Cheap ONT to St. Louis flights

Book your ONT to STL flights with Expedia and find last-minute Ontario to St. Louis airfare. Expedia offers discount airfare on multiple airline carriers that fly direct and indirect routes between ONT and STL, with new flight deals and promotions almost daily. When you book your next trip from Ontario Intl. 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!

ONT to STL Route Map

Ontario to St. Louis Flights, Stats and Airplanes

Route information for flights from Ontario Intl. to Lambert St. Louis Intl..

Distance:
1,542.52 miles

ONT - Ontario Intl. Airlines

Browse the most popular airlines servicing the Ontario (ONT) 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.

Interesting Facts About Flights from Ontario to St. Louis (ONT to STL)

  • There were 99 passengers that flew from Ontario to St. Louis in 2009.

(Source: FAA & BTS 2009 Databases)