Cheap Flights Glasgow – Seattle from £377

Flight FAQs

• Which airlines offer the cheapest flights from Glasgow (GLA) to Seattle (SEA)?

  Based on Trip.com data, WestJet offers one-way fares as low as £377 on Cheapest nonstop routes (e.g. GLA to SEA on Thu, May 21), while British Airways offers Cheapest nonstop round-trips from £679 departing on Tue, Apr 21 and returning on Sun, Apr 26.

• Which airlines offer direct flights from Glasgow to Seattle?

  At the moment, you can catch a direct flight from Glasgow to Seattle with the following airlines, including: Icelandair Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• When is the best time to book flights from Glasgow to Seattle?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Glasgow to Seattle is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How can I find the best deals on flights from Glasgow to Seattle?

  To find best deals on flights from Glasgow to Seattle, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Thu, May 21, with one-way flights priced at just £377.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is WestJet.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for Seattle travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When is the best time to book a flight from Glasgow to Seattle to get the best price?

  The cheapest months to fly from Glasgow to Seattle is September, when demand for travel is lower.

• Which upcoming date is the cheapest for flights from Glasgow to Seattle?

  After crunching the numbers on our April flight calendar, it's currently cheapest to fly from Glasgow to Seattle on April 20, 2026 with Icelandair, with prices starting at £456.

• Which airports can I fly through when travelling to Seattle from Glasgow?

  You can land at any one of the following hubs in Seattle, with Glasgow Airport to Seattle-Tacoma International Airport (GLA-SEA) is by far the most common option on this route: King County (Boeing Field) International Airport (BFI) Kenmore Air Harbor Seaplane Base (LKE) Seattle-Tacoma International Airport (SEA).

• What is the time difference between Glasgow and Seattle?

  The time difference between Seattle and Glasgow is 8h.

• How can I change or cancel my flight ticket from Glasgow to Seattle?

  Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.