KohSamui to ChiangRai Flights from HKD 114 incl. tax

Based on HopeGoo data, Bangkok Airways offers one-way fares as low as US$119 on Cheapest nonstop routes (e.g. USM to CEI on Wed, Apr 1), while Bangkok Airways offers Cheapest nonstop round-trips from US$347 departing on Fri, Mar 20 and returning on Mon, Mar 23.

At the moment, you can catch a nonstop flight from Koh Samui to Chiang Rai with the following airlines, including: Bangkok Airways Selected airlines are based on historical data collected from flight bookings users made on HopeGoo within the last 90 days.

By analyzing data from all airlines on the HopeGoo flight calendar, it looks like the best time to book a flight from Koh Samui to Chiang Rai 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 Koh Samui to Chiang Rai, you can use various tools on HopeGoo: · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Wed, Apr 1, with one-way flights priced at just US$119. · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Bangkok Airways. · Set up price alerts to easily monitor ticket prices without having to check every day. · Check HopeGoo flight deals and promo codes frequently. · Avoid peak season unless you book very early. It seems the peak season for Chiang Rai travel is around January. · Get exclusive promo codes for HopeGoo app users.

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

After crunching the numbers on our February flight calendar, it's currently cheapest to fly from Koh Samui to Chiang Rai on February 26, 2026 with Bangkok Airways, with prices starting at US$173.

You can land at any one of the following hubs in Chiang Rai, with Samui Airport to Chiang Rai International Airport (USM-CEI) is by far the most common option on this route: Chiang Rai International Airport (CEI).

The time difference between Chiang Rai and Koh Samui is 0h.

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 HopeGoo, 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.