Cheap flights from Philadelphia to St. Louis from $103

Travelers frequently search for route combinations, such as Philadelphia and Mexico City, Fort Lauderdale, Orlando, Atlanta, Miami, San Juan, Chicago, Tampa, Dallas, Nashville, Las Vegas, Cancún, Los Angeles, Houston, Charlotte, Santo Domingo, Guadalajara, Bogotá, New Orleans, Denver.

Travelers frequently search for route combinations, such as St. Louis and Denver, Orlando, Las Vegas, Los Angeles, London, Dallas, Fort Lauderdale, Bogotá, Mexico City, Tokyo, Frankfurt, Cebu, San Francisco, Athens, Amsterdam, Naples, Cancún, Portland, Washington, D.C., San Diego.

Philadelphia is mainly served by Philadelphia International. But there are other airports nearby, including Wings Field.

The main airport in Philadelphia is Philadelphia International. It is also served by John F. Kennedy International, Newark Liberty International, Washington Dulles International, LaGuardia, Baltimore–Washington International, Ronald Reagan Washington National, Westchester County, Lehigh Valley International, New York Stewart International Airport, Atlantic City International.

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

Currently, you can fly between Philadelphia and St. Louis with Frontier Airlines, United Airlines, Spirit Airlines, Southern Airways Express, JetBlue Airways.

If you don’t have specific dates for your trip between Philadelphia and St. Louis, 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 Philadelphia and St. Louis, 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 Philadelphia. The main one is Philadelphia International and other nearby airports include John F. Kennedy International, Newark Liberty International, Washington Dulles International, LaGuardia, Baltimore–Washington International, Ronald Reagan Washington National, Westchester County, Lehigh Valley International, New York Stewart International Airport, Atlantic City International