$1,154+ Cheap flights from St. Louis (STL) to Chiang Mai (CNX)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CNX
Sep 19 — Sep 261
Round-trip
1 adult, Economy
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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
Best
Last-minute
Cheapest flights from St. Louis to Chiang MaiExplore 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 August 20, 2026.
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 August 20, 2026.
This Korean Air deal was found by Cheapflights users on 8/16. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:00 am -
2 stops28h 55m
Sun 11/112:15 am -
2 stops29h 13m
Deal found 8/16![Korean Air logo]()
$1,154
This Justfly.com deal was found by Cheapflights users on 8/20. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/83:19 pm -
2 stops31h 06m
Thu 9/1711:35 am -
2 stops38h 46m
Deal found 8/20![Multiple Airlines logo]()
$1,248
This SmartFares deal was found by Cheapflights users on 8/17. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:36 pm -
2 stops26h 49m
Thu 10/811:35 am -
2 stops40h 09m
Deal found 8/17![Multiple Airlines logo]()
$1,290
This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/13:24 pm -
2 stops30h 11m
Fri 12/411:50 am -
2 stops39h 36m
Deal found 8/17![Multiple Airlines logo]()
$1,320
This Qatar Airways deal was found by Cheapflights users on 8/20. 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 9/81:25 pm -
3 stops31h 55m
Thu 9/178:00 pm -
3 stops36h 44m
Deal found 8/20![Qatar Airways logo]()
$1,357
This Qatar Airways deal was found by Cheapflights users on 8/17. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:09 am -
3 stops36h 06m
Thu 10/88:00 pm -
3 stops36h 57m
Deal found 8/17![Qatar Airways logo]()
$1,572
This Qatar Airways deal was found by Cheapflights users on 8/18. 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 12/11:15 pm -
3 stops33h 05m
Fri 12/47:45 pm -
3 stops36h 54m
Deal found 8/18![Qatar Airways logo]()
$2,043
Best flights from St. Louis to Chiang MaiDiscover carefully curated flight deals from St. Louis to Chiang Mai that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 20, 2026.
Discover carefully curated flight deals from St. Louis to Chiang Mai that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 20, 2026.
This Korean Air deal was found by Cheapflights users on 8/17. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/297:00 am -
2 stops27h 55m
Sun 11/112:15 am -
2 stops26h 05m
Deal found 8/17![Korean Air logo]()
$1,154
This Justfly.com deal was found by Cheapflights users on 8/20. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/83:19 pm -
2 stops31h 06m
Thu 9/1711:35 am -
2 stops38h 46m
Deal found 8/20![Multiple Airlines logo]()
$1,248
This Qatar Airways deal was found by Cheapflights users on 8/20. 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 9/81:25 pm -
3 stops31h 55m
Thu 9/178:00 pm -
3 stops36h 44m
Deal found 8/20![Qatar Airways logo]()
$1,357
This SmartFares deal was found by Cheapflights users on 8/17. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:36 pm -
2 stops26h 49m
Thu 10/811:35 am -
2 stops40h 09m
Deal found 8/17![Multiple Airlines logo]()
$1,290
This Qatar Airways deal was found by Cheapflights users on 8/17. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:09 am -
3 stops36h 06m
Thu 10/88:00 pm -
3 stops36h 57m
Deal found 8/17![Qatar Airways logo]()
$1,572
Last-minute flights from St. Louis to Chiang MaiDiscover last-minute flight deals from St. Louis to Chiang Mai. Data last updated August 20, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Chiang Mai. Data last updated August 20, 2026 and is based on user searches.
This Qatar Airways deal was found by Cheapflights users on 8/20. 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.
Fri 8/219:32 am -
3 stops35h 48m
Mon 8/248:40 pm -
3 stops38h 00m
Deal found 8/20![Qatar Airways logo]()
$2,499
This oojo deal was found by Cheapflights users on 8/16. 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.
Fri 8/217:36 pm -
2 stops26h 49m
Mon 8/2411:35 am -
2 stops38h 31m
Deal found 8/16![EVA Air logo]()
$3,877
This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/218:55 am -
2 stops40h 30m
Mon 8/2411:20 am -
2 stops43h 18m
Deal found 8/17![Multiple Airlines logo]()
$4,834
This Korean Air deal was found by Cheapflights users on 8/19. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:00 am -
2 stops49h 45m
Mon 8/249:45 pm -
2 stops28h 48m
Deal found 8/19![Korean Air logo]()
$5,012
This Justfly.com deal was found by Cheapflights users on 8/20. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/83:19 pm -
2 stops31h 06m
Thu 9/1711:35 am -
2 stops38h 46m
Deal found 8/20![Multiple Airlines logo]()
$1,248
This Qatar Airways deal was found by Cheapflights users on 8/20. 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 9/81:25 pm -
3 stops31h 55m
Thu 9/178:00 pm -
3 stops36h 44m
Deal found 8/20![Qatar Airways logo]()
$1,357
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 August 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,154 (Korean Air) |
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 7,457,451 searches. Data last updated August 20, 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
Cheapest round-trip
Quickest round-trip
St. LouisChiang Mai
STL Lambert-St Louis - CNX Chiang Mai
STLCNX
Lambert-St Louis
Thu 10/29
7:00 am-10:55 pm
2 stops27h 55m
Chiang Mai
Sun 11/1
12:15 am-1:20 pm
2 stops26h 05m
$1,154
St. LouisChiang Mai
STL Lambert-St Louis - CNX Chiang Mai
STLCNX
Lambert-St Louis
Tue 9/8
3:19 pm-10:25 am
2 stops31h 06m
Chiang Mai
Thu 9/17
11:35 am-2:21 pm
2 stops38h 46m
$1,248
St. LouisChiang Mai
STL Lambert-St Louis - CNX Chiang Mai
STLCNX
Lambert-St Louis
Thu 10/1
7:36 pm-10:25 am
2 stops26h 49m
Chiang Mai
Thu 10/8
11:35 am-3:44 pm
2 stops40h 09m
$1,290
St. LouisChiang Mai
STL Lambert-St Louis - CNX Chiang Mai
STLCNX
Lambert-St Louis
Tue 9/8
1:25 pm-9:20 am
3 stops31h 55m
Chiang Mai
Thu 9/17
8:00 pm-8:44 pm
3 stops36h 44m
$1,357
St. LouisChiang Mai
STL Lambert-St Louis - CNX Chiang Mai
STLCNX
Lambert-St Louis
Thu 10/1
11:09 am-11:15 am
3 stops36h 06m
Chiang Mai
Thu 10/8
8:00 pm-8:57 pm
3 stops36h 57m
$1,572
Sorted by cheapest first
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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
STL-CNX
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.
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