$1,037+ 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 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CNX
Jan 15 — Jan 221
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 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 December 16, 2025.
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 December 16, 2025.
This oojo deal was found by Cheapflights users on 12/16. 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.
Wed 12/176:55 amSTL - CNX
2 stops38h 30mChina Airlines
Tue 12/2311:25 amCNX - STL
2 stops49h 34mChina Airlines
Deal found 12/16![China Airlines logo]()
$17,918
This KAYAK deal was found by Cheapflights users on 12/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/176:55 amSTL - CNX
2 stops42h 25mMultiple Airlines
Tue 12/239:40 pmCNX - STL
3 stops58h 59mMultiple Airlines
Deal found 12/16![Multiple Airlines logo]()
$18,581
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 December 16, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $1,037 (China Airlines) |
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 December 16, 2025.
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
Fri 5/1
2:25 pm-10:20 am
2 stops31h 55m
Chiang Mai
Fri 5/8
11:20 am-9:05 pm
2 stops21h 45m
$1,037
St. LouisChiang Mai
STL - CNX
STLCNX
Lambert-St Louis
Fri 5/1
2:55 pm-10:25 am
2 stops31h 30m
Chiang Mai
Thu 5/7
11:35 am-2:11 pm
2 stops38h 36m
$1,150
St. LouisChiang Mai
STL - CNX
STLCNX
Lambert-St Louis
Thu 4/30
2:55 pm-10:25 am
2 stops31h 30m
Chiang Mai
Fri 5/8
11:35 am-2:11 pm
2 stops38h 36m
$1,197
St. LouisChiang Mai
STL - CNX
STLCNX
Lambert-St Louis
Fri 5/1
11:14 am-11:15 am
3 stops36h 01m
Chiang Mai
Fri 5/8
2:35 pm-2:03 pm
3 stops35h 28m
$1,406
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 December.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Chiang Mai flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Chiang Mai flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.