Cheap flights from St. Louis from $19

Our data suggests that currently, the cheapest flights from St. Louis are being offered by Delta, Southern / Mokulele, and American Airlines. For example, Delta flights from St. Louis to Detroit Metropolitan Wayne County Airport, start at $41, Southern / Mokulele flights from St. Louis to Burlington, Iowa cost around $49, and American Airlines flights from St. Louis to Denver are around $50.

Currently, the cheapest flight from St. Louis found by our users is for $48 to Chicago Midway Airport. Prices will vary according to several factors such as the departure date and time, but on average you can expect to pay around $297 to travel from St. Louis to Chicago Midway Airport.

Chicago, Chicago O'Hare Intl Airport and Atlanta are currently the destinations served most frequently from St. Louis, with 46, 44 and 22 flights per day on average, respectively.

Airlines including American Airlines, Delta and United Airlines frequently fly from St. Louis. You can view other airlines by performing a quick search in the form above.

If you are looking for a cheap first class flight, consider flights to Denver, for which the starting price of a first class seat can be as low as $447.

Prices for flights from Lambert-St Louis Airport were last updated today.

As of October 2025, there are 42 operators available to choose from for flights from Lambert-St Louis Airport.

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport.

The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.