CA $812 Cheap Flights from Belfast (BFS) to Seattle (SEA)

Based on airfares listed within the last 7 days on Expedia for flights departing within the next year, round-trip journeys between BFS and Seattle - Tacoma Intl. Airport (SEA) start from . Book now to get the best price for your trip. Prices and availability are subject to change. Additional terms apply.

Every airline has a different set of terms and conditions. If you decide to cancel your escape, head to our Customer Service Portal.

Many carriers offer the option to reschedule your flight at no extra charge. All you pay is the cost difference between the two flights. When searching for Belfast Intl. Airport (BFS) to Seattle - Tacoma Intl. Airport (SEA) flights, you'll see a "No change fees" filter for you to pick.

You'll have 7,200 kilometres to cover on the long-haul Crumlin to SeaTac route. Dress in layers of comfortable clothes and consider taking a pair of noise-cancelling headphones.

Flying nonstop between BFS and Sea-Tac Airport isn't possible at present. However, you'll still be able to find a flight to SeaTac with at least one stop.

Flight prices are constantly going up and down, so there are no guarantees. While last-minute deals between Belfast International Airport and SEA are of course possible, it also makes sense to keep track of prices well before you fly. In fact, some airlines publicize their prices up to 12 months prior to the departure date. Expedia is continuously updating the biggest airfare bargains around, so keep checking back and be ready to grab your seat when the price is right.