Cheap Flights to Koh Samui in 2026
Economy flights to Koh Samui typically range from $300 to $1,400 round-trip, depending on your departure city and travel dates. Top carriers serving this route include Thai Airways, EVA Air, Cathay Pacific. The best months to find cheap fares are generally outside the peak season (December to February (peak winter escape) and July to August).
Price Overview from Major US Cities
New York → USM
A good deal is under $900 roundtrip. Standard fare is $1,200–$1,800+.
22 hr+ (2 Stops minimum)View Route
Los Angeles → USM
A good deal is under $900 roundtrip. Standard fare is $1,200-$1,600+.
20-24 hr (2 Stops typical, e.g. LAX → Bangkok BKK → USM)View Route
Chicago → USM
A good deal is under $900 roundtrip. Standard fare is $1,300+.
20 hr 30 min (2 Stops typical)View Route
Miami → USM
A good deal is under $900 roundtrip. Standard fare is $1,300+.
22 hr (2+ Stops)View Route
San Francisco → USM
A good deal is under $900 roundtrip. Standard fare is $1,200–$1,800+.
22 hr - 30 hr+ (2+ Stops)View Route
Boston → USM
A good deal is under $900 roundtrip. Standard fare is $1,300–$1,800+.
22 hr 30 min (2+ Stops)View Route
Seattle → USM
A good deal is under $900 roundtrip. Standard fare is $1,300–$1,800+.
22 hr 30 min (2+ Stops)View Route
Denver → USM
A good deal is under $900 roundtrip. Standard fare is $1,300+.
22 hr (2+ Stops)View Route
Washington D.C. → USM
A good deal is under $900 roundtrip. Standard fare is $1,300+.
22 hr 30 min (2+ Stops)View Route
Dallas → USM
A good deal is under $900 roundtrip. Standard fare is $1,300+.
22 hr (2+ Stops)View Route
Atlanta → USM
A good deal is under $900 roundtrip. Standard fare is $1,200–$1,800+.
22 hr+ (2+ Stops)View Route
Houston → USM
A good deal is under $900 roundtrip. Standard fare is $1,300+.
22 hr (2+ Stops)View Route
Top Airlines Flying to Koh Samui
Best Time to Book
For international flights to Koh Samui, airlines generally release their best economy fares 2-6 months prior to departure. Peak pricing usually occurs during December to February (peak winter escape) and July to August. If your dates are flexible, avoiding these peak periods will yield the cheapest flights.
Koh Samui Quick Guide
Best Months to Visit
January to April
Currency
Thai Baht (฿)
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