Cheap flights from St. Louis to Buenos Aires from $509

Travelers frequently search for route combinations, such as St. Louis and Las Vegas, Cancún, Orlando, Los Angeles, San Francisco, Denver, Mexico City, Tuxtla Gutiérrez, Toronto, Ottawa, Lima, Cali, Sydney, Warsaw, San José, Washington, D.C., Reykjavik, Fort Lauderdale, Melbourne, Ontario.

Travelers frequently search for route combinations, such as Buenos Aires and Washington, D.C., Los Angeles, San Francisco, Atlanta, Miami, New York, El Calafate, Austin, Orlando, Boston, Puerto Iguazú, Honolulu, Minneapolis, Bariloche, Ushuaia, Mendoza, Cleveland, Chicago, Fort Lauderdale, Knoxville.

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

Currently, you can fly between St. Louis and Buenos Aires with Frontier Airlines, Avianca, LATAM Airlines, Copa Airlines, Volaris.

If you don’t have specific dates for your trip between St. Louis and Buenos Aires, 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 Buenos Aires, 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, MidAmerica St. Louis, Columbia Regional, Evansville Regional, Abraham Lincoln Capital, General Wayne A. Downing Peoria International, Quincy Regional, Central Illinois Regional, Cape Girardeau Regional, Waynesville-St. Robert Regional

This depends on the airline’s flight schedule. You can easily select your preferred departure time when you search on our website or mobile app. Choose the time of day you wish to depart from St. Louis, such as morning, afternoon, evening, or night, or select the exact hours for departure.

This depends on the airline’s flight schedule. You can easily select your preferred arrival time when you search on our website or mobile app. Choose the time of day you wish to arrive at Buenos Aires, such as morning, afternoon, evening, or night, or select the exact hours for arrival.