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

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How to find the cheapest flight from
St. Louis (STL) to Chiang Mai (CNX)

All the information you need to plan the best STL to CNX flight in 2022: compare St. Louis to Chiang Mai flight prices with the expected peak season, weather and rainfall in Chiang Mai.
What is the cheapest month to fly from St. Louis to Chiang Mai?

October can be a great time to fly to Chiang Mai from St. Louis with a flight ticket averaging about $1,164. Cheapflights users have found deals in the month of October for as cheap as $634. The most expensive prices can be found in the month of December.

When is the cheapest time to fly from St. Louis to Chiang Mai (STL - CNX)?

A simple way to save on the total cost of your ticket is to fly from St. Louis to Chiang Mai in the morning. If you’re flexible enough to do this you can expect to save up to 2% on your trip compared to booking a flight at noon.

What is the cheapest day to fly round-trip from St. Louis to Chiang Mai?

Wednesday flights are generally found to be more expensive for flights from St. Louis to Chiang Mai. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Chiang Mai.

Related info for your journey

Useful info, stats and facts about <span class="emphasized">St. Louis</span> to <span class="emphasized">Chiang Mai</span> flights.

Flight FAQs

From St. Louis to Chiang Mai

Which airlines flying from Lambert-St Louis to Chiang Mai have flexible cancellations due to COVID-19?

Some of the carriers operating flights from Lambert-St Louis to Chiang Mai that may be offering flexible cancellation policies are Delta and American Airlines. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

What are the cheapest flights from St. Louis to Chiang Mai?

Looking at all options, your cheapest flight can be booked for $1,707. While the most popular route (Lambert-St Louis - Chiang Mai) can be booked for $1,577 on average our data indicates $1,707 when flying from St. Louis to Chiang Mai.

COVID Restrictions

View COVID Travel Restrictions for Chiang Mai, Thailand

Do I need a COVID test to fly to Chiang Mai from St. Louis?

Information is based on travel restrictions from Lambert-St Louis to Chiang Mai

Most visitors from Lambert-St Louis need to provide a negative COVID-19 test result and/or quarantine to enter Chiang Mai.

COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) test taken 72 hours before departing to Chiang Mai.

Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Chiang Mai.

Documents
Thailand Pass - The Thailand Pass is a web-based system for Thai and foreign travelers to fill in their travel and health information and upload the related documents before travelling. This system is operational and will replace the COE system on 1 November, 2021. However, the COE will continue to be used for certain groups of travelers.

MorChana App - Alert application and contact tracing app to be used while in Thailand. Download via Apple Store or Google Play Store.


Do I need a test to fly back to St. Louis from Chiang Mai?

Returning to Lambert-St Louis from Chiang Mai

COVID-19 testing requirements
Visitors from Chiang Mai must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Lambert-St Louis.

Quarantine requirements
Visitors from Chiang Mai are not required to quarantine after entering Lambert-St Louis.

Hide COVID Travel Restrictions for Chiang Mai, Thailand

Alternative routes for St. Louis to Chiang Mai

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Chiang Mai

Things to know before you go - useful duration and weather info for your trip from St. Louis to Chiang Mai.
Today's exchange rate
$1 = ฿33.14
Average temperature for January in Chiang Mai
86.0 °F
Avg rainfall for January in Chiang Mai
0.2 ″

Airports servicing St. Louis

Airports servicing Chiang Mai

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