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Cheap flights from St. Louis to Chiang Mai from $719

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 9/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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
3:19 pm - 10:25 am
STL
-
CNX
31h 06m
2 stops
Multiple Airlines Logo
11:35 am - 2:21 pm
CNX
-
STL
38h 46m
2 stops
$1,338Multiple Airlines
Wed, Sep 9 - Mon, Sep 28
Etihad Airways Logo
8:40 am - 6:05 am
STL
-
CNX
32h 25m
2 stops
Etihad Airways Logo
8:50 am - 7:06 pm
CNX
-
STL
47h 16m
2 stops
$1,416Etihad Airways
Tue, Dec 1 - Fri, Dec 4
Etihad Airways Logo
2:17 pm - 6:05 am
STL
-
CNX
26h 48m
2 stops
Etihad Airways Logo
8:50 am - 7:06 pm
CNX
-
STL
47h 16m
2 stops
$1,422Etihad Airways
Tue, Dec 1 - Fri, Dec 4
Multiple Airlines Logo
7:36 pm - 10:25 am
STL
-
CNX
26h 49m
2 stops
Multiple Airlines Logo
11:35 am - 12:25 pm
CNX
-
STL
36h 50m
2 stops
$1,424Multiple Airlines
Fri, Aug 21 - Mon, Aug 24
Multiple Airlines Logo
3:24 pm - 10:35 am
STL
-
CNX
30h 11m
2 stops
Multiple Airlines Logo
11:50 am - 2:26 pm
CNX
-
STL
39h 36m
2 stops
$1,433Multiple Airlines
Tue, Dec 1 - Fri, Dec 4
Multiple Airlines Logo
7:36 pm - 10:25 am
STL
-
CNX
26h 49m
2 stops
Multiple Airlines Logo
11:35 am - 12:25 pm
CNX
-
STL
36h 50m
2 stops
$1,460Multiple Airlines
Fri, Aug 21 - Mon, Aug 24
Multiple Airlines Logo
7:36 pm - 10:25 am
STL
-
CNX
26h 49m
2 stops
Multiple Airlines Logo
8:00 pm - 2:06 pm
CNX
-
STL
54h 06m
3 stops
$1,498Multiple Airlines
Fri, Aug 21 - Mon, Aug 24
Qatar Airways Logo
1:49 pm - 9:20 am
STL
-
CNX
31h 31m
3 stops
Qatar Airways Logo
8:00 pm - 12:27 am
CNX
-
STL
40h 27m
3 stops
$1,502Qatar Airways
Wed, Sep 9 - Mon, Sep 28
Multiple Airlines Logo
3:24 pm - 4:00 pm
STL
-
CNX
35h 36m
2 stops
Multiple Airlines Logo
10:10 am - 11:59 pm
CNX
-
STL
26h 49m
3 stops
$1,512Multiple Airlines
Tue, Dec 1 - Fri, Dec 4
Multiple Airlines Logo
7:36 pm - 10:25 am
STL
-
CNX
26h 49m
2 stops
Multiple Airlines Logo
8:00 pm - 2:06 pm
CNX
-
STL
54h 06m
3 stops
$1,533Multiple Airlines
Fri, Aug 21 - Mon, Aug 24

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Qatar Airways flights from St. Louis to Chiang Mai

Our best Qatar Airways deals on St. Louis to Chiang Mai flight tickets
Qatar Airways
Sep 9
STL1:49 pmLambert-St Louis
31h 31m
3 stops
CNX9:20 amChiang Mai
Sep 28
CNX8:00 pmChiang Mai
40h 27m
3 stops
STL12:27 amLambert-St Louis
$1,502
Qatar Airways
Aug 21
STL9:32 amLambert-St Louis
37h 43m
3 stops
CNX11:15 amChiang Mai
Aug 24
CNX8:00 pmChiang Mai
35h 27m
3 stops
STL7:27 pmLambert-St Louis
$1,779
Qatar Airways
Aug 21
STL9:32 amLambert-St Louis
35h 48m
3 stops
CNX9:20 amChiang Mai
Aug 24
CNX8:00 pmChiang Mai
35h 27m
3 stops
STL7:27 pmLambert-St Louis
$1,796

Etihad Airways flights from St. Louis to Chiang Mai

Our best Etihad Airways deals on St. Louis to Chiang Mai flight tickets
Etihad Airways
Dec 1
STL8:40 amLambert-St Louis
32h 25m
2 stops
CNX6:05 amChiang Mai
Dec 4
CNX8:50 amChiang Mai
47h 16m
2 stops
STL7:06 pmLambert-St Louis
$1,416
Etihad Airways
Dec 1
STL2:17 pmLambert-St Louis
26h 48m
2 stops
CNX6:05 amChiang Mai
Dec 4
CNX8:50 amChiang Mai
47h 16m
2 stops
STL7:06 pmLambert-St Louis
$1,422

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 June 11, 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

Wed 9/9

3:19 pm-10:25 am

2 stops31h 06m

Chiang Mai

Mon 9/28

11:35 am-2:21 pm

2 stops38h 46m

$1,338

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Tue 12/1

8:40 am-6:05 am

2 stops32h 25m

Chiang Mai

Fri 12/4

8:50 am-7:06 pm

2 stops47h 16m

$1,416

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Tue 12/1

2:17 pm-6:05 am

2 stops26h 48m

Chiang Mai

Fri 12/4

8:50 am-7:06 pm

2 stops47h 16m

$1,422

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Fri 8/21

7:36 pm-10:25 am

2 stops26h 49m

Chiang Mai

Mon 8/24

11:35 am-12:25 pm

2 stops36h 50m

$1,424

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Tue 12/1

3:24 pm-10:35 am

2 stops30h 11m

Chiang Mai

Fri 12/4

11:50 am-2:26 pm

2 stops39h 36m

$1,433

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Fri 8/21

7:36 pm-10:25 am

2 stops26h 49m

Chiang Mai

Mon 8/24

11:35 am-12:25 pm

2 stops36h 50m

$1,460

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Fri 8/21

7:36 pm-10:25 am

2 stops26h 49m

Chiang Mai

Mon 8/24

8:00 pm-2:06 pm

3 stops54h 06m

$1,498

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Wed 9/9

1:49 pm-9:20 am

3 stops31h 31m

Chiang Mai

Mon 9/28

8:00 pm-12:27 am

3 stops40h 27m

$1,502
Quickest round-trip

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Tue 12/1

3:24 pm-4:00 pm

2 stops35h 36m

Chiang Mai

Fri 12/4

10:10 am-11:59 pm

3 stops26h 49m

$1,512

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Fri 8/21

7:36 pm-10:25 am

2 stops26h 49m

Chiang Mai

Mon 8/24

8:00 pm-2:06 pm

3 stops54h 06m

$1,533

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 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?

STARLUX Airlines 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

26h 29m

Direct flights

None
The fastest flight from St. Louis to Chiang Mai takes 26h 29m
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

Frequently asked questions about flying from St. Louis to Chiang Mai

  • 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 26h 29m.

  • 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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