stops35h 55mAmerican Airlines
Deal found 11/5$854
This TravelUp deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/216:35 amBHD - SEA
1 stop13h 00mBritish Airways
lun. 5/41:35 pmSEA - BHD
1 stop18h 05mBritish Airways
Deal found 11/5$817
This Mytrip deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/226:00 amBFS - SEA
1 stop20h 25mMultiple Airlines
lun. 5/47:00 pmSEA - BFS
2 stops20h 05mMultiple Airlines
Deal found 11/5$908
This Mytrip deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/218:55 pmBFS - SEA
1 stop22h 40mMultiple Airlines
lun. 5/43:45 pmSEA - BFS
2 stops23h 20mMultiple Airlines
Deal found 11/5$916

Cheapflights Fare Finder

 
Customize your flight search to find flights from Belfast 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 2,558,603 searches. Data last updated noviembre 6, 2025.
Use the filters below to find and compare flights from Belfast to Seattle that are best for you.

Fly from

Belfast

Fly to

Seattle

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

mié. 4/22

1:50 pm-6:25 pm

1 stop12h 35m

Seattle/Tacoma Intl

lun. 5/4

1:35 pm-12:55 pm

1 stop15h 20m

$806

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

mar. 4/21

6:35 am-11:35 am

1 stop13h 00m

Seattle/Tacoma Intl

lun. 5/4

1:35 pm-3:40 pm

1 stop18h 05m

$817

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

mié. 4/22

6:30 am-4:13 pm

2 stops17h 43m

Seattle/Tacoma Intl

lun. 5/4

5:35 pm-4:55 pm

1 stop15h 20m

$841

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

jue. 3/5

3:05 pm-11:30 am

1 stop28h 25m

Seattle/Tacoma Intl

lun. 3/9

3:35 pm-10:30 am

2 stops35h 55m

$854

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

mié. 4/22

6:00 am-6:25 pm

1 stop20h 25m

Seattle/Tacoma Intl

lun. 5/4

7:00 pm-11:05 pm

2 stops20h 05m

$908

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

mar. 4/21

8:55 pm-11:35 am

1 stop22h 40m

Seattle/Tacoma Intl

lun. 5/4

3:45 pm-11:05 pm

2 stops23h 20m

$916

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Best time to book a flight from Belfast to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Belfast with our price prediction graph.
Estimated round-trip 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 Belfast 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 Belfast 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?

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

  • How long is the flight from Belfast to Seattle?

    Departing from Belfast to Seattle will take you 12h 35m. Airlines will cover a distance of 4472 mi. This flight may include one or multiple stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Tukwila
Lakewood
Olympia
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Kirkland
Lacey
Kent
Cle Elum
Marysville
Puyallup
Federal Way
Fife
Issaquah
Aberdeen

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Belfast to Seattle

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

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.