$635+ 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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CNX
Nov 6 — Nov 131
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
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Last-minute
One-way
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 October 7, 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 October 7, 2026.
This SmartFares deal was found by Cheapflights users on 10/3. 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.
Tue 11/172:28 pm -
2 stops36h 32m
Tue 11/245:15 pm -
2 stops58h 07m
Deal found 10/3![Multiple Airlines logo]()
$1,383
This Korean Air deal was found by Cheapflights users on 10/5. 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.
Tue 12/17:03 am -
2 stops26h 42m
Thu 12/312:20 am -
2 stops26h 08m
Deal found 10/5![Korean Air logo]()
$1,428
This FlightHub deal was found by Cheapflights users on 10/6. 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 12/16:04 am -
2 stops39h 31m
Fri 12/411:50 am -
2 stops41h 50m
Deal found 10/6![Multiple Airlines logo]()
$1,465
This Delta deal was found by Cheapflights users on 10/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/277:05 am -
2 stops26h 40m
Wed 1/612:20 am -
2 stops27h 23m
Deal found 10/2![Delta logo]()
$1,901
This Qatar Airways deal was found by Cheapflights users on 10/3. 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 11/171:15 pm -
3 stops40h 45m
Tue 11/246:40 pm -
3 stops38h 10m
Deal found 10/3![Qatar Airways logo]()
$1,962
This Qatar Airways deal was found by Cheapflights users on 10/6. 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 12/16:00 am -
3 stops38h 25m
Fri 12/47:45 pm -
3 stops39h 40m
Deal found 10/6![Qatar Airways logo]()
$2,211
This Korean Air deal was found by Cheapflights users on 10/3. 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.
Mon 10/197:00 am -
2 stops25h 45m
Thu 10/229:45 pm -
2 stops27h 35m
Deal found 10/3![Korean Air logo]()
$2,277
This Justfly.com deal was found by Cheapflights users on 10/6. 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.
Sat 12/126:04 am -
2 stops39h 31m
Thu 1/711:50 am -
2 stops40h 06m
Deal found 10/6![Multiple Airlines logo]()
$2,345
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 October 7, 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 October 7, 2026.
This Korean Air deal was found by Cheapflights users on 10/7. 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.
Mon 2/16:00 am -
2 stops27h 45m
Sun 2/1412:20 am -
2 stops27h 23m
Deal found 10/7![Korean Air logo]()
$1,216
This EVA Air deal was found by Cheapflights users on 10/2. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/126:05 pm -
2 stops27h 30m
Sat 2/2011:50 am -
2 stops39h 16m
Deal found 10/2![Multiple Airlines logo]()
$1,403
This Korean Air deal was found by Cheapflights users on 10/4. 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 2/126:00 am -
2 stops27h 45m
Fri 2/1912:20 am -
2 stops27h 23m
Deal found 10/4![Korean Air logo]()
$1,254
This Korean Air deal was found by Cheapflights users on 10/5. 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.
Tue 12/17:03 am -
2 stops26h 42m
Thu 12/312:20 am -
2 stops26h 08m
Deal found 10/5![Korean Air logo]()
$1,428
Last-minute flights from St. Louis to Chiang MaiDiscover last-minute flight deals from St. Louis to Chiang Mai. Data last updated October 7, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Chiang Mai. Data last updated October 7, 2026 and is based on user searches.
This Korean Air deal was found by Cheapflights users on 10/3. 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.
Mon 10/197:00 am -
2 stops25h 45m
Thu 10/229:45 pm -
2 stops27h 35m
Deal found 10/3![Korean Air logo]()
$2,277
This SmartFares deal was found by Cheapflights users on 10/3. 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.
Tue 11/172:28 pm -
2 stops36h 32m
Tue 11/245:15 pm -
2 stops58h 07m
Deal found 10/3![Multiple Airlines logo]()
$1,383
This Qatar Airways deal was found by Cheapflights users on 10/3. 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 11/171:15 pm -
3 stops40h 45m
Tue 11/246:40 pm -
3 stops38h 10m
Deal found 10/3![Qatar Airways logo]()
$1,962
One-way flights from St. Louis to Chiang MaiSearch for one-way flight options from St. Louis to Chiang Mai. Find affordable one-way fares based on user searches. Data last updated October 7, 2026.
