Arrive at Suvarnabhumi or Don Mueang and take a taxi or Grab to your central hotel to drop bags and freshen up. Traffic can be heavy; allow 45–90 minutes depending on airport and time of day.
Iconic Pad Thai spot near the old town; quick, classic Thai for a reliable first meal (open daily ~5pm–2am for its famous charcoal pad Thai, daytime option: local branch hours vary).
Choose a half-day tour to visit a floating market and ride longtail boats through canals; many operate early mornings and return by early afternoon (Amphawa more active afternoon–evening, Damnoen Saduak best morning).
If you want a memorable, messy meal, try Jay Fai (often long wait) or pick a reputable local seafood restaurant; many close between lunch and dinner — check opening hours.
Quick breakfast at the hotel and taxi to Bangkok airport for your morning flight to Koh Samui; domestic flights take ~1h15m (allow 2 hours for check-in).
Land in Koh Samui, transfer to your beachfront hotel in Chaweng or Bophut and drop luggage; many hotels offer early check-in for a fee or luggage hold.
Book a speedboat or snorkeling day trip to Ang Thong National Marine Park (departures ~8–9 AM, returns late afternoon); expect kayaking, snorkeling, and viewpoint hikes.
Join the legendary Full Moon Party (timing depends on lunar calendar) with DJs, fire shows, and neon paint; if not on a Full Moon date, Haad Rin still hosts large beach parties on other nights.
Stroll the Night Bazaar for souvenirs and street food, then hit Nimmanhaemin or the Old City bars for relaxed nightlife (bazaar generally 6 PM–midnight).
Spend the morning at a reputable sanctuary (e.g., Elephant Nature Park) interacting with rescued elephants; most programs run half to full day and include transport (verify sanctuary hours and book in advance).
Walk around the Old City visiting Wat Chedi Luang and Wat Phra Singh; stop at a trendy coffee shop on Nimman for a break (temples open during daylight hours).
Early breakfast and taxi to Chiang Mai International Airport for your flight to Ho Chi Minh City; direct flights ~1.5–2 hours (allow time for customs/immigration on arrival).
If you have time before your flight, a half-day tour to Cu Chi Tunnels is a memorable military-history experience — tours depart early morning and return by early afternoon (open daily).