Most visitors ask this question too late, after the flights are booked. The honest answer depends on how much you want to see and how much transit time you can stomach. Thailand is long (Bangkok to Phuket is about 850 km), the best beaches sit far from the best temples, and each hop between regions costs half a day. This guide gives a recommended trip length, a days-per-destination table and a direct route to the itinerary that fits your dates.
The short answer
Plan 10 to 14 days. That gives you Bangkok, Chiang Mai and one island group at an unhurried pace, with a rest day or two built in. Seven days is the minimum worth the long-haul flight, provided you limit yourself to Bangkok plus one other region. Past three weeks, Thailand rewards slow travel: more islands, the Mekong border towns, Isaan and the far north.
How many days in each destination
| Destination | Days | Why |
|---|---|---|
| Bangkok | 2-3 | Grand Palace, Wat Pho, Wat Arun, river and markets; a fourth day for a day trip |
| Chiang Mai | 3 | Old City temples, Doi Suthep, cooking class, an ethical elephant sanctuary visit |
| Ayutthaya or Kanchanaburi | 1 | Day trips from Bangkok, no need to change hotels |
| Chiang Rai | 1-2 | White Temple, Blue Temple and the hill country; usually a side trip from Chiang Mai |
| Pai | 2-3 | Slow mountain base; the road from Chiang Mai is famously winding |
| Phuket and Krabi | 4-5 | Beaches, Phang Nga Bay, Railay; best on the Andaman coast from November to April |
| Koh Samui, Koh Phangan, Koh Tao | 4-5 | Gulf islands; a good fallback when the Andaman side is rainy |
| Khao Sok | 2 | Lake stays among limestone cliffs, a natural stopover between coasts |
Add a day for every internal flight, because airport time, baggage and check-in easily eat the morning. Our getting around Thailand guide covers flights, trains and ferries in more detail.
Which itinerary fits your trip length
| Your time | Best match | What it covers |
|---|---|---|
| 3 days | 3 days in Bangkok | Layover or add-on city stay |
| 7 days, one region | One week in northern Thailand | Chiang Mai, Chiang Rai and the hills |
| 7 days, beaches | One week in southern Thailand | Islands and the Andaman coast |
| 7 days, mixed | One week in Thailand | Bangkok, Chiang Mai and an island, linked by two flights |
| 10 days | 10 days in Thailand | The classic Bangkok, north, beach route |
| 10 days, beaches only | Thailand island hopping | Several islands in the south |
| 14 days | Two weeks in Thailand | Bangkok, Chiang Mai and two island groups |
| 21 days | Three weeks in Thailand | All the above plus the slower extras |
Travelling with children or on a honeymoon? Our family itinerary and honeymoon itinerary adjust the pace. On a tight budget, see the budget Thailand itinerary.
How to choose: by trip type
7 days: pick one region. Bangkok and the north is the cultural week. Bangkok and an island is the beach week. The two do not combine well in seven days, because moving between the north and the beaches costs most of a day.
10 to 14 days: the classic. Three nights in Bangkok, three in Chiang Mai, then four to five on an island is the route most first-timers book, and it is the reason we recommend this length. It leaves a margin for a delayed flight or a wet day.
3 weeks or more: you can cover both coasts, add Khao Sok, Ayutthaya and Sukhothai, and still have rest days. Note that a 30-day visa exemption covers all of it with room to spare.
Season changes the answer
Weather can shift how long you want to spend where. From November to February the whole country is at its best and the north is cool. The Andaman coast (Phuket, Krabi, Koh Lanta) turns rough from roughly May to October, when the Gulf islands of Samui, Phangan and Tao are the better beach choice. If you are travelling in the rain, shorten the beach leg and lengthen the culture leg. Our best time to visit Thailand guide has the month-by-month picture.
Visa: you can stay up to 30 days
Most Western passports (UK, US, EU, Australia, Canada, New Zealand) get 30 days visa-free for tourism, which replaced the 60-day scheme on 15 September 2026. That is plenty for any trip in this guide, even the three-week route. Staying longer means a pre-arranged tourist visa or an extension at an immigration office. Entry rules vary by nationality, so confirm yours on the official Thai e-Visa portal and complete the Thailand Digital Arrival Card before flying. Full detail is in our Thailand visa guide.
Mistakes that cost days
- Too many stops. Each change of base costs a half day. Four stops in ten days is the upper limit.
- Booking the return flight first. Leave the final night in Bangkok so a late ferry does not become a missed flight.
- Underestimating the islands. Ferry timetables are seasonal and Koh Tao or Koh Lipe can take most of a day to reach.
- Skipping rest days. Heat and humidity are tiring. Put a pool or spa afternoon after every long transfer.
More first-trip advice is in our first time in Thailand tips. To compare costs by trip length, use the budget guide and our trip cost calculator.
Book the key pieces early
Once you have a length, book flights, Bangkok tours and Chiang Mai tours early for peak months (December to February). Browse flights to Thailand and take out travel insurance before you pay for non-refundable ferries or domestic flights. For planning inspiration, the Tourism Authority of Thailand lists regional highlights at tourismthailand.org.