Search for one-way flight options from St. Louis to Chiang Mai. Find affordable one-way fares based on user searches. Data last updated October 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/512:14 pm -
3 stops44h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Multiple Airlines logo]()
$635
This FlightHub deal was found by Cheapflights users on 10/2. 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 11/32:28 pm -
2 stops36h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![STARLUX Airlines logo]()
$685
This Kiwi.com deal was found by Cheapflights users on 10/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/67:59 pm -
3 stops59h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Multiple Airlines logo]()
$686
This Kiwi.com deal was found by Cheapflights users on 10/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:00 am -
3 stops48h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/3![Multiple Airlines logo]()
$714
This Kiwi.com deal was found by Cheapflights users on 10/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/38:10 am -
3 stops37h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Multiple Airlines logo]()
$735
This Delta deal was found by Cheapflights users on 10/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/66:00 am -
2 stops27h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Delta logo]()
$745
This Delta deal was found by Cheapflights users on 10/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/512:00 pm -
2 stops45h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Delta logo]()
$755
This Korean Air deal was found by Cheapflights users on 10/2. 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.
Wed 11/47:00 am -
2 stops26h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Korean Air logo]()
$777
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 October 7, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $1,256 (Ovago) |
One-way from | $635 (Kiwi.com) |
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 October 7, 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
St. LouisChiang Mai
STL Lambert-St Louis - CNX Chiang Mai
STLCNX
Lambert-St Louis
Thu 11/5
12:14 pm-9:20 pm
3 stops44h 06m
Chiang Mai
Wed 12/31
12:00 am-11:00 am
Nonstop0h 00m
$635
St. LouisChiang Mai
STL Lambert-St Louis - CNX Chiang Mai
STLCNX
Lambert-St Louis
Tue 11/3
2:28 pm-4:00 pm
2 stops36h 32m
Chiang Mai
Wed 12/31
12:00 am-11:00 am
Nonstop0h 00m
$685
St. LouisChiang Mai
STL Lambert-St Louis - CNX Chiang Mai
STLCNX
Lambert-St Louis
Fri 11/6
7:59 pm-8:40 pm
3 stops59h 41m
Chiang Mai
Wed 12/31
12:00 am-11:00 am
Nonstop0h 00m
$686
St. LouisChiang Mai
STL Lambert-St Louis - CNX Chiang Mai
STLCNX
Lambert-St Louis
Wed 11/4
6:00 am-7:00 pm
3 stops48h 00m
Chiang Mai
Wed 12/31
12:00 am-11:00 am
Nonstop0h 00m
$714
St. LouisChiang Mai
STL Lambert-St Louis - CNX Chiang Mai
STLCNX
Lambert-St Louis
Fri 11/6
6:00 am-10:45 pm
2 stops27h 45m
Chiang Mai
Wed 12/31
12:00 am-11:00 am
Nonstop0h 00m
$745
St. LouisChiang Mai
STL Lambert-St Louis - CNX Chiang Mai
STLCNX
Lambert-St Louis
Thu 11/5
12:00 pm-10:45 pm
2 stops45h 45m
Chiang Mai
Wed 12/31
12:00 am-11:00 am
Nonstop0h 00m
$755
Quickest round-trip
St. LouisChiang Mai
STL Lambert-St Louis - CNX Chiang Mai
STLCNX
Lambert-St Louis
Wed 11/4
7:00 am-10:45 pm
2 stops26h 45m
Chiang Mai
Wed 12/31
12:00 am-11:00 am
Nonstop0h 00m
$777
St. LouisChiang Mai
STL Lambert-St Louis - CNX Chiang Mai
STLCNX
Lambert-St Louis
Mon 2/1
6:00 am-10:45 pm
2 stops27h 45m
Chiang Mai
Sun 2/14
12:20 am-2:43 pm
2 stops27h 23m
$1,216
St. LouisChiang Mai
STL Lambert-St Louis - CNX Chiang Mai
STLCNX
Lambert-St Louis
Fri 2/12
6:00 am-10:45 pm
2 stops27h 45m
Chiang Mai
Fri 2/19
12:20 am-2:43 pm
2 stops27h 23m
$1,254
St. LouisChiang Mai
STL Lambert-St Louis - CNX Chiang Mai
STLCNX
Lambert-St Louis
Fri 2/12
6:05 pm-10:35 am
2 stops27h 30m
Chiang Mai
Sat 2/20
11:50 am-2:06 pm
2 stops39h 16m
$1,403
Showing 1-10 of 11 resultsSorted 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 October.
| 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 Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on St. Louis-Chiang Mai flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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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