STL - CNX

$1,154 Find Cheap Flights from St. Louis to Chiang Mai - Compare and Save

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Everything you should know

Cheapest round-trip
$1,154
Typical prices: $1,180-$1,964
Korean Air
Thu 2/8Sat 2/17
STL - CNX • 2 stops
When to travel
September
Cheapest • 33% price drop
June
Most popular
Good to know
+1
Good to know
+1
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Flight Deals

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

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Chiang Mai

Mon, Feb 8 - Wed, Feb 17
Korean Air Logo
6:00 am - 10:45 pmSTL  Lambert-St Louis-CNX Chiang Mai
27h 45m2 stops Atlanta Hartsfield-Jackson Incheon Intl
Korean Air Logo
12:20 am - 2:43 pmCNX  Chiang Mai-STL Lambert-St Louis
27h 23m2 stops Incheon Intl Atlanta Hartsfield-Jackson
$1,154Korean Air
Tue, Dec 1 - Thu, Dec 3
Korean Air Logo
7:03 am - 10:45 pmSTL  Lambert-St Louis-CNX Chiang Mai
26h 42m2 stops Atlanta Hartsfield-Jackson Incheon Intl
Korean Air Logo
12:20 am - 1:28 pmCNX  Chiang Mai-STL Lambert-St Louis
26h 08m2 stops Incheon Intl Atlanta Hartsfield-Jackson
$1,204Korean Air
Tue, Jan 12 - Thu, Jan 28
Multiple Airlines Logo
9:58 am - 6:25 amSTL  Lambert-St Louis-CNX Chiang Mai
31h 27m2 stops Boston Logan Intl Abu Dhabi Zayed Intl
Multiple Airlines Logo
9:10 am - 1:30 pmCNX  Chiang Mai-STL Lambert-St Louis
41h 20m2 stops Abu Dhabi Zayed Intl Charlotte Douglas
$1,207Multiple Airlines
Tue, Jan 12 - Thu, Jan 28
Multiple Airlines Logo
9:52 am - 6:25 amSTL  Lambert-St Louis-CNX Chiang Mai
31h 33m2 stops Boston Logan Intl Abu Dhabi Zayed Intl
Multiple Airlines Logo
9:10 am - 1:13 pmCNX  Chiang Mai-STL Lambert-St Louis
41h 03m2 stops Abu Dhabi Zayed Intl Charlotte Douglas
$1,207Multiple Airlines
Sun, Jan 10 - Wed, Feb 10
STARLUX Airlines Logo
2:28 pm - 4:00 pmSTL  Lambert-St Louis-CNX Chiang Mai
36h 32m2 stops Phoenix Sky Harbor Intl Taipei City Taiwan Taoyuan Intl
STARLUX Airlines Logo
5:00 pm - 11:51 pmCNX  Chiang Mai-STL Lambert-St Louis
43h 51m2 stops Taipei City Taiwan Taoyuan Intl Phoenix Sky Harbor Intl
$1,214STARLUX Airlines
Wed, Jan 6 - Sat, Feb 6
Etihad Airways Logo
8:13 am - 6:25 amSTL  Lambert-St Louis-CNX Chiang Mai
33h 12m2 stops Charlotte Douglas Abu Dhabi Zayed Intl
Etihad Airways Logo
9:10 am - 5:48 pmCNX  Chiang Mai-STL Lambert-St Louis
45h 38m2 stops Abu Dhabi Zayed Intl Charlotte Douglas
$1,285Etihad Airways
Sun, Jan 10 - Thu, Feb 11
China Airlines Logo
3:54 pm - 10:25 amSTL  Lambert-St Louis-CNX Chiang Mai
29h 31m2 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl
China Airlines Logo
11:25 am - 11:44 pmCNX  Chiang Mai-STL Lambert-St Louis
49h 19m2 stops Taipei City Taiwan Taoyuan Intl Seattle/Tacoma Intl
$1,307China Airlines
Sun, Jan 10 - Thu, Feb 11
Qatar Airways Logo
1:15 pm - 9:25 amSTL  Lambert-St Louis-CNX Chiang Mai
31h 10m3 stops Philadelphia Doha Hamad Intl Bangkok Suvarnabhumi
Qatar Airways Logo
7:45 pm - 9:08 pmCNX  Chiang Mai-STL Lambert-St Louis
38h 23m3 stops Bangkok Suvarnabhumi Doha Hamad Intl Chicago O'Hare Intl
$1,540Qatar Airways
Sun, Jan 10 - Wed, Feb 10
Qatar Airways Logo
1:05 pm - 1:45 pmSTL  Lambert-St Louis-CNX Chiang Mai
35h 40m3 stops Philadelphia Doha Hamad Intl Bangkok Suvarnabhumi
Qatar Airways Logo
7:45 pm - 9:08 pmCNX  Chiang Mai-STL Lambert-St Louis
38h 23m3 stops Bangkok Suvarnabhumi Doha Hamad Intl Chicago O'Hare Intl
$1,550Qatar Airways
Mon, Jan 11 - Wed, Feb 10
Qatar Airways Logo
6:00 am - 11:20 amSTL  Lambert-St Louis-CNX Chiang Mai
40h 20m3 stops Philadelphia Doha Hamad Intl Bangkok Suvarnabhumi
Qatar Airways Logo
7:45 pm - 9:08 pmCNX  Chiang Mai-STL Lambert-St Louis
38h 23m3 stops Bangkok Suvarnabhumi Doha Hamad Intl Chicago O'Hare Intl
$1,613Qatar Airways
Booking Insights

