Cheap flights from Philadelphia, PA to St. Louis, MO

Travelers frequently search for route combinations, such as Philadelphia and Orlando, Atlanta, Las Vegas, Denver, Miami, Tampa, San Juan, Los Angeles, New Orleans, Dallas, Fort Myers, Charlotte, Austin, San Diego, Nashville, Houston, Jacksonville, Phoenix, Fort Lauderdale, San Francisco.

Travelers frequently search for route combinations, such as St. Louis and Los Angeles, Denver, Las Vegas, Atlanta, San Francisco, Orlando, Minneapolis, San Diego, Phoenix, Sacramento, Seattle, Houston, New York, Fort Lauderdale, Washington, D.C., Salt Lake City, San Jose, Oakland, Portland, Fresno.

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 Newark Liberty International, Washington Dulles International, Baltimore–Washington International, LaGuardia, New York Stewart International Airport, Ronald Reagan Washington National, Atlantic City International, Lehigh Valley International, Westchester County, Harrisburg International.

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

Yes, it's possible to combine different modes of transport between Philadelphia and St. Louis thanks to our Virtual Interlining technology. Making use of not only flights but also trains and buses between Philadelphia and St. Louis can give rise to new adventures. Read more about how Virtual Interlining works on Kiwi.com Stories.

Virtual Interlining provides a revolutionary way of traveling. You can combine different modes of transport like flights, trains, and buses into one itinerary. And this often saves money. Thanks to the world's largest carrier database, the Kiwi.com search function enables anyone to mix and match different modes of transport easily.

Currently, you can fly between Philadelphia and St. Louis with United Airlines.

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.