Surat Thani / Ko Samui Airport (USM) — Direct Flights, Airlines

Koh Samui Airport (USM, ICAO VTSM) is in Surat Thani / Ko Samui, Thailand. It is the based hub of Bangkok Airways and Thai Smile. In the SiamFlights catalogue, USM is served by 2 airlines across 1 route (0 outbound, 1 inbound).

Airport at a glance

Our catalogue records 0 outbound and 1 inbound corridors at Koh Samui Airport (USM / ICAO VTSM), serving Surat Thani / Ko Samui, Thailand, across 2 carriers with 2 of them based here. Time zone Asia/Bangkok. Frequency across the corridors touching this field totals about 35 departures a week.

Coordinates are for checking, not decoration. USM sits at 9.54779, 100.062. That is genuinely useful when booking a room or a transfer, because “near the airport” is claimed to wildly different standards. In a large city, map distance and real travel time in peak hours diverge sharply — read the travel time for the hour you will actually move, not the kilometre figure.

IATA and ICAO are used in different places. The three-letter USM is the IATA code that appears on tickets, bag tags and search screens; VTSM is the four-letter ICAO code used in flight plans, notices to airmen and operational paperwork. IATA codes can collide for historical reasons; ICAO codes do not, and their first letters encode the region. A four-letter code in aviation documentation is not an error — it is a different system.

Airlines serving USM

2 carriers appear at USM in our catalogue and we hold an airline row for 1 of them, with baseline baggage spanning 20 to 20 kg. None of the rows we hold sits in a major alliance. 2 of them are based here.

“Serves” is not “flies daily”. This list covers every carrier appearing on a corridor into or out of USM in our catalogue. Some fly seasonally, some a few times a week, and some sell as the marketing carrier on a partner’s aircraft. The number that matters to your plan is how many actually quote your dates — usually fewer than the full list.

Carriers we hold no row for. Thai Smile appear at this airport in our catalogue but have no alliance or baggage record in our database, so we print a dash instead of guessing. Check those carriers’ own pages before buying — an empty cell is more honest than an unsourced number.

USM route overview

USM has 0 outbound corridors in our catalogue, roughly 0 departures a week All figures are estimates of the standard schedule. 1 of those corridors carry a cached fare, the lowest ฿5,277. The field runs on Asia/Bangkok, ICAO VTSM. The corridors touching this field connect 1 country in our catalogue.

Inbound

Outbound and inbound are asymmetric because this is a catalogue boundary. We record 0 outbound and 1 inbound corridors for USM. The gap reflects which route guides we chose to build — weighted to what travellers from Thailand search — not one-way service. The return flights exist whether or not we have published a page for them yet.

This field sits in our catalogue as a destination. We record 1 inbound corridors into it, splitting 1 short-haul (<4h), and no outbound guides — we build route pages only for journeys starting in Thailand. Departures from here exist; they simply have no page in this set yet. Read the carrier’s own schedule for the return.

Corridors & fares from USM

The 1 corridor at USM break down as 1 short-haul (<4h), serving mainly ASEAN & regional leisure. We hold a cached fare for 1 of 1 route, the lowest ฿5,277 on BKK–USM. The corridors touching this field connect 1 country in our catalogue.

Most USM corridors here serve ASEAN & regional leisure travellers. The mix is 1 short hop (under 4 h). Fares are shown in Thai baht (THB), and each route guide below carries live cached prices.

Why some rows have no price. We capture lows in passes, and not every corridor returns a value each time. Seasonal routes, thin routes and routes sold through narrow channels report irregularly. An empty cell means no capture succeeded in the latest pass — not that the route is closed or expensive. We leave it blank rather than interpolate, because plausible-looking estimates are exactly what makes a table untrustworthy.

Everything is shown in baht, and that matters more than it looks. Fares are converted to THB so they compare on one page, but the underlying prices are set in the currency of the market that issues the ticket. The same corridor can price differently issued in different countries, and the exchange rate moves between our capture passes. Read these as a ranking, not as accounting figures.

Direct flights to USM — 1 route

Our catalogue records 1 inbound corridors into USM from 1 country, block times 1.2 to 1.2 hours. Frequency figures are estimates combining every carrier on the corridor. 2 carriers appear at USM, 2 of them based at the field. Frequency across the corridors touching this field totals about 35 departures a week.

• BKK → USM — 35×/wk, 1.2 h, low ฿5,277

The destination country sets the rules, not the departure airport. The corridors here span 1 country, each with its own aviation regulator, visa regime and transit conditions. What you are owed changes with the destination and the direction of travel, not with the airport you left from. The route guides carry the detail per corridor.

How to read this list usefully. The frequency figure describes the risk in your plan, not the quality of the route: several departures a day gives you options when something breaks, a few a week means building in a spare day. We hold a cached fare on 1 of the 1 corridor here; the rest have no successful capture yet, which does not mean they cost more.

Time zone and connecting at USM

Our catalogue records 0 outbound and 1 inbound corridors here. USM runs on Asia/Bangkok, the same as Bangkok. The gap is constant year-round. Every time printed on a boarding pass is local to that airport rather than an elapsed duration, so subtracting one from the other gives you the wrong number.

Minimum connection time is not in our data. Every airport publishes one, and the figure differs for domestic-to-domestic, international-to-international and terminal-change connections. A booking system will not sell you less than that on a single ticket — but it will happily let you build less than that yourself across two tickets. That is where passengers most often create risk without realising it.

International-to-domestic is a full re-entry. At most airports that connection means clearing immigration, reclaiming the bag for customs, then checking in and passing security again — even on a single ticket. It takes materially longer than an international-to-international transfer. Plan around the actual steps rather than the gap printed on the itinerary.

FAQ

Where is USM airport located?

USM (ICAO VTSM) is in Surat Thani / Ko Samui, Thailand.

Which airlines serve USM?

2 airlines serve USM, including Bangkok Airways and Thai Smile. Compare baggage and alliances in the table above.

How many routes run from/to USM?

The SiamFlights catalogue lists 0 outbound and 1 inbound routes for USM.

Is USM an airline hub?

USM is a primary hub for Bangkok Airways and Thai Smile.

What is the difference between USM and VTSM?

USM is the three-letter IATA code used on tickets and bag tags; VTSM is the four-letter ICAO code used in flight plans and operational documents. They are different systems, not an inconsistency.

How far is USM from Bangkok time?

USM runs on Asia/Bangkok, the same as Bangkok. It does not change clocks seasonally, so the gap is constant.

Why do some USM corridors show no fare?

Because no capture succeeded in the latest pass of our cache. Seasonal and low-frequency corridors report irregularly. A blank is not a closed route or an expensive one.

Related

• BKK → USM