Cheap flights from St. Louis to Siem Reap from $638

Travelers frequently search for route combinations, such as St. Louis and Orlando, Las Vegas, Fort Lauderdale, Los Angeles, London, San Juan, Cancún, Denver, Reno, Seattle, San Francisco, New York, Washington, D.C., Amsterdam, Medellín, Oakland, Burbank, Beirut, Calgary, Charlotte.

Travelers frequently search for route combinations, such as Siem Reap and Bangkok, Ho Chi Minh City, Phnom Penh, Hanoi, Da Nang, Chiang Mai, Tampa, Nashville, Tulsa, Seattle, Philadelphia, Washington, D.C., Charlotte, Honolulu, Phuket City, Kuala Lumpur, Sihanoukville Province, Singapore, Krabi, Ko Samui.

The main airport in St. Louis is St. Louis Lambert International. It is also served by St. Louis Lambert International, Evansville Regional, Abraham Lincoln Capital, General Wayne A. Downing Peoria International, Central Illinois Regional, MidAmerica St. Louis, Williamson County Regional, Cape Girardeau Regional, Waynesville-St. Robert Regional, Decatur.

The main airport in Siem Reap is Siem Reap International. It is also served by Phnom Penh International.

Currently, you can fly between St. Louis and Siem Reap with Vietnam Airlines, Bangkok Airways, Qatar Airways, Thai AirAsia, Hawaiian Airlines.

If you don’t have specific dates for your trip between St. Louis and Siem Reap, you can enter a date range into the departure and return fields. Most carriers on the Kiwi.com website allow you to search and book up to six months from the day of your search. Order the search results by the best, cheapest, or fastest route, or find the cheapest outbound and return combination in the pricing table.

Traveling between St. Louis and Siem Reap, you can choose between direct (nonstop) flights or flights with one or more stops. You can select the number of stops on your journey, including an overnight stopover, and the duration of the stopover. What’s more, you can also select where you want to have your stopover. Want to say "Hi" to a friend in another city en route to your destination? Or fancy a quick round of shopping? Go Multi-City or Nomad and add places to your search that you wish to visit.

There are a number of airports in and around St. Louis. The main one is St. Louis Lambert International and other nearby airports include St. Louis Lambert International, Evansville Regional, Abraham Lincoln Capital, General Wayne A. Downing Peoria International, Central Illinois Regional, MidAmerica St. Louis, Williamson County Regional, Cape Girardeau Regional, Waynesville-St. Robert Regional, Decatur

There are a number of airports in and around Siem Reap. The main one is Siem Reap International and other nearby airports include Phnom Penh International.