HKG to USM, Hong Kong International Airport to Samui Airport Cheap Flights

Based on HopeGoo data, Thai Lion Air offers one-way fares as low as US$165 on Cheapest nonstop routes (e.g. HKG to USM on Sat, Mar 7), while Thai Lion Air offers Cheapest nonstop round-trips from US$404 departing on Fri, Mar 27 and returning on Tue, Mar 31.

At the moment, you can catch a nonstop flight from Hong Kong to Koh Samui with the following airlines, including: Bangkok Airways Hong Kong Airlines Cathay Pacific Thai Airways HK Express Selected airlines are based on historical data collected from flight bookings users made on HopeGoo within the last 90 days.

It takes about 3 hours 26 minutes to fly from Hong Kong to Koh Samui.

By analyzing data from all airlines on the HopeGoo flight calendar, it looks like the best time to book a flight from Hong Kong 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.

Based on HopeGoo data in the past 4 weeks, there is 21 flight per week flying from Hong Kong to Koh Samui. You can check the weekly schedule for popular airlines on this route below: Cathay Pacific: S/M/T/W/T/F/S -- CX6503 (17:37) Hong Kong Airlines: S/M/T/W/T/F/S -- HX3752 (17:37)

To find best deals on flights from Hong Kong to Koh Samui, 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 Sat, Mar 7, with one-way flights priced at just US$165. · 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 Koh Samui travel is around July. · Get exclusive promo codes for HopeGoo app users.

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

After crunching the numbers on our February flight calendar, it's currently cheapest to fly from Hong Kong to Koh Samui on February 6, 2026 with HK Express, with prices starting at US$389.

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

The time difference between Koh Samui and Hong Kong is 1h.

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.