Cheap Flights 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

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 foundRs171,008
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 Rs381,225. 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 Rs381,225.
As of July 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 October.
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 Thursday, 1 October 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, Frontier Airlines offers the cheapest flight tickets to Chiang Mai.

Travelling from St Louis Airport (STL) to Chiang Mai Airport (CNX): what you need to know

  • Chiang Mai is 13 hours ahead of St Louis and observes the UTC+7 timezone.

  • To ensure you get on your STL to CNX flight, leave plenty of time to navigate the airport and find your gate. Arriving two hours ahead of international departures and an hour before domestic flights is the general travel rule.

  • Flying during a peak month like July? Major public holidays and other popular periods can result in longer lines at 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 St Louis Airport (STL) to Chiang Mai Airport (CNX)

  • The cheapest price we've seen for a one-way St Louis Airport to Chiang Mai Airport flight is Rs171,008. A return fare right now is Rs381,225. Depending on the availability and when you book, these fares may change.

  • Don't leave everything to the last moment. You're more likely to get cheap tickets from STL to CNX if you book in advance. Airlines often have some amazing early bird rates.

  • The 'Whole month' tool shows you the cheapest flights from St Louis Airport to Chiang Mai Airport throughout the entire month. It's a good way to find a bargain if your travel dates aren't set in stone.

  • Getting your hands on cheap flights from STL to CNX is a breeze with Price Alerts. All you need to do is set up one of these automatic alerts and we'll get in touch as soon as a new deal comes up.

  • Tailor your trip using filters. Choose your departure and arrival times, airlines and total journey duration. You can also sort your results by 'Cheapest,' 'Fastest' or 'Best' flights from St Louis Airport to Chiang Mai Airport.

Handy information about St Louis Airport (STL)

Arriving at Chiang Mai Airport (CNX)

  • Consider booking a hotel near CNX if you're catching a late St Louis Airport to Chiang Mai Airport flight. Settle into one of these options and skip the long transfer after landing:

  • Pick up a Chiang Mai Airport rental car and explore Chiang Mai and beyond with your own set of wheels. Chic Car Rent, asap car rental and Hertz are well-known companies to choose from here.

  • To secure the lowest price, book your vehicle from Chiang Mai Airport about two weeks before you travel.

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

  • Chiang Mai Airport is roughly 3 kilometres from the centre of Chiang Mai. The drive time takes around 15 minutes.

  • Getting there on public transport will take you roughly 25 minutes.

When to fly to Chiang Mai Airport (CNX)

  • The quietest month for a flight from St Louis Airport to Chiang Mai Airport is June, while January is the most popular. Pick the best time to visit Chiang Mai based on whether you prefer a laid-back vibe or a more bustling atmosphere.

  • Book your flight from St Louis Airport to Chiang Mai Airport for April if you want to explore Chiang Mai during its warmest month. Expect temperatures of between 22ºC and 42ºC.

  • Look for cheap tickets from STL to CNX in January if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between 12ºC and 31ºC on average.

Explore more of Thailand

  • Udon Thani is just one of the many cities in Thailand waiting to be discovered once you've seen the sights of Chiang Mai. Around 434 kilometres away to the east, check out popular attractions including Thai-Chinese Cultural Centre, Wat Pho Chai and Wat Burapa Wanaram.

  • Lampang is another essential stop in Thailand and is around 80 kilometres south-east of Chiang Mai. No trip is complete without seeing Wat Chiang Rai, Wat Phra Kaew Don Tao Suchadaram and Wat Chai Mongkhon.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.