A taxi from Phuket International Airport (HKT) to Yacht Haven Marina takes about 30 minutes and costs around THB 500 to 800 (about $15 to $25). Taxis run 24/7 from the stand outside arrivals. If you're flying into Bangkok (BKK), take a domestic flight to Phuket, about 1 hour 25 minutes and THB 1,000 to 2,500 ($30 to $75) depending on the airline, then a taxi from there.
