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Chiang Mai

$3,428+ 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 12/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CNX
Dec 24 — Dec 311
Wed 12/24
Wed 12/31
1 adult, Economy
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Cheap 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 November 24, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$3,428
(EVA Air)
Provider with most accurate pricing for Lambert-St Louis-Chiang Mai flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Chiang Mai flights.
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From Lambert-St Louis to Chiang Mai
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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 November 24, 2025.

This EVA Air deal was found by Cheapflights users on 11/24. 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.
Sun 12/212:40 pmSTL - CNX
2 stops30h 55mMultiple Airlines
Sat 1/311:50 amCNX - STL
2 stops36h 00mMultiple Airlines
Deal found 11/24$3,428
This Delta deal was found by Cheapflights users on 11/24. 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 12/217:02 pmSTL - CNX
2 stops38h 53mDelta
Sun 1/412:15 amCNX - STL
2 stops45h 38mDelta
Deal found 11/24$4,244
This Delta deal was found by Cheapflights users on 11/24. 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.
Mon 12/226:29 amSTL - CNX
2 stops27h 26mDelta
Sat 1/312:15 amCNX - STL
2 stops33h 32mDelta
Deal found 11/24$4,298
This Korean Air deal was found by Cheapflights users on 11/24. 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.
Sun 12/216:29 amSTL - CNX
2 stops27h 26mKorean Air
Mon 1/59:40 pmCNX - STL
2 stops34h 32mKorean Air
Deal found 11/24$4,671
This Delta deal was found by Cheapflights users on 11/24. 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 12/217:02 pmSTL - CNX
2 stops38h 53mDelta
Thu 1/112:15 amCNX - STL
2 stops36h 27mDelta
Deal found 11/24$4,716
This Korean Air deal was found by Cheapflights users on 11/24. 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.
Sun 12/216:05 amSTL - CNX
2 stops27h 50mKorean Air
Fri 1/212:15 amCNX - STL
2 stops34h 28mKorean Air
Deal found 11/24$4,835
This Delta deal was found by Cheapflights users on 11/24. 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.
Mon 12/227:20 amSTL - CNX
2 stops26h 35mDelta
Fri 1/212:15 amCNX - STL
2 stops55h 02mDelta
Deal found 11/24$4,946
This Korean Air deal was found by Cheapflights users on 11/24. 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 12/226:00 amSTL - CNX
2 stops27h 55mKorean Air
Mon 1/59:40 pmCNX - STL
2 stops30h 08mKorean Air
Deal found 11/24$4,996

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 November 24, 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

Sun 12/21

2:40 pm-10:35 am

2 stops30h 55m

Chiang Mai

Sat 1/3

11:50 am-10:50 am

2 stops36h 00m

$3,428

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Sun 12/21

7:02 pm-10:55 pm

2 stops38h 53m

Chiang Mai

Sun 1/4

12:15 am-8:53 am

2 stops45h 38m

$4,244

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Mon 12/22

6:29 am-10:55 pm

2 stops27h 26m

Chiang Mai

Sat 1/3

12:15 am-8:47 pm

2 stops33h 32m

$4,298

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Mon 12/22

6:00 am-10:55 pm

2 stops27h 55m

Chiang Mai

Thu 1/1

12:15 am-9:40 pm

2 stops34h 25m

$4,716

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Sun 12/21

7:02 pm-10:55 pm

2 stops38h 53m

Chiang Mai

Thu 1/1

12:15 am-11:42 pm

2 stops36h 27m

$4,716

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Sun 12/21

6:05 am-10:55 pm

2 stops27h 50m

Chiang Mai

Fri 1/2

12:15 am-9:43 pm

2 stops34h 28m

$4,835

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Mon 12/22

6:00 am-10:55 pm

2 stops27h 55m

Chiang Mai

Mon 1/5

9:40 pm-2:48 pm

2 stops30h 08m

$4,996

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

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 November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 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 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.

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 38h 53m. 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.

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