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Generally we should transit through Bangkok airport and cheap fare available from Chennai, Bangalore, Hyderabad, Kolkata, and Delhi & Mumbai .15 days VISA On ARRIVAL facility is available for 19 countries (Including India) and documents required are
PP with 2 blank pages and 6 month validity, Return air ticket, Hotel receipt details during stay,2 Photographs (Check Thailand visa photo)Carry 10000 Thai baht as cash (1 Thai Baht is 2.35 INR during the trip) per person or 20000 Thai Baht for family.
Ideal place to stay is near Patong beach. It cost me 1500 INR/day including complimentary breakfast (American style). For vegetarian food lot of restaurants are available in Patong. Bikes are available for rent at Patong, though I did not try that. We may easily transit to Pattaya from Phuket where you can enjoy nightlife of Thailand.