Title: Cheap Flights from Seattle (SEA) to Belfast (BFS) - Expedia.ca ![](https://images.trvl-media.com/place/6034919/409864ad-0adb-4a19-a7e9-f03dc552810c.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/6034919/409864ad-0adb-4a19-a7e9-f03dc552810c.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from Seattle (SEA) to Belfast (BFS) - [Roundtrip](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Seattle-Tacoma International Airport (SEA) to Belfast International Airport (BFS) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AC.svg) Air Canada [](https://www.expedia.ca/Flights-Search?leg1=from:SEA,to:BFS,departure:24/02/2026TANYT&leg2=from:BFS,to:SEA,departure:03/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AC"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_WS.svg) WestJet [](https://www.expedia.ca/Flights-Search?leg1=from:SEA,to:BFS,departure:24/02/2026TANYT&leg2=from:BFS,to:SEA,departure:03/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WS"}}]) - ![](https://a.travel-assets.com/air/airlines/f8_sq.svg) Flair Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:SEA,to:BFS,departure:24/02/2026TANYT&leg2=from:BFS,to:SEA,departure:03/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"F8"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:SEA,to:BFS,departure:24/02/2026TANYT&leg2=from:BFS,to:SEA,departure:03/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.ca/Flights-Search?leg1=from:SEA,to:BFS,departure:24/02/2026TANYT&leg2=from:BFS,to:SEA,departure:03/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.ca/Flights-Search?leg1=from:SEA,to:BFS,departure:24/02/2026TANYT&leg2=from:BFS,to:SEA,departure:03/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_PD.svg) Porter Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:SEA,to:BFS,departure:24/02/2026TANYT&leg2=from:BFS,to:SEA,departure:03/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"PD"}}]) - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 30% on select hotels after you book a flight\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.ca/login) ## Find the cheapest month to fly from Seattle (SEA) to Belfast (BFS) ### January is typically the cheapest month to fly From CA $872 - CA $1,518 per traveller. __Flight from Seattle to Belfast (SEA - BFS) route information__ | Origin airport | Seattle - Tacoma Intl. | | ------------------- | ---------------------- | | Destination airport | Belfast Intl. | | Distance | 7141 km | ## Seattle to Crumlin Flights **The easy way to book your flights from Seattle to Belfast** With Expedia, it’s simple to find and book flights to Belfast from Seattle whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from airlines that cover this route. There are nonstop flights to Belfast Intl., too. Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Seattle to Belfast today, tomorrow, or this week. **Save dollars with cheap flights from Seattle - Tacoma Intl., SEA to Belfast Intl., BFS** Sort your search results by price to find great deals on your flight from Seattle to Belfast—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Belfast from Seattle currently is just rising to . Here are more money-saving tips: - Fly in when flight prices are normally at their lowest - Book about a month to 6 weeks before you travel for the best prices to Belfast - Avoid peak season and weekends when flights can cost more - Early morning and late-night flights are sometimes cheaper, so try varying your travel times - One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! **Reasons to choose Expedia for your flight to Belfast from Seattle** Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Belfast with Expedia today. ## Frequently asked questions ### How much is a flight from Sea-Tac Airport to Belfast Intl. Airport (BFS)? ### Do I need to pay a cancellation fee if I cancel my flight from Sea-Tac Airport to BFS? ### How do I find cheap flights from Sea-Tac Airport to Belfast Intl. Airport (BFS) that have flexible change policies? ### How far is the flight from Seattle - Tacoma Intl. Airport (SEA) to BFS? ### Which airlines fly direct from Sea-Tac Airport to Belfast International Airport? ### Are Seattle - Tacoma Intl. Airport (SEA) to BFS flight tickets cheaper when they're purchased at the last minute? \*Available to Expedia members.