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Cheap flights from St. Louis to Chiang Mai from $542

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Chiang Mai departing on 5/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from St. Louis to Chiang Mai

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:35 am - 10:20 am
STL
-
CNX
37h 45m
2 stops
Multiple Airlines Logo
11:20 am - 10:35 am
CNX
-
STL
35h 15m
2 stops
$1,128Multiple Airlines
Tue, May 5 - Thu, May 14
Multiple Airlines Logo
8:35 am - 10:20 am
STL
-
CNX
37h 45m
2 stops
Multiple Airlines Logo
11:20 am - 10:35 am
CNX
-
STL
35h 15m
2 stops
$1,145Multiple Airlines
Tue, May 5 - Thu, May 14
Multiple Airlines Logo
4:46 pm - 10:25 am
STL
-
CNX
29h 39m
2 stops
Multiple Airlines Logo
11:35 am - 11:59 pm
CNX
-
STL
48h 24m
2 stops
$1,146Multiple Airlines
Tue, Apr 28 - Tue, May 5
Multiple Airlines Logo
11:55 am - 10:20 am
STL
-
CNX
34h 25m
2 stops
Multiple Airlines Logo
11:20 am - 12:25 pm
CNX
-
STL
37h 05m
2 stops
$1,150Multiple Airlines
Fri, Aug 21 - Mon, Aug 24
Multiple Airlines Logo
8:25 am - 10:20 am
STL
-
CNX
37h 55m
2 stops
Multiple Airlines Logo
11:20 am - 5:45 pm
CNX
-
STL
42h 25m
2 stops
$1,161Multiple Airlines
Mon, Apr 27 - Mon, May 4
Multiple Airlines Logo
8:25 am - 10:20 am
STL
-
CNX
37h 55m
2 stops
Multiple Airlines Logo
11:20 am - 2:50 pm
CNX
-
STL
39h 30m
3 stops
$1,180Multiple Airlines
Mon, Apr 27 - Mon, May 4
Multiple Airlines Logo
7:32 pm - 10:25 am
STL
-
CNX
26h 53m
2 stops
Multiple Airlines Logo
11:35 am - 12:25 pm
CNX
-
STL
36h 50m
2 stops
$1,183Multiple Airlines
Fri, Aug 21 - Mon, Aug 24
Multiple Airlines Logo
7:00 am - 10:25 am
STL
-
CNX
39h 25m
2 stops
Multiple Airlines Logo
11:35 am - 11:59 pm
CNX
-
STL
48h 24m
2 stops
$1,185Multiple Airlines
Sun, Apr 26 - Sun, May 3
EVA Air Logo
4:46 pm - 10:25 am
STL
-
CNX
29h 39m
2 stops
EVA Air Logo
11:35 am - 11:54 pm
CNX
-
STL
48h 19m
2 stops
$1,186EVA Air
Mon, May 4 - Tue, Jun 2
China Airlines Logo
4:46 pm - 10:20 am
STL
-
CNX
29h 34m
2 stops
China Airlines Logo
11:20 am - 6:45 pm
CNX
-
STL
43h 25m
2 stops
$1,192China Airlines
Mon, May 4 - Tue, Jun 2

Qatar Airways flights from St. Louis to Chiang Mai

Our best Qatar Airways deals on St. Louis to Chiang Mai flight tickets
Qatar Airways
May 5
STL6:21 amLambert-St Louis
43h 24m
3 stops
CNX1:45 pmChiang Mai
May 14
CNX8:00 pmChiang Mai
38h 19m
3 stops
STL10:19 pmLambert-St Louis
$1,441
Qatar Airways
May 5
STL6:21 amLambert-St Louis
48h 49m
3 stops
CNX7:10 pmChiang Mai
May 14
CNX8:00 pmChiang Mai
38h 19m
3 stops
STL10:19 pmLambert-St Louis
$1,442
Qatar Airways
Aug 21
STL1:37 pmLambert-St Louis
33h 38m
3 stops
CNX11:15 amChiang Mai
Aug 24
CNX8:00 pmChiang Mai
35h 14m
3 stops
STL7:14 pmLambert-St Louis
$1,521

