U-Tapao International Airport (UTP) serves Rayong; Chiang Mai International Airport (CNX) serves Chiang Mai.
The airports are 442 miles apart by great-circle distance.
Roame's current schedule feed shows nonstop service from UTP to CNX.
Airlines represented in the current schedule are Thai Lion Air (SL).
Published schedule dates span Sep 10, 2026 – Aug 1, 2027.