$253 Cheap Thai Airways International flights Penang (PEN) to Samui Intl. Airport (USM)

Landing cheap one-way Thai Airways International flights from PEN to USM from $253 on Expedia couldn't be easier — just filter by "Price (lowest to highest)." Or check out our budget-friendly round-trip fares from $450 for your next getaway.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Check for Thai Airways International flights from PEN to USM about one month before you want to go. The most affordable time to book an international flight is generally 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. No matter your fare class or itinerary, the best day of the week to book international airfare is usually Sunday. Friday is often the most expensive. Travelers booking on a Sunday can save an average of 17% compared to those who book on a Friday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.

Browse Thai Airways International's earliest flights from PEN to USM by selecting our "Morning" and "Early Morning" filters. Not only will you arrive at your destination sooner, early departures also experience 20% fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.

Journey from PEN to USM with Thai Airways International and enjoy a host of benefits including top-tier customer service. When booking through Expedia as a Thai Royal Orchid Plus and One Key™ member, you can also earn OneKeyCash™* to redeem on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.