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Find Cheap Flights from Belfast to Seattle – Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Direct flights
Not available
There are currently no direct flights between Belfast and Seattle. You'll need to take a connecting flight to reach the destination.
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Cheap Flights from Belfast to Seattle

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Belfast to Seattle

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BF1  Bere Ferrers-SEA Seattle/Tacoma Airport
4471 mimulti-stop
Multiple Airlines Logo
SEA  Seattle/Tacoma Airport-BF1 Bere Ferrers
4471 mimulti-stop
Multiple Airlines
Booking Insights

Price, demand, and travel trends for Belfast to Seattle flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from Belfast to Seattle with more confidence.

What is the cheapest stopover airport when flying from Belfast to Seattle?

Flights via London Heathrow (LHR) offer the most affordable fares, with an average return price of £814. Based on KAYAK data over the past 3 months.

When flying from Belfast to Seattle, which airport offers the shortest stopover?

London Heathrow (LHR) had the shortest average connection time for Belfast to Seattle stopovers at 518 minutes over the past 3 months.

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When to book flights from Belfast to Seattle

Are your dates flexible? Find out the best times to travel from Belfast to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your Belfast to Seattle flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • Which cabin classes can I book on flights from Belfast to Seattle?

    Only Economy class is available on flights from Belfast to Seattle.

  • How long is a flight from Belfast to Seattle?

    A direct flight from Belfast to Seattle takes 0h 00m, covering 4,471 miles.

  • Do I need a passport to fly from Belfast to Seattle?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Belfast to Seattle flight?

    Return flights from Belfast to Seattle range from £719 to £756, with an average of £737 over the past 12 months. Anything below £719 counts as a good deal.

  • Which car hire options are available at Seattle/Tacoma Intl Airport (SEA)?

    Seattle/Tacoma Intl Airport (SEA) hosts 5 major car hire companies, with daily rates starting from around £3 for economy cars. Top options include:
    • Fox
    • Europcar
    • Thrifty
    • Budget
    • Dollar

  • Which airports can I use when flying from Belfast to Seattle?

    Flights from Belfast to Seattle may depart from several airports in Belfast area, including Belfast Intl (BFS) and Belfast City (BHD). Flights usually arrive at Seattle/Tacoma Intl (SEA).

  • Which airports do connecting flights from Belfast to Seattle pass through?

    Most connecting flights from Belfast to Seattle pass through London Heathrow (LHR), which handles 100% of one-stop traffic on this route. Other stopover airports each see under 5%.

  • Can I save money by using flexible dates for flights from Belfast to Seattle?

    Yes. Being flexible with your travel dates can save you up to 46% on the Belfast to Seattle route. Thursday is the cheapest departure day at £574 return on average, while Sunday is the most expensive at £1,059, a difference of £484. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What is the time difference between Belfast and Seattle?

    Seattle is 8 hours behind Belfast (Pacific Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are The Westin Seattle, Seattle Center, and Seattle Marriott Waterfront. These are among the most viewed places in Seattle on KAYAK.

Your guide to booking Belfast to Seattle flights

Get tips on when to book, when to fly, and what to know before your trip.

More options for your flight from Belfast to Seattle

Complete your trip to Seattle with a hotel stay or car hire

Car hire in Seattle
Hotels in Seattle
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