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Chiang Mai

$1,421+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CNX
Aug 5 — Aug 121
Wed 8/5
Wed 8/12
1 adult, Economy
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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 July 6, 2026.

This Justfly.com deal was found by Cheapflights users on 7/1. 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.
Wed 10/214:40 pm
STL
-
CNX
2 stops29h 45m
Multiple Airlines
Fri 10/3011:50 am
CNX
-
STL
2 stops48h 09m
Multiple Airlines
Deal found 7/1$1,421
This oojo deal was found by Cheapflights users on 7/1. 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
STL
-
CNX
2 stops26h 49m
EVA Air
Mon 8/2411:35 am
CNX
-
STL
2 stops38h 31m
EVA Air
Deal found 7/1$1,445
This KAYAK deal was found by Cheapflights users on 7/1. 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.
Tue 12/13:24 pm
STL
-
CNX
2 stops30h 11m
Multiple Airlines
Fri 12/411:50 am
CNX
-
STL
2 stops39h 36m
Multiple Airlines
Deal found 7/1$1,456
This KAYAK deal was found by Cheapflights users on 7/1. 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.
Fri 8/217:36 pm
STL
-
CNX
2 stops26h 49m
Multiple Airlines
Mon 8/248:00 pm
CNX
-
STL
3 stops54h 06m
Multiple Airlines
Deal found 7/1$1,468

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 July 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,421
(Justfly.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

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 July 6, 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

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

$1,468
Quickest round-trip

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

$1,490

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Wed 10/21

7:29 am-9:20 am

3 stops37h 51m

Chiang Mai

Fri 10/30

7:45 pm-9:13 pm

3 stops37h 28m

$1,628

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Fri 8/21

1:25 pm-9:20 am

3 stops31h 55m

Chiang Mai

Mon 8/24

8:00 pm-11:34 pm

3 stops39h 34m

$1,824

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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 July.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 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.

  • 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.

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