$659 Cheap Flights from Chiang Mai (CNX) to St. Louis (STL)

View $659 flight on Sat, May 24, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Chiang Mai to St. Louis (CNX-STL)

Prices were available within the past 7 days and start at $659 for one-way flights and $1,213 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

EVA Airways
Mon, Oct 6 - Wed, Oct 22
CNX
Chiang Mai
STL
St. Louis
$1,213 Roundtrip, found 4 days ago
$1,213
Roundtrip
found 4 days ago
Select EVA Airways flight, departing Mon, Oct 6 from Chiang Mai to St. Louis, returning Wed, Oct 22, priced at $1,213 found 4 days ago
EVA Airways
Mon, Oct 6 - Wed, Oct 22
CNX
Chiang Mai
STL
St. Louis
$1,233 Roundtrip, found 4 days ago
$1,233
Roundtrip
found 4 days ago
Select EVA Airways flight, departing Mon, Oct 6 from Chiang Mai to St. Louis, returning Wed, Oct 22, priced at $1,233 found 4 days ago
EVA Airways
Mon, Oct 6 - Wed, Oct 22
CNX
Chiang Mai
STL
St. Louis
$1,245 Roundtrip, found 4 days ago
$1,245
Roundtrip
found 4 days ago
Select EVA Airways flight, departing Mon, Oct 6 from Chiang Mai to St. Louis, returning Wed, Oct 22, priced at $1,245 found 4 days ago
EVA Airways
Mon, Oct 6 - Wed, Oct 22
CNX
Chiang Mai
STL
St. Louis
$1,264 Roundtrip, found 4 days ago
$1,264
Roundtrip
found 4 days ago
Select EVA Airways flight, departing Mon, Oct 6 from Chiang Mai to St. Louis, returning Wed, Oct 22, priced at $1,264 found 4 days ago
EVA Airways
Mon, Oct 6 - Wed, Oct 22
CNX
Chiang Mai
STL
St. Louis
$1,281 Roundtrip, found 4 days ago
$1,281
Roundtrip
found 4 days ago
Select EVA Airways flight, departing Mon, Oct 6 from Chiang Mai to St. Louis, returning Wed, Oct 22, priced at $1,281 found 4 days ago
EVA Airways
Mon, Oct 6 - Wed, Oct 22
CNX
Chiang Mai
STL
St. Louis
$1,312 Roundtrip, found 4 days ago
$1,312
Roundtrip
found 4 days ago
Select EVA Airways flight, departing Mon, Oct 6 from Chiang Mai to St. Louis, returning Wed, Oct 22, priced at $1,312 found 4 days ago
Asiana Airlines
Mon, Oct 6 - Sun, Oct 19
CNX
Chiang Mai
STL
St. Louis
$1,354 Roundtrip, found 4 days ago
$1,354
Roundtrip
found 4 days ago
Select Asiana Airlines flight, departing Mon, Oct 6 from Chiang Mai to St. Louis, returning Sun, Oct 19, priced at $1,354 found 4 days ago
Asiana Airlines
Sun, Oct 5 - Sun, Oct 19
CNX
Chiang Mai
STL
St. Louis
$1,374 Roundtrip, found 4 days ago
$1,374
Roundtrip
found 4 days ago
Select Asiana Airlines flight, departing Sun, Oct 5 from Chiang Mai to St. Louis, returning Sun, Oct 19, priced at $1,374 found 4 days ago
Delta
Tue, Jul 1 - Thu, Jul 31
CNX
Chiang Mai
STL
St. Louis
$1,579 Roundtrip, found 3 days ago
$1,579
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Jul 1 from Chiang Mai to St. Louis, returning Thu, Jul 31, priced at $1,579 found 3 days ago
Korean Air
Sat, Jun 28 - Tue, Jul 15
CNX
Chiang Mai
STL
St. Louis
$2,010 Roundtrip, found 21 hours ago
$2,010
Roundtrip
found 21 hours ago
Select Korean Air flight, departing Sat, Jun 28 from Chiang Mai to St. Louis, returning Tue, Jul 15, priced at $2,010 found 21 hours ago

Frequently asked questions

How much does a flight from Chiang Mai Intl. Airport (CNX) to Lambert-St. Louis Intl. Airport (STL) cost?
Discover the latest flight deals from CNX to STL by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from CNX to STL?
The cheapest flights from CNX to STL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from CNX to STL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from CNX to STL. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Chiang Mai Intl. Airport (CNX) to Lambert-St. Louis Intl. Airport (STL)?
There aren’t any daily nonstop flights departing from Chiang Mai Intl. Airport (CNX) to Lambert-St. Louis Intl. Airport (STL). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you’ll be soaring above the clouds before you know it.
What day of the week has the most flights from CNX to STL?
You’ll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Chiang Mai Intl. Airport (CNX) to Lambert-St. Louis Intl. Airport (STL)?
To touch down at Lambert-St. Louis Intl. Airport (STL) on time, select a flight that leaves Chiang Mai Intl. Airport (CNX) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Chiang Mai Intl. Airport (CNX) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Waiting until just before your trip to book a flight from CNX to STL generally means paying more. While you might find some last-minute offers, they aren’t always guaranteed. Allow some flexibility in your schedule to boost your chances of scoring a bargain.
Is it cheaper to book a CNX to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking a CNX to STL flight and hotel package with Expedia could lead to significant savings. What’s more, having everything in one place will take the hassle out of planning your trip. Simply secure your flights and select from our wide range of stays, then customize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Chiang Mai Intl. Airport (CNX) to Lambert-St. Louis Intl. Airport (STL)?
You can usually cancel or reschedule your CNX to STL flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline’s policies in your itinerary to see what changes are possible and if any costs are involved. You’ll also find more information on our Customer Service portal.
*Available to One Key members.