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 November , December 2025

24 Nov - 26 Dec $ 1,275.00
STL
St Louis
Frontier Airlines
3 STOPS
CNX
Chiang Mai
CNX
Chiang Mai
Frontier Airlines
3 STOPS
STL
St Louis
Pick dates
24 Nov - 19 Dec $ 1,276.00
STL
St Louis
Frontier Airlines
3 STOPS
CNX
Chiang Mai
CNX
Chiang Mai
Frontier Airlines
3 STOPS
STL
St Louis
Pick dates
25 Nov - 26 Dec $ 1,290.00
STL
St Louis
Frontier Airlines
3 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

24 Nov - 01 Dec $ 1,798.00
STL
St Louis
Alaska Airlines
3 STOPS
CNX
Chiang Mai
CNX
Chiang Mai
Alaska Airlines
3 STOPS
STL
St Louis
Pick dates
25 Nov - 01 Dec $ 1,804.00
STL
St Louis
Alaska Airlines
3 STOPS
CNX
Chiang Mai
CNX
Chiang Mai
Alaska Airlines
3 STOPS
STL
St Louis
Pick dates
24 Nov - 01 Dec $ 1,813.00
STL
St Louis
Korean Air
3 STOPS
CNX
Chiang Mai
CNX
Chiang Mai
Korean Air
3 STOPS
STL
St Louis
Pick dates

One-way flights to Chiang Mai from St Louis

7:00 AM - 6:05 AM
Thai Lion Air
3 Stops
35h 20m
STL - CNX
$ 639
Kiwi
Pick dates
7:00 AM - 6:05 AM
Thai Lion Air
3 Stops
35h 20m
STL - CNX
$ 666
Kiwi
Pick dates
12:09 PM - 7:20 AM
EVA Air
3 Stops
33h 26m
STL - CNX
$ 691
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.