Cheap Flights from Siem Reap to Koh Samui from IDR 2,940,753

Frequently Asked Questions

• What are the cheapest flights from Siem Reap to Koh Samui (REP-USM)?

  Based on Trip.com data, Thai AirAsia offers one-way fares as low as IDR 2,940,753 on Cheapest nonstop routes (e.g. SAI to USM on Mon, Dec 15), while Thai AirAsia offers Cheapest nonstop round-trips from IDR 7,173,547 departing on Thu, Jan 15 and returning on Thu, Jan 22.

• When is the best time to book flights from Siem Reap to Koh Samui?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Siem Reap to Koh Samui 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 Siem Reap to Koh Samui?

  To find best deals on flights from Siem Reap to Koh Samui, 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 Mon, Dec 15, with one-way flights priced at just IDR 2,940,753.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Thai AirAsia.
  · 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 Koh Samui travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Siem Reap (REP) to Koh Samui (USM) the cheapest?

  The cheapest months to fly from Siem Reap to Koh Samui is October, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Siem Reap to Koh Samui on?

  After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Siem Reap to Koh Samui on December 11, 2025 with Thai AirAsia, with prices starting at IDR 7,405,027.

• Is there any time difference between Siem Reap and Koh Samui?

  The time difference between Koh Samui and Siem Reap is 0h.

• How do I change or cancel my ticket from Siem Reap to Koh Samui?

  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.