Ten days is the sweet spot for a first trip to Thailand. It's enough to see all three of the country's headline regions — Bangkok, the northern mountains around Chiang Mai, and the southern islands — without the forced march that a shorter trip becomes. This is the classic first-timer route, and it works because each leg is a short domestic flight from the last.
One housekeeping note before you book: Thailand's visa-free rules for U.S. passport holders have been changing in 2026, and the permitted length of a visa-exempt stay has been in flux. Ten days sits comfortably inside any version of the rule, so this trip is unaffected — but confirm the current entry requirements for your travel date, and file your free Thailand Digital Arrival Card (TDAC) online before you fly.
Days 1–3: Bangkok
Most flights from the U.S. connect through East Asia or the Middle East and land at Suvarnabhumi (BKK) late, so treat Day 1 as arrival and recovery — you're 11–12 hours ahead of the U.S. East Coast. Base yourself in Sukhumvit for the easiest first-timer experience (it's on the BTS Skytrain) or the Riverside / Old Town if you want to be among the temples.
Spend Day 2 on the temple core: the Grand Palace and Wat Pho in the morning (shoulders and knees covered), then Wat Arun across the river at sunset, capped by a Chinatown street-food crawl. On Day 3, hit Chatuchak Weekend Market if it's a weekend (or the Jim Thompson House midweek), and consider a half-day cooking class or canal boat ride before you fly north.
Days 4–6: Chiang Mai and the north
Fly to Chiang Mai (CNX) on the morning of Day 4 — about 1 hour 15 minutes. The pace up north is gentler than Bangkok's, and the city is walkable. Spend the afternoon on the Old City temples (Wat Chedi Luang, Wat Phra Singh) and the evening at a night market.
Day 5 is for the mountain temple Wat Phra That Doi Suthep, which overlooks the city, paired with a Thai cooking class — Chiang Mai is one of the best places in the country to take one. Reserve Day 6 for an ethical elephant sanctuary: the observation-only kind where you don't ride the animals. Book a reputable one in advance; it's usually a full day including transport.
Days 7–9: the southern islands
On Day 7, fly south — Chiang Mai connects to Phuket (HKT) and Krabi (KBV) directly or via Bangkok. For this itinerary, Krabi is the easier, calmer landing; Phuket if you want more nightlife and resorts. Check in and spend the afternoon decompressing on the beach.
Day 8 is your big island-hopping day: a longtail or speedboat trip to the Phi Phi Islands, Phang Nga Bay, or the Hong Islands lagoons. Go early to beat the crowds. Day 9 is yours to do nothing in particular — a quiet beach, a snorkeling trip, a massage, a sunset longtail to a hidden cove.