Flight tickets / Seattle / Koh Samui / Seattle — Koh Samui
China Airlines

China Airlines

Seattle → Koh Samui

30 Nov 2026, Mon

Ticket prices are dynamic and may vary

Cheap flight tickets from Seattle to Koh Samui

Wish to buy the cheapest flights from Seattle to Koh Samui at the lowest price? We compare prices of Seattle – Koh Samui direct flights and flights with stopovers among 750 airlines and agencies. Don't waste your time searching for the lowest airfares on your own. Book your tickets online and take advantage of discounts, special offers and low-cost flight sales. Our full flight timetable will help you find a Seattle – Koh Samui flight ticket. To choose the desired flight option, check flight days and ticket availability for a specific date.

To book a ticket online, enter the desired type of flight, number of passengers, class, and departure and arrival dates, then proceed with payment. You will receive an email with your order information.

Seattle – Koh Samui flight ticket price

How much does a flight to Koh Samui from Seattle cost? How can you buy a cheap plane ticket? We compare ticket prices using the Price Dynamic Service. Here are a few tips:

  1. Prices depend on the month of departure. We recommend booking first and business class tickets in advance. Economy class tickets should also be purchased early — ideally 2–4 months before departure.
  2. The cheapest flights SEA – USM are usually available on Wednesday and Thursday. Prices tend to be higher on weekends.
  3. It is generally cheaper to buy a round-trip ticket rather than two one-way tickets.

Useful information before you book your travel from Seattle to Koh Samui

Our service provides the following information:

  • Distance from Seattle to Koh Samui
  • Airlines operating direct flights from Seattle to Koh Samui
  • Airlines offering the cheapest tickets from Seattle to Koh Samui
  • Duration of the Seattle – Koh Samui flight
  • Departure and arrival airports for Seattle – Koh Samui

The price of tickets by month

Ticket prices are dynamic and may vary

Cheap tickets Seattle - Koh Samui

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