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Cheap Flights from Siem Reap to Udon Thani

Find the cheapest flights from Siem Reap to Udon Thani within the next three months. Book one-way flights from MOP 1,012 or return tickets from MOP 2,248.

      • SAI 20:45
        22h 45m
        1 stop
        UTH 19:30
        Siem Reap - Udon Thani | Mon, Dec 29 | Thai AirAsia
        UTH 09:10
        10h 50m
        1 stop
        SAI 20:00
        Udon Thani - Siem Reap | Wed, Dec 31 | Thai AirAsia
        MOP 2,248 MOP 6,476
        65% OFF
        65% OFF
        MOP 6,476 MOP 2,248
      • SAI 20:45
        11h 25m
        1 stop
        UTH 08:10
        Siem Reap - Udon Thani | Mon, Dec 22 | Thai AirAsia
        UTH 08:40
        11h 20m
        1 stop
        SAI 20:00
        Udon Thani - Siem Reap | Tue, Dec 30 | Thai AirAsia
        MOP 2,337 MOP 6,476
        64% OFF
        64% OFF
        MOP 6,476 MOP 2,337
      • SAI 09:50
        10h 35m
        1 stop
        UTH 20:25
        Siem Reap - Udon Thani | Mon, Dec 22 | Thai Airways
        UTH 20:55
        11h 50m
        1 stop
        SAI 08:45
        Udon Thani - Siem Reap | Tue, Dec 30 | Thai Airways
        MOP 3,523 MOP 6,476
        46% OFF
        46% OFF
        MOP 6,476 MOP 3,523
      • SAI 20:45
        12h 15m
        1 stop
        UTH 09:00
        Siem Reap - Udon Thani | Sat, Dec 20 | Thai AirAsia
        UTH 09:40
        10h 20m
        1 stop
        SAI 20:00
        Udon Thani - Siem Reap | Wed, Dec 24 | Thai Lion Air
        MOP 3,579
        45% OFF
        MOP 6,476 MOP 3,579
      • SAI 19:25
        12h 45m
        1 stop
        UTH 08:10
        Siem Reap - Udon Thani | Mon, Dec 29 | Bangkok Airways
        UTH 09:10
        9h 35m
        1 stop
        SAI 18:45
        Udon Thani - Siem Reap | Wed, Dec 31 | Thai AirAsia
        MOP 3,867
        40% OFF
        MOP 6,476 MOP 3,867
      • SAI 09:50
        22h 10m
        1 stop
        UTH 08:00
        Siem Reap - Udon Thani | Sat, Dec 20 | Thai Airways
        UTH 20:55
        11h 50m
        1 stop
        SAI 08:45
        Udon Thani - Siem Reap | Wed, Dec 24 | Thai Airways
        MOP 3,973
        39% OFF
        MOP 6,476 MOP 3,973
      • SAI 09:50
        10h 35m
        1 stop
        UTH 20:25
        Siem Reap - Udon Thani | Fri, Dec 26 | Thai Airways
        UTH 08:30
        24h 15m
        1 stop
        SAI 08:45
        Udon Thani - Siem Reap | Mon, Dec 29 | Thai Airways
        MOP 4,209
        35% OFF
        MOP 6,476 MOP 4,209
      • SAI 09:50
        10h 35m
        1 stop
        UTH 20:25
        Siem Reap - Udon Thani | Mon, Dec 29 | Thai Airways
        UTH 20:55
        11h 50m
        1 stop
        SAI 08:45
        Udon Thani - Siem Reap | Wed, Dec 31 | Thai Airways
        MOP 4,288
        34% OFF
        MOP 6,476 MOP 4,288
      • SAI 09:55
        22h 35m
        1 stop
        UTH 08:30
        Siem Reap - Udon Thani | Sat, Dec 20 | Bangkok Airways
        UTH 09:00
        9h 45m
        1 stop
        SAI 18:45
        Udon Thani - Siem Reap | Wed, Dec 24 | Thai AirAsia
        MOP 4,433
        32% OFF
        MOP 6,476 MOP 4,433
      • SAI 13:20
        6h 10m
        1 stop
        UTH 19:30
        Siem Reap - Udon Thani | Mon, Dec 22 | Bangkok Airways
        UTH 08:40
        10h 5m
        1 stop
        SAI 18:45
        Udon Thani - Siem Reap | Tue, Dec 30 | Thai AirAsia
        MOP 4,533
        30% OFF
        MOP 6,476 MOP 4,533
      • REP 13:00
        17h 25m
        1 stop
        UTH Invalid Date
        Siem Reap - Udon Thani | Thu, Dec 11 | Normal Airline
        UTH 15:00
        6h
        Direct
        REP 16:00
        Udon Thani - Siem Reap | Sat, Dec 13 | Normal Airline
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Displayed flight fares from Siem Reap to Udon Thani are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight details for Siem Reap to Udon Thani

The distance between Siem Reap and Udon Thani is approximately 455.52km. Based on Trip.com's data travel demand peaks in January. The off-season for travel is September.

Cheapest direct flight priceMOP 1,012
Cheapest return ticket priceMOP 2,248
Off-season for travelSeptember
Peak season for travelJanuary
Flight distance455.52km

Find the best time to fly from Siem Reap to Udon Thani

The cheapest time for Siem Reap to Udon Thani flights: Dec 14 to Dec 21 — one way flight prices from MOP 1,012.

Cheapest flights
From price
Search
  • 714
  • 1421
  • 2128

  • Jan

    284
  • 411
  • 1118
  • 1825

  • Feb

    251
  • 18
  • 815
  • 1522

  • Mar

    221
Displayed fare trends are based on Trip.com's aggregated average of the lowest flight prices from Siem Reap to Udon Thani, calculated over the upcoming 10 weeks.

Flight FAQs

  • Which airlines offer the cheapest flights from Siem Reap (REP) to Udon Thani (UTH)?

    Based on Trip.com data, Thai AirAsia offers one-way fares as low as MOP 1,012 on Cheapest nonstop routes (e.g. SAI to UTH on Mon, Dec 15), while Thai AirAsia offers Cheapest nonstop round-trips from MOP 2,248 departing on Mon, Dec 29 and returning on Wed, Dec 31.
  • 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.
  • 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 MOP 1,012.
    · 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.
  • The cheapest months to fly from Siem Reap to Udon Thani is September, when demand for travel is lower.
  • 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 MOP 2,247.
  • The time difference between Udon Thani and Siem Reap is 0h.
  • 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.

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