Cheap TRI to St. Louis flights

Book your TRI to STL flights with Expedia and find last-minute Tri-Cities to St. Louis airfare. Expedia offers discount airfare on multiple airline carriers that fly direct and indirect routes between TRI and STL, with new flight deals and promotions almost daily. When you book your next trip from Tri Cities Regional to Lambert St. Louis Intl. with Expedia, you can rest assured you’re getting great ticket prices and excellent service from one of the world’s most trusted travel providers.

Popular Flights from St. Louis, Missouri

Browse popular flight destinations from St. Louis (STL), and plan your next exciting trip. Expedia has cheap flights from St. Louis on multiple airline carriers, so book your next trip today!

TRI to STL Route Map

Tri-Cities to St. Louis Flights, Stats and Airplanes

Route information for flights from Tri Cities Regional to Lambert St. Louis Intl..

Distance:
463.04 miles

TRI - Tri Cities Regional Airlines

Browse the most popular airlines servicing the Tri-Cities (TRI) airport. Visit their flights pages to learn more about the most popular routes these carriers fly.

STL - Lambert St. Louis Intl. Airlines

Browse the most popular airlines servicing the St. Louis (STL) airport. Visit their flights pages to learn more about the most popular routes these carriers fly.