Flight tickets from Belfast (BELF) to Seattle (SEAA)

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Flight deals from Belfast to Seattle

Looking for a cheap last-minute deal or the best return flight from Belfast to Seattle? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Belfast to Seattle

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Belfast to Seattle flights are currently cheapest in April.

Belfast to Seattle: Flight information

The things to know before you go.
Cheapest flight found₹ 56,909
Cheapest month to flyApril

Finding cheap flights from Belfast to Seattle: Frequently asked questions

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.
The best price we found for a return flight from Belfast to Seattle is ₹ 80,489. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Belfast to Seattle. But we found flights with one or more stops from ₹ 80,489.
As of February 2026, there are no flights flying from Belfast to Seattle.
The cheapest month to fly from Belfast to Seattle is usually November.
If you're flying from Belfast, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the centre of Seattle. We've found flights into this airport from ₹ 80,489.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Belfast to Seattle on Thursday, 19 November 2026.
No airlines currently offer direct flights between Belfast and Seattle. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Seattle but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Seattle is around 40 days in advance, so don’t leave your flight to the last minute.
In February, the average temperature is usually around 4°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.
The cheapest airline that flies to Seattle is British Airways .

Flying from Belfast to Seattle: what you need to know

  • Get your holiday planning started by considering where you'll catch your flight from Belfast to Seattle. Belfast International Airport (BFS) and George Best Belfast City Airport (BHD) are the main airports in Belfast.

  • When it comes to landing in Seattle, Seattle-Tacoma International Airport (SEA) and Lake Union Sea Plane Base Airport (LKE) are the major entry points.

  • Seattle is seven hours behind Belfast and follows the UTC-7 timezone.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and one hour before domestic departures. That way, you won't have to rush to board your Belfast to Seattle flight.

  • Flying during a peak month like August? Public holidays and other high seasons can mean longer lines at security. Be extra cautious and arrive up to four hours before international flights and two hours before a domestic departure.

How to find the cheapest flights from Belfast to Seattle

  • Don't leave things to the last minute. You're more likely to get cheap Belfast to Seattle flights if you book in advance. Airlines often offer some excellent early bird discounts.

  • The 'Whole month' search tool shows you the cheapest plane tickets from Belfast to Seattle across each month. It's an easy way to find a bargain if your travel dates aren't set in stone.

  • Spend less time searching for cheap flights from Belfast to Seattle by setting up a Price Alert. You'll get an email or notification through the app when a lower fare becomes available.

  • Select your ideal arrival and departure times, number of stops and airlines with the filters. Or sort your Belfast to Seattle flight results by 'Fastest,' 'Cheapest' or 'Best.'

Flying from Belfast

Belfast International Airport (BFS)

  • A stopover is the ideal opportunity to take a break from travelling — and possibly even visit a new city. When searching for Belfast to Seattle flights leaving from Belfast International Airport, uncheck the 'Direct flights only' box to see where you can visit along the way. Consider one of these popular options:

    • Amsterdam Airport Schiphol (AMS)

    • Charles de Gaulle Airport (CDG)

    • Keflavik International Airport (KEF)

  • Travelling from central Belfast to BFS takes around 2 hours on public transport. If you ride-share, drive or get a cab, you'll cover the 19 kilometres in 30 minutes or so, depending on traffic conditions.

  • In search of a handy hotel close to Belfast International Airport? If you're catching an early flight from Belfast to Seattle, these stays will have you sleeping moments from your check-in counter:

  • 67.55% of flights taking off from Belfast International Airport touch down at their destination on schedule.

George Best Belfast City Airport (BHD)

  • Break up your Belfast to Seattle flight with a stop at London Heathrow Airport (LHR). One of the main stopovers between George Best Belfast City Airport and Seattle, it's a good opportunity to take a moment to relax.

  • You can get to BHD from the centre of Belfast in about 10 minutes by car, depending on traffic conditions. The journey on public transport takes roughly 20 minutes to travel the 5 kilometres or so.

  • You're off on holiday, so why not spend another night away? Think about staying at one of these accommodation options near George Best Belfast City Airport the day before your flight from Belfast to Seattle:

  • As far as flight punctuality goes, George Best Belfast City Airport has an on-time arrival rate of 68%.

Arriving in Seattle

Seattle-Tacoma International Airport (SEA)

  • The distance from Seattle-Tacoma International Airport (SEA) to central Seattle is approximately 19 kilometres. It'll take you about 20 minutes to get to the centre driving.

  • If you're taking public transport, expect a journey time of around 55 minutes.

  • The last thing you want is a lengthy journey to your hotel if you're getting in late on a flight from Belfast to Seattle. Check in to one of these accommodation options near SEA instead:

  • Fast-track your adventure by picking up a Seattle-Tacoma International Airport rental car. Grab your wheels from Thrifty, Europcar or Budget and explore beyond Seattle's main sights.

  • Booking your ride from Seattle-Tacoma International Airport around one week ahead gives you the best chance of locking in a great deal.

Lake Union Sea Plane Base Airport (LKE)

  • After your flight from Belfast to Seattle has landed, you can get to the city centre in around 10 minutes by car. Central Seattle is roughly 3 kilometres from Lake Union Sea Plane Base Airport (LKE).

  • If you hop on public transport, the journey will take you 25 minutes or so.

  • Hang up the 'Do not disturb' sign and rest at a hotel near LKE. Here are a few options where you can kick back after your flight from Belfast to Seattle:

Best time to go to Seattle

  • It's time to plan your travel dates for your flight from Belfast to Seattle. July is the busiest month to visit Seattle. If you like a quieter atmosphere, go in May.

  • Lock in a Belfast to Seattle ticket departing in August if you're eager to explore the city during its warmest month. Expect temperatures in Seattle to range from 12ºC to 28ºC.

  • If you'd rather travel in cooler conditions, search for a cheap flight from Belfast to Seattle in February when temperatures average between -1ºC and 11ºC.

More about Seattle

  • When it comes to searching for somewhere to rest your head, you'll find the top stays in Seattle right here. Check out these options once you've locked in your flight from Belfast to Seattle:

  • Every great holiday has to include some sightseeing. Greyhound: Bus Station, LMN Architects and Boeing Radiation Effects Lab are must-do's during your Seattle adventure.

Explore more of United States

  • Seattle has plenty going for it, but there are so many other corners of United States just waiting to be explored. Around 241 kilometres south of Seattle, a visit to Portland will keep your itinerary packed. Don't miss top attractions like Pioneer Courthouse Square, Portland Japanese Garden and Pittock Mansion.

  • If you're eager to discover another major stop in United States, consider Spokane, about 370 kilometres east of Seattle. Manito Park, Northwest Museum of Arts & Culture and Spokane Falls are key reasons to visit.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.