Cheap Flights from Siem Reap to Udon Thani from US$127

Frequently Asked Questions

• What are the cheapest flights from Siem Reap to Udon Thani (REP-UTH)?

  Based on Trip.com data, Thai AirAsia offers one-way fares as low as US$127 on Cheapest nonstop routes (e.g. SAI to UTH on Mon, Dec 15), while Thai AirAsia offers Cheapest nonstop round-trips from US$281 departing on Mon, Dec 29 and returning on Wed, Dec 31.

• When is the best time to book flights from Siem Reap to Udon Thani?

  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 Udon Thani 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 Udon Thani?

  To find best deals on flights from Siem Reap to Udon Thani, 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 US$127.
  · 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 Udon Thani travel is around January.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Siem Reap (REP) to Udon Thani (UTH) the cheapest?

  The cheapest months to fly from Siem Reap to Udon Thani is September, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Siem Reap to Udon Thani on?

  After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Siem Reap to Udon Thani on December 29, 2025 with Thai AirAsia, with prices starting at US$280.

• Is there any time difference between Siem Reap and Udon Thani?

  The time difference between Udon Thani and Siem Reap is 0h.

• How do I change or cancel my ticket from Siem Reap to Udon Thani?

  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.