Chiang Mai (CNX) → Ko Samui (USM)
A reference for the Chiang Mai International Airport to Samui Airport route. You'll find the operators on file, the great-circle geometry, the connecting options if no nonstop fits your dates, and a short profile of each endpoint airport.
The flight from Chiang Mai (CNX) to Ko Samui (USM) covers a great-circle distance of roughly 1,032 km (641 miles). Aircraft leave Chiang Mai International Airport on an initial south heading. As domestic sectors go, this one sits in the medium-haul bracket: long enough that most carriers run it as its own dedicated rotation, but short enough to fit inside a single crew duty period.
Bangkok Airways is the only carrier filing a scheduled CNX to USM service in the dataset. Single-operator routes like this usually reflect a focus-city or hub-spoke relationship, or a market that's big enough to support one dedicated daily but not big enough to attract a second entrant yet.
Operators on the CNX → USM direction
Carriers with at least one scheduled rotation on this sector in the OpenFlights dataset, ranked by the number of code-shared filings.
A medium-haul sector of this length is an operational sweet spot. Block time lands near 1h 57m, well inside a single crew duty for most carriers, and modern narrow-bodies (A320neo, 737 MAX, A321) can fly it without payload restrictions. Premium-cabin product on this kind of sector is usually a recliner seat rather than a fully flat bed.
If a nonstop doesn't match your dates, Singapore (SIN), Hong Kong (HKG), and Bangkok (BKK) show up on both ends of the network and make the most natural connecting points. The connecting-hubs grid below extends that list to the eight strongest options, ranked by each airport's overall departure activity. That ranking is a fast proxy for how many onward flights a single stop is likely to feed.
Connecting hubs
Airports that already appear on both ends of this network. They're the natural one-stop options when no nonstop matches your dates, ranked by overall departure activity.
Both endpoints sit inside Thailand, so this is a domestic sector subject to local rules on baggage, identification, and security. Domestic flying often gets different tax treatment than international itineraries, so when you compare fares look at the all-in price (with domestic departure taxes included) rather than the base fare alone. See the Thailand routes index for other domestic pairs.
On the day of operation, the CNX to USM direction lifts off heading south, then the great-circle track curves to compensate for the Earth's rotation. The return USM to CNX sector heads north out of the gate, with 1 operators on file for the inbound side. Combine the two operator lists for a full picture of the city pair's competitive landscape.
Endpoints
Other routes from Chiang Mai (CNX)
Other destinations served from the same origin. Handy for combining trips or for finding an alternate first leg.
Other routes into Ko Samui (USM)
Other origins that already file scheduled service into the destination airport.
Reading this route page
The operator list reflects scheduled-route filings in the OpenFlights dataset, not real-time availability. A carrier appearing here publishes a scheduled service on this sector. It isn't a live timetable, and the actual flight numbers, frequencies, and aircraft types shift season to season. For booking and current schedules, cross-reference the airline page above with the carrier's own website.
Distance here is the great-circle arc between the two airports' published coordinates. Real flight tracks wander off that line because of wind, ATC routings, oceanic crossings, and political airspace constraints. Block time is an estimate covering ground taxi, climb, cruise at typical jet speeds, and descent. Real block times shift with aircraft type, weather, and traffic, so treat the stat-strip number as a planning indicator rather than a published flight time.