EVA Air flights from St. Louis to Chiang Mai

Our best EVA Air deals on St. Louis to Chiang Mai flight tickets
EVA Air
May 4
STL4:46 pmLambert-St Louis
29h 39m
2 stops
CNX10:25 amChiang Mai
Jun 2
CNX11:35 amChiang Mai
48h 19m
2 stops
STL11:54 pmLambert-St Louis
$1,186
EVA Air
Apr 29
STL4:46 pmLambert-St Louis
29h 39m
2 stops
CNX10:25 amChiang Mai
Jul 2
CNX11:35 amChiang Mai
48h 23m
2 stops
STL11:58 pmLambert-St Louis
$1,279

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Chiang Mai that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 14, 2026.
Use the filters below to find and compare flights from St. Louis to Chiang Mai that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Tue 5/5

8:35 am-10:20 am

2 stops37h 45m

Chiang Mai

Thu 5/14

11:20 am-10:35 am

2 stops35h 15m

$1,128

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Tue 5/5

8:35 am-10:20 am

2 stops37h 45m

Chiang Mai

Thu 5/14

11:20 am-10:35 am

2 stops35h 15m

$1,145

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Tue 4/28

4:46 pm-10:25 am

2 stops29h 39m

Chiang Mai

Tue 5/5

11:35 am-11:59 pm

2 stops48h 24m

$1,146

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Fri 8/21

11:55 am-10:20 am

2 stops34h 25m

Chiang Mai

Mon 8/24

11:20 am-12:25 pm

2 stops37h 05m

$1,150

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Mon 4/27

8:25 am-10:20 am

2 stops37h 55m

Chiang Mai

Mon 5/4

11:20 am-5:45 pm

2 stops42h 25m

$1,161

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Mon 4/27

8:25 am-10:20 am

2 stops37h 55m

Chiang Mai

Mon 5/4

11:20 am-2:50 pm

3 stops39h 30m

$1,180
Quickest round-trip

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Fri 8/21

7:32 pm-10:25 am

2 stops26h 53m

Chiang Mai

Mon 8/24

11:35 am-12:25 pm

2 stops36h 50m

$1,183

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Sun 4/26

7:00 am-10:25 am

2 stops39h 25m

Chiang Mai

Sun 5/3

11:35 am-11:59 pm

2 stops48h 24m

$1,185

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Mon 5/4

4:46 pm-10:25 am

2 stops29h 39m

Chiang Mai

Tue 6/2

11:35 am-11:54 pm

2 stops48h 19m

$1,186

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Mon 5/4

4:46 pm-10:20 am

2 stops29h 34m

Chiang Mai

Tue 6/2

11:20 am-6:45 pm

2 stops43h 25m

$1,192

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Chiang Mai from

How to get the cheapest flight ticket from St. Louis to Chiang Mai

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Lambert-St Louis to Chiang Mai?

EVA Air is the most popular carrier operating from Lambert-St Louis to Chiang Mai

When to book flights from St. Louis to Chiang Mai

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Chiang Mai according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Chiang Mai (STL to CNX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Chiang Mai

Fastest flight time

25h 05m

Direct flights

None
The fastest flight from St. Louis to Chiang Mai takes 25h 05m
There are no direct flights from St. Louis to Chiang Mai. There are no popular flight routes from St. Louis to Chiang Mai.
Search flight deals

  • How far is Lambert-St Louis to Chiang Mai by plane?

    The distance between Lambert-St Louis and Chiang Mai is about 8419.6 mi. By plane, this route typically takes 25h 05m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Chiang Mai Airport?

    Prices for flights from Lambert-St Louis Airport to Chiang Mai Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Lambert-St Louis Airport to Chiang Mai Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Chiang Mai Airport.

  • What documentation or ID do you need to fly to Chiang Mai Airport?

    The travel and health documents required for your trip to Chiang Mai Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Chiang Mai Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Chiang Mai?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Chiang Mai. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Chiang Mai with flexible booking policies on momondo?

All flight searches from St. Louis to Chiang Mai on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from St. Louis to Chiang Mai?

Once you have performed a search for St. Louis to Chiang Mai flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from St. Louis to Chiang Mai right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to Chiang Mai flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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