Best places to visit in Thailand: top cities, regions and sights

The list below is ranked for a first or second trip, not for completeness. Each entry gives the minimum nights that does the place justice and the months when its weather usually holds. Use it as a filter: choose one region, then two or three places inside it.

Month decides the coast. The Andaman side (Krabi, Phuket, Koh Lanta, Koh Lipe) runs Nov–Apr; the Gulf side (Samui, Phangan, Tao) runs roughly Feb–Sep. The north is best Nov–Jan and smoky Feb–Apr. If your dates are fixed, let the month choose the coast rather than the other way round.

Passport and budget shape the same decision. Most Western passports get 60 days on arrival, extendable, but rules change — confirm on the official immigration site before booking. Costs vary widely by region: Bangkok and the islands cost the most, Isaan and the far north the least.

Step 1: fix your dates and read the month against the coast table. Step 2: book Bangkok for 3–4 nights at the start, because every other leg routes through it. Step 3: choose one region — north or one coast — and give it 4–6 nights. Step 4: add a short stop that sits on the way, such as Ayutthaya between Bangkok and the north, or Khao Sok between the two coasts. Step 5: book one or two domestic flights rather than overnight buses; a bus night costs you a day of the trip.

A 7-day trip is Bangkok plus one region with one domestic flight. Ten days adds a second stop inside the same region. Fourteen days is the point where the classic loop works: Bangkok, Ayutthaya, Chiang Mai, Chiang Rai, then a flight south to Khao Sok and Krabi or Koh Lanta. Three weeks lets you do history, mountains and both coasts without rushing.

Book domestic flights early for the Nov–Feb and Jul–Aug peaks; seats on Bangkok–Chiang Mai and Bangkok–Krabi sell out around long weekends and Songkran in mid-April. Trains are slower but cheap and scenic on the Bangkok–Ayutthaya–Chiang Mai line.

Do not try to cover Bangkok, the north and a coast in ten days. That plan spends a third of the trip in transit and is the most common way a Thailand trip goes wrong.

Weather is regional, not national. A wet week in Phuket says nothing about Samui, and the reverse is also true. Check the coast you booked, not the country forecast.

Northern Thailand has a smoke season, usually Feb–Apr, when burning pushes air quality down. If you have respiratory issues, shift north trips to Nov–Jan or go south instead.

Islands and the far north have fewer hospital options than Bangkok or Chiang Mai. Travel insurance that covers boat transfers, motorbike injuries and medical evacuation is worth arranging before you leave, not after.

Prices below are 2026 estimates and move with the season; island accommodation can double over Christmas and New Year.