HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chiang Mai

$611+ Cheap flights from St. Louis (STL) to Chiang Mai (CNX)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/27. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CNX
Mar 20 — Mar 271
Fri 3/20
Fri 3/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Chiang Mai with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from St. Louis to Chiang Mai

Cheapest flights from St. Louis to Chiang Mai
Explore the most affordable flight options available from St. Louis to Chiang Mai. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 18, 2026.

This oojo deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/54:46 pm
STL
-
CNX
2 stops29h 34m
China Airlines
Thu 5/1411:20 am
CNX
-
STL
2 stops43h 25m
China Airlines
Deal found 2/16$1,043
This SmartFares deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/54:20 pm
STL
-
CNX
2 stops30h 05m
Multiple Airlines
Wed 6/311:35 am
CNX
-
STL
2 stops43h 25m
Multiple Airlines
Deal found 2/14$1,066
This Qatar Airways deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/511:45 am
STL
-
CNX
3 stops35h 30m
Qatar Airways
Thu 5/148:00 pm
CNX
-
STL
3 stops38h 19m
Qatar Airways
Deal found 2/14$1,394
This KAYAK deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/167:00 am
STL
-
CNX
2 stops39h 35m
Multiple Airlines
Tue 3/3111:35 am
CNX
-
STL
2 stops48h 24m
Multiple Airlines
Deal found 2/17$1,442
This Qatar Airways deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/510:39 am
STL
-
CNX
3 stops36h 36m
Qatar Airways
Wed 6/38:00 pm
CNX
-
STL
3 stops36h 30m
Qatar Airways
Deal found 2/14$1,586

Find flight deals from St. Louis to Chiang Mai

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Chiang Mai (CNX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,043
(oojo)

One-way from

$611
(Kiwi.com)
Provider with most accurate pricing for Lambert-St Louis-Chiang Mai flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Chiang Mai flights.
Search Deals
From Lambert-St Louis to Chiang Mai
Search Deals
One-way flight from Lambert-St Louis to Chiang Mai
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated February 18, 2026.
Use the filters below to find and compare flights from St. Louis to Chiang Mai that are best for you.

Fly from

St. Louis

Fly to

Chiang Mai

Route

Depart

Return

Price

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Tue 5/5

4:46 pm-10:20 am

2 stops29h 34m

Chiang Mai

Thu 5/14

11:20 am-11:54 pm

2 stops48h 34m

$1,043

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Sun 4/5

4:20 pm-10:25 am

2 stops30h 05m

Chiang Mai

Wed 6/3

11:35 am-7:00 pm

2 stops43h 25m

$1,066

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Tue 5/5

11:45 am-11:15 am

3 stops35h 30m

Chiang Mai

Thu 5/14

8:00 pm-10:19 pm

3 stops38h 19m

$1,394

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Mon 3/16

7:00 am-10:35 am

2 stops39h 35m

Chiang Mai

Tue 3/31

11:35 am-11:59 pm

2 stops48h 24m

$1,442

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Fri 2/27

10:11 pm-10:35 am

3 stops47h 24m

$611

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Sat 2/21

3:49 pm-10:35 am

3 stops53h 46m

$653

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/14

Compare providers for flights from St. Louis to Chiang Mai

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Chiang Mai in February.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Chiang Mai flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Chiang Mai flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Chiang Mai flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Chiang Mai flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Chiang Mai flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Chiang Mai

Have a flexible travel schedule? Discover the best time to fly to Chiang Mai from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Chiang Mai. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from St. Louis to Chiang Mai?

    Departing from St. Louis to Chiang Mai will take you 29h 34m. The distance from St. Louis to Chiang Mai is about 8411 mi.

  • Can I find deals for flights from St. Louis to Chiang Mai that include hotel bookings?

    Yes. In addition to deals on St. Louis to Chiang Mai flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Chiang Mai?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Chiang Mai.

  • Can I find deals for business class flights from St. Louis to Chiang Mai?

    Yes. Cheapflights offers flight deals from St. Louis to Chiang Mai by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.