Koh Samui public transport

Koh Samui has no bus, no train and no commuter ferry. You need your own wheels. A scooter rents for THB 2,500–4,000 a month ($76–122) as of April 2026, and a used one costs THB 25,000–45,000 ($760–1,368). Songthaews run in daylight and thin out after dark. Taxis rarely use meters, so agree the fare first.

Current at 9 September 2026. Dollars at THB 32.9 to US$1, the rate of 8 September 2026.

The island has one road and no timetable

Route 4169 rings Koh Samui for 51 kilometres, with a spur out to Choeng Mon. The island covers 228.7 km², Thailand's second largest. Everything you do after moving to Koh Samui happens on that road. There is no rail, no metro, no scheduled bus and no commuter ferry. That is the whole picture. It does not improve after dark.

The nearest thing to a bus is the songthaew, a converted pickup with bench seats. Yellow trucks run clockwise and red ones anticlockwise. They work daylight hours and frequency drops sharply after dark. There is no fixed fare list and no published timetable. The driver prices by route, time, load and how new you look.

Prices from insidesamui.com's songthaew guide, 12 June 2026. Bring cash. No songthaew takes a card.

A 3 km airport run costs THB 180–250 on Grab

Grab works island-wide through the app, with pinned pickup and an official Samui Airport transfer. Coverage is good in Chaweng, Bophut and around the airport, thinner elsewhere, and waits stretch longer late at night. Bolt is also named as an app locals use. Grab's own transport page names Samui as a served province, separate from Surat Thani. Bolt's city list does not mention Samui at all (grab.com; bolt.eu, undated pages, read 11 September 2026). Expect refusals near the taxi ranks at the airport and the Chaweng piers.

The airport transfer is the one Grab price anyone publishes: THB 180–250 fixed ($5.47–7.60) for the 3 km from Chaweng (grab.com Samui airport rides; insidesamui.com, 15 June 2026). A songthaew driver quotes a tourist THB 200–400 for the same ride.

Ten kilometres is where published tariffs run out. Grab quotes no per-kilometre fare for Samui, only the fixed airport route above, and Bolt does not serve the island at all (grab.com; bolt.eu, undated pages, read 11 September 2026). The nearest sourced comparator is a different trip: the airport's own transfer desk charges THB 400–800 depending on destination (mykeythai.com; thingstodoinsamui.com). A Chaweng-to-Bophut songthaew's fair target for that 10 km stays THB 60–80.

Taxis are metered by law and metered almost never

Samui taxis are yellow or maroon saloons with a yellow-and-green roof sign. They seldom run the meter, though the meter is a legal requirement. The district said so plainly after a May 2026 crackdown, and threatened licence suspensions and plate revocations. Separately, more than 40 drivers were fined for overcharging and meter violations in the New Year 2025–26 push, a tally reported 28 December 2025 (khaosodenglish.com).

What triggered that crackdown was not a fare dispute. A taxi driver was shot dead in late May 2026, in a killing police linked to a local gang. On 28 May 2026 authorities moved against taxi queue groups accused of blocking rivals (thaiexaminer.com, 29 May 2026).

Agree the fare before you get in, or use the app.

You need a licence, and the wrong one voids your insurance

Thailand recognises the 1949 Geneva and 1968 Vienna conventions. A home licence plus a matching International Driving Permit works for a visitor. The IDP must carry the motorcycle category. A car-only IDP does not cover a 125cc scooter, and police and insurers will both treat you as unlicensed.

That is where the money is. A rental scooter carries only compulsory cover. It pays THB 30,000 to 80,000 of medical costs ($912–2,432) and nothing else. No insurer covers damage to the rental scooter itself. Travel policies routinely void a claim if you were riding without a licence valid for that class. Riding unlicensed is a THB 500–1,000 fine ($15–30) with the bike impounded, and no helmet is THB 2,000 ($61). The fines are small. The hospital bill is not.

A Thai licence reportedly takes two days here, at about THB 330 of government fees for car and motorcycle together. That comes from one undated guide and nothing corroborates it. CHECK Who qualifies matters more. The national rule wants a non-immigrant visa, a work permit or permanent residence, and excludes tourist entries. No source states which categories the Samui office accepts, and Thailand DTV visa holders are a documented grey area nationwide. CHECK Ask the Samui land transport office directly before you plan around it. The national position sits on the Thai driving licence rules page.

Koh Samui, honestly walks that route in order: certificate of residence, medical certificate at about THB 250 ($7.60), traffic course, then the office.

Buying a scooter beats renting one after eleven months

A scooter rents for THB 150–350 a day ($4.56–10.64), or THB 2,500–4,000 a month long term. A second-hand one costs THB 25,000–45,000 (insidesamui.com, April 2026). Take the middle of both ranges and buying pays for itself in about eleven months — a gross payback on the purchase price, before insurance, servicing and the registration transfer. An economy car is roughly THB 1,000 a day ($30), or THB 12,000–20,000 a month ($365–608). A private driver runs THB 500–800 an hour, or THB 3,000–5,000 for eight to ten hours with fuel and an air-conditioned car (mykeythai.com, October 2025). Driving times set the ceiling on all this. Chaweng to Lamai and to Bophut both run 15–20 minutes; the airport to Lamai takes 20–25, and the east coast to Nathon 30–40 (insidesamui.com, June 2026).

Gasohol 95 was THB 38.29 a litre ($1.16) on 2 September 2026 (nationthailand.com). Numbeo's Samui pump figure of THB 47.64 sits 24% higher, with no explanation. CHECK

Only one place here is walkable

Fisherman's Village in Bophut is the island's most walkable strip. Chaweng is the commercial heart, with four kilometres of beach, the only mall and both cinemas, but it is not built for walking. Maenam has the flattest ground on the island, yet scooter or car stays essential there too. Everywhere else you drive. Choeng Mon has few independent restaurants, so dinner is a drive on unlit roads.

The ring road is fast, narrow in places and unlit outside the towns. The hillside spurs are steep, and wet for a quarter of the year. Your area decides how much of that you ride, so read where people actually live on Samui beside this page.

Getting off the island is the cost that never goes away

Bangkok Airways built Samui Airport, owns it, and flies the only nonstop from Bangkok. One way runs THB 2,795–8,000 ($85–243). The cheaper route is Surat Thani from about THB 1,000 ($30), then a van and a ferry at THB 80–200 ($2.43–6.08). Vietjet has sold that as one booking since 28 April 2026, from THB 1,100 ($33).

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