AirHint found the following cheapest return flights from St. Louis (STL) to Chiang Mai (CNX) in July 2025 (see full year).
Return flights
| 28 Jul - 12 Aug | Alaska Airlines |
Also check the deals for one-way flights from St. Louis to Chiang Mai in July.
The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
Find us on social media