Price, demand and travel trends for St. Louis to Chiang Mai flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from St. Louis to Chiang Mai?

Round-trip flights from St. Louis to Chiang Mai typically range from $1,180 to $1,964. The lowest price found in the past 5 days was $1,154, on Korean Air.

What's the cheapest day of the week to fly from St. Louis to Chiang Mai?

Based on deals KAYAK users found in the last 12 months, Sunday is the cheapest day of the week to fly from St. Louis to Chiang Mai. It’s 27% cheaper than the average day, while Monday is the most expensive, with prices 29% higher.

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Key details for St. Louis to Chiang Mai flights

Low season

September

Cheapest flight

$1,154
Beat the crowds with an average 62% drop in travelers.
The most popular month to fly with an average 169% increase in travelers.
Round-trip flight from St. Louis to Chiang Mai

When to book flights from St. Louis to Chiang Mai

Are your dates flexible? Find out the best times to travel from St. Louis to Chiang Mai based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your St. Louis to Chiang Mai flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from St. Louis to Chiang Mai?

    Two cabin classes are available on flights from St. Louis to Chiang Mai:

    • Economy Class
    • Premium Economy Class

  • Do I need a passport to fly from St. Louis to Chiang Mai?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a St. Louis to Chiang Mai flight?

    Round-trip flights from St. Louis to Chiang Mai range from $1,180 to $1,964, with an average of $1,512 over the past 12 months. Anything below $1,180 counts as a good deal.

  • Have flight prices from St. Louis to Chiang Mai changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,154 to $2,640. That means the highest observed fare was about 2x higher than the lowest one.

  • What car rental options are available at Chiang Mai Airport (CNX)?

    Chiang Mai Airport (CNX) hosts 5 major car rental companies, with daily rates starting from around $12 for economy cars. Top options include:

    • Drive Car Rental
    • Alamo
    • Sixt
    • Hertz
    • Yesaway

  • Which airports can I use when flying from St. Louis to Chiang Mai?

    Flights from St. Louis to Chiang Mai usually depart from Lambert-St Louis (STL) and arrive at Chiang Mai (CNX).

  • Can I save money by using flexible dates for flights from St. Louis to Chiang Mai?

    Yes. Flexible dates can save you up to 44% on flights from St. Louis to Chiang Mai. Sunday is the cheapest departure day at $1,114 round-trip on average, while Monday is the most expensive at $1,964, a difference of $850.

    Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • What is the time difference between St. Louis and Chiang Mai?

    Chiang Mai is 12 hours ahead of St. Louis (Indochina Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Chiang Mai?

    Some of the most popular sights in Chiang Mai are Chiang Mai Night Bazaar, Tha Phae Gate and Chiang Mai International Exhibition and Convention Centre. These are among the most viewed places in Chiang Mai on KAYAK.

Your guide to booking St. Louis to Chiang Mai flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Sunday departure and avoid flying on Monday. On this route, Sunday flights average $1,114, about $850 less than Monday fares (43% savings) based on the last 12 months.
  • If you can choose when to travel, plan your St. Louis to Chiang Mai trip for September. Fares historically average $1,007 round-trip in that month - typically $957 less than the most expensive month, which is June (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Chiang Mai Airport.

    • Le Naview @Prasingh
    • Bodhi Serene, Chiang Mai
    • The Inside House

More options for your flight from St. Louis to Chiang Mai

Complete your trip to Chiang Mai with a hotel stay or car rental

Car rentals in Chiang Mai
Hotels in Chiang Mai
Vacations in Chiang Mai