Flight tickets from St Louis to Chiang Mai

Compare St Louis to Chiang Mai flight deals

Find the cheapest month or even day of the year to fly to Chiang Mai

Book the best Chiang Mai fare with no extra fees

Flight deals from St Louis to Chiang Mai

Looking for a cheap last-minute deal or the best return flight from St Louis to Chiang Mai? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from St Louis to Chiang Mai

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Chiang Mai flights are currently cheapest in November.

St Louis to Chiang Mai: Alternative routes

Compare routes from St Louis to Chiang Mai below. You may find an airport to fly into that's cheaper, faster, or easier than Chiang Mai.

St Louis to Chiang Mai: Flight information

The things to know before you go.
Cheapest flight found₹ 69,790
Cheapest month to flyNovember

Finding cheap flights from St Louis to Chiang Mai: Frequently asked questions

The best price we found for a return flight from St Louis to Chiang Mai is ₹ 126,416. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from St Louis to Chiang Mai. But we found flights with one or more stops from ₹ 126,416.
As of May 2026, there are no flights flying from St Louis to Chiang Mai.
The cheapest month to fly from St Louis to Chiang Mai is usually September.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Chiang Mai Airport on Tuesday, 1 September 2026.
No airlines currently offer direct flights between St Louis Airport and Chiang Mai Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Chiang Mai but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Chiang Mai is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Alaska Airlines offers the cheapest flight tickets to Chiang Mai.

Flying from Lambert-St. Louis International Airport (STL) to Chiang Mai International Airport (CNX): what you need to know

  • The timezone in Chiang Mai is UTC+7, which is 12 hours ahead of St Louis.

  • For a smooth journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This ensures you have enough time to catch your STL to CNX flight.

  • Flying during a peak time such as July? Public holidays and other high seasons can mean longer lines and delays at check-in and security. Be extra cautious and get there up to four hours before international flights and two hours before domestic departures.

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Chiang Mai International Airport (CNX)

  • ₹ 69,790 is the lowest price for a one-way Lambert-St. Louis International Airport to Chiang Mai International Airport flight. A return flight starts at ₹ 126,416. These prices can change depending on demand.

  • Don't wait until the last moment. You're more likely to find cheap tickets from STL to CNX if you book ahead. Airlines often offer some excellent early bird discounts.

  • If you're flexible with your trip dates, try using the 'Whole month' tool. It'll find the cheapest price across every month when looking for a flight from Lambert-St. Louis International Airport to Chiang Mai International Airport.

  • Finding cheap flights from STL to CNX is easy with Price Alerts. All you need to do is create one of these automatic alerts and we'll notify you when a lower fare pops up.

  • Select your preferred arrival and departure times, airlines and number of stops with the filters. Or sort your results by 'Cheapest' to get the best deals on flights from Lambert-St. Louis International Airport to Chiang Mai International Airport.

Handy information about Lambert-St. Louis International Airport (STL)

Arriving at Chiang Mai International Airport (CNX)

  • If you're getting in on a late Lambert-St. Louis International Airport to Chiang Mai International Airport flight, few things top the convenience of being close to the terminal. Grab your suitcases from the carousel and then be tucked up in bed soon after at one of these options near CNX:

  • Pick up a Chiang Mai International Airport rental car and discover Chiang Mai and beyond with your own set of wheels. Chic Car Rent, asap car hire and Hertz are popular outlets to choose from here.

  • To get the lowest price, reserve your vehicle from Chiang Mai International Airport about two weeks before you set off.

Getting from Chiang Mai International Airport (CNX) to central Chiang Mai

  • Chiang Mai International Airport to central Chiang Mai has a drive time of around 10 minutes. It's approximately 5 kilometres away.

  • It takes roughly 25 minutes to get there by public transport.

When to fly to Chiang Mai International Airport (CNX)

  • August is the most popular month for flights from Lambert-St. Louis International Airport to Chiang Mai International Airport. To steer clear of the crowds, go to Chiang Mai in February.

  • Book your flight from Lambert-St. Louis International Airport to Chiang Mai International Airport for April if you'd like to go to Chiang Mai during its warmest month. Expect temperatures of between 22ºC and 42ºC.

  • If you want to travel in cooler conditions, look for a cheap ticket from STL to CNX in January. Temperatures average between 12ºC and 31ºC then.

Explore more of Thailand

  • Udon Thani is just one of the many places in Thailand waiting to be explored once you've seen the sights of Chiang Mai. Around 434 kilometres away to the east, its best attractions include Nong Prajak Public Park, Krom Luang Prachaksinlapakhom Monument and Chinesisches Tor.

  • If you're looking to explore another great destination in Thailand, head for Lampang, about 80 kilometres south-east of Chiang Mai. Baan Sao Nak, Ratsadapisek Bridge and Horse-Drawn Carriage are the start of reasons to visit.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.