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Flights from Chiang Rai to Koh Samui

Find the cheapest flight options from Chiang Rai to Koh Samui over the next three months. Book one-way tickets from KRW 156,088 and round-trip tickets from KRW 399,584.

      • CEI 08:40
        12h 40m
        1 stop
        USM 21:20
        Chiang Rai - Koh Samui | Wed, Dec 10 | Thai AirAsia
        USM 07:00
        8h 55m
        1 stop
        CEI 15:55
        Koh Samui - Chiang Rai | Wed, Dec 17 | Bangkok Airways
        KRW 399,584 KRW 499,013
        20% OFF
        20% OFF
        KRW 499,013 KRW 399,584
      • CEI 10:15
        11h 5m
        1 stop
        USM 21:20
        Chiang Rai - Koh Samui | Wed, Dec 10 | Thai Lion Air
        USM 07:00
        11h 35m
        1 stop
        CEI 18:35
        Koh Samui - Chiang Rai | Wed, Dec 17 | Bangkok Airways
        KRW 411,863 KRW 499,013
        17% OFF
        17% OFF
        KRW 499,013 KRW 411,863
      • CEI 08:40
        22h 30m
        1 stop
        USM 07:10
        Chiang Rai - Koh Samui | Tue, Jan 20 | Thai AirAsia
        USM 06:45
        9h 10m
        1 stop
        CEI 15:55
        Koh Samui - Chiang Rai | Fri, Jan 23 | Bangkok Airways
        KRW 415,401 KRW 499,013
        17% OFF
        17% OFF
        KRW 499,013 KRW 415,401
      • CEI 08:40
        11h 5m
        1 stop
        USM 19:45
        Chiang Rai - Koh Samui | Fri, Jan 23 | Thai AirAsia
        USM 07:00
        8h 35m
        1 stop
        CEI 15:35
        Koh Samui - Chiang Rai | Thu, Jan 29 | Bangkok Airways
        KRW 416,234
        17% OFF
        KRW 499,013 KRW 416,234
      • CEI 10:00
        21h 45m
        1 stop
        USM 07:45
        Chiang Rai - Koh Samui | Sun, Jan 11 | Nokair
        USM 07:00
        11h 45m
        1 stop
        CEI 18:45
        Koh Samui - Chiang Rai | Sun, Jan 18 | Bangkok Airways
        KRW 428,512
        14% OFF
        KRW 499,013 KRW 428,512
      • CEI 21:15
        9h 55m
        1 stop
        USM 07:10
        Chiang Rai - Koh Samui | Fri, Dec 12 | Thai AirAsia
        USM 07:15
        13h 30m
        1 stop
        CEI 20:45
        Koh Samui - Chiang Rai | Mon, Dec 15 | Bangkok Airways
        KRW 428,929
        14% OFF
        KRW 499,013 KRW 428,929
      • CEI 10:15
        21h 30m
        1 stop
        USM 07:45
        Chiang Rai - Koh Samui | Sun, Jan 11 | Thai Lion Air
        USM 07:00
        12h 50m
        1 stop
        CEI 19:50
        Koh Samui - Chiang Rai | Sun, Jan 18 | Bangkok Airways
        KRW 437,253
        12% OFF
        KRW 499,013 KRW 437,253
      • CEI 10:00
        21h 10m
        1 stop
        USM 07:10
        Chiang Rai - Koh Samui | Fri, Dec 12 | Nokair
        USM 07:15
        11h 30m
        1 stop
        CEI 18:45
        Koh Samui - Chiang Rai | Mon, Dec 15 | Bangkok Airways
        KRW 438,918
        12% OFF
        KRW 499,013 KRW 438,918
      • CEI 10:15
        20h 55m
        1 stop
        USM 07:10
        Chiang Rai - Koh Samui | Tue, Jan 20 | Thai Lion Air
        USM 06:45
        13h 5m
        1 stop
        CEI 19:50
        Koh Samui - Chiang Rai | Fri, Jan 23 | Bangkok Airways
        KRW 440,999
        12% OFF
        KRW 499,013 KRW 440,999
      • CEI 10:15
        20h 55m
        1 stop
        USM 07:10
        Chiang Rai - Koh Samui | Fri, Dec 12 | Thai Lion Air
        USM 07:15
        12h 35m
        1 stop
        CEI 19:50
        Koh Samui - Chiang Rai | Mon, Dec 15 | Bangkok Airways
        KRW 444,121
        11% OFF
        KRW 499,013 KRW 444,121
      • CEI 13:00
        17h 25m
        1 stop
        USM Invalid Date
        Chiang Rai - Koh Samui | Fri, Dec 12 | Normal Airline
        USM 15:00
        6h
        Direct
        CEI 16:00
        Koh Samui - Chiang Rai | Sun, Dec 14 | Normal Airline
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Displayed flight fares from Chiang Rai to Koh Samui are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight details for Chiang Rai to Koh Samui

The distance between Chiang Rai and Koh Samui is 1,156.8km. Based on Trip.com's data, travel demand peaks in July. The off-season for travel is September.

Cheapest one-way flight priceKRW 156,088
Cheapest return ticket priceKRW 399,584
Off-season travel monthSeptember
Peak season for travelJuly
Flight distance1,156.8km

Find the best time to fly from Chiang Rai to Koh Samui

The cheapest time for Chiang Rai to Koh Samui flights: Jan 18 to Jan 25 — one way flight prices from KRW 156,087.

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 Chiang Rai to Koh Samui, calculated over the upcoming 10 weeks.

Flight FAQs

  • Which airlines offer the cheapest flights from Chiang Rai (CEI) to Koh Samui (USM)?

    Based on Trip.com data, Thai AirAsia offers one-way fares as low as KRW 156,088 on Cheapest nonstop routes (e.g. CEI to USM on Fri, Jan 23), while Thai AirAsia offers Cheapest nonstop round-trips from KRW 399,584 departing on Wed, Dec 10 and returning on Wed, Dec 17.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Chiang Rai 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.
  • To find best deals on flights from Chiang Rai 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 Fri, Jan 23, with one-way flights priced at just KRW 156,088.
    · 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.
  • The cheapest months to fly from Chiang Rai to Koh Samui is September, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Chiang Rai to Koh Samui on December 10, 2025 with Thai AirAsia, with prices starting at KRW 399,583.
  • The time difference between Koh Samui and Chiang Rai 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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