Cheap Flights from Bangkok (BKK) to Seattle (SEA)

Frequently Asked Questions

• What are the cheapest flights from Bangkok to Seattle (BKK-SEA)?

  Based on Trip.com data, Hainan Airlines offers one-way fares as low as US$400 on Cheapest nonstop routes (e.g. BKK to SEA on Wed, Feb 4), while Philippine Airlines offers Cheapest nonstop round-trips from US$603 departing on Tue, Feb 3 and returning on Fri, Feb 6.

• Which airlines offer flights from Bangkok to Seattle?

  At the moment, several airlines serve connecting flights from Bangkok to Seattle, including: Philippine Airlines STARLUX Airlines China Airlines American Airlines EVA Air Selected airlines are based on historical data collected from flight bookings made by users on Trip.com within the last 90 days.

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

  To find best deals on flights from Bangkok 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 Wed, Feb 4, with one-way flights priced at just US$400.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Hainan Airlines.
  · 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 are flight tickets from Bangkok (BKK) to Seattle (SEA) the cheapest?

  The cheapest months to fly from Bangkok to Seattle is October, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Bangkok to Seattle on?

  After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Bangkok to Seattle on December 17, 2025 with Hainan Airlines, with prices starting at US$378.

• Which airports can I fly to for Seattle from Bangkok?

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

• Is there any time difference between Bangkok and Seattle?

  The time difference between Seattle and Bangkok is 15h.

• How do I change or cancel my ticket from Bangkok to Seattle?

  Tickets can only be changed or canceled 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.