Earn point on your loyalty program!arrow arc left

Cheap flights from St Louis (STL) to Chiang Mai (CNX)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from St Louis (STL) to Chiang Mai (CNX)

How to find the cheapest flight from St Louis (STL) to Chiang Mai (CNX)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Chiang Mai (CNX)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Chiang Mai (CNX)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from St Louis to Chiang Mai in July , August 2026

28 Jul - 26 Aug $ 1,498.00
STL
St Louis
Frontier Airlines
2 STOPS
CNX
Chiang Mai
CNX
Chiang Mai
Frontier Airlines
3 STOPS
STL
St Louis
Pick dates
28 Jul - 19 Aug $ 1,506.00
STL
St Louis
Frontier Airlines
2 STOPS
CNX
Chiang Mai
CNX
Chiang Mai
Frontier Airlines
3 STOPS
STL
St Louis
Pick dates
28 Jul - 23 Aug $ 1,518.00
STL
St Louis
Frontier Airlines
2 STOPS
CNX
Chiang Mai
CNX
Chiang Mai
Frontier Airlines
3 STOPS
STL
St Louis
Pick dates

Last minute flights from St Louis to Chiang Mai

28 Jul - 01 Aug $ 1,977.00
STL
St Louis
Frontier Airlines
2 STOPS
CNX
Chiang Mai
CNX
Chiang Mai
Frontier Airlines
3 STOPS
STL
St Louis
Pick dates
26 Jul - 01 Aug $ 2,045.00
STL
St Louis
Frontier Airlines
3 STOPS
CNX
Chiang Mai
CNX
Chiang Mai
Frontier Airlines
3 STOPS
STL
St Louis
Pick dates
26 Jul - 01 Aug $ 2,061.00
STL
St Louis
Frontier Airlines
3 STOPS
CNX
Chiang Mai
CNX
Chiang Mai
Frontier Airlines
3 STOPS
STL
St Louis
Pick dates

One-way flights to Chiang Mai from St Louis

3:41 PM - 7:40 AM
EVA Air
2 Stops
30h 44m
STL - CNX
$ 791
Kiwi
Pick dates
3:41 PM - 8:05 PM
Thai Vietjet
3 Stops
41h 49m
STL - CNX
$ 793
Kiwi
Pick dates
3:41 PM - 7:40 AM
EVA Air
2 Stops
30h 44m
STL - CNX
$ 865
Kiwi
Pick dates

How to find the cheapest flight from St Louis (STL) to Chiang Mai (CNX)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Chiang Mai (CNX)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Chiang Mai (CNX)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.