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Chiang Mai

$979+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CNX
oct. 15 — oct. 221
mié. 10/15
mié. 10/22
1 adult, Economy
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Find 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 septiembre 15, 2025.

This Delta deal was found by Cheapflights users on 9/15. 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.
lun. 9/221:26 pmSTL - CNX
2 stops44h 29mDelta
mié. 10/111:15 pmCNX - STL
2 stops37h 23mDelta
Deal found 9/15$979
This Delta deal was found by Cheapflights users on 9/13. 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.
vie. 9/196:40 amSTL - CNX
2 stops27h 15mDelta
mar. 9/2311:15 pmCNX - STL
2 stops34h 45mDelta
Deal found 9/13$1,069
This Korean Air deal was found by Cheapflights users on 9/14. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/198:40 amSTL - CNX
2 stops25h 15mKorean Air
mar. 9/2311:15 pmCNX - STL
2 stops35h 54mKorean Air
Deal found 9/14$1,244
This Qatar Airways deal was found by Cheapflights users on 9/15. 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.
lun. 9/229:46 amSTL - CNX
3 stops35h 34mQatar Airways
mié. 10/12:35 pmCNX - STL
3 stops36h 33mQatar Airways
Deal found 9/15$1,482
This Gurufare deal was found by Cheapflights users on 9/15. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/226:30 pmSTL - CNX
2 stops27h 55mMultiple Airlines
mié. 10/19:10 pmCNX - STL
3 stops53h 29mMultiple Airlines
Deal found 9/15$1,602

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 septiembre 15, 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

lun. 9/22

6:01 am-9:55 pm

2 stops27h 54m

Chiang Mai

mié. 10/1

11:15 pm-11:09 pm

2 stops35h 54m

$979

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

vie. 9/19

8:40 am-9:55 pm

2 stops25h 15m

Chiang Mai

mar. 9/23

11:15 pm-11:09 pm

2 stops35h 54m

$1,069

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

vie. 9/19

8:40 am-9:55 pm

2 stops25h 15m

Chiang Mai

mar. 9/23

11:15 pm-11:09 pm

2 stops35h 54m

$1,244

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

lun. 9/22

9:46 am-9:20 am

3 stops35h 34m

Chiang Mai

mié. 10/1

8:00 pm-7:33 pm

3 stops35h 33m

$1,482

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

lun. 9/22

6:00 am-11:40 pm

2 stops29h 40m

Chiang Mai

mar. 9/30

12:45 am-10:00 pm

3 stops33h 15m

$1,680

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

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 27h 54m. 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.

  • What is the cheapest month to book a flight from St. Louis to Chiang Mai?

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Chiang Mai (average of $975). Flying from St. Louis to Chiang Mai in June is currently the most expensive (average of $1,562). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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