Cheap Flights from Philadelphia International (PHL) to St Louis (STL)

How to find cheap flights to St Louis (STL) from Philadelphia (PHL) in 2024

Looking for cheap tickets from Philadelphia International to St Louis? Round-trip tickets start from $168 and one-way flights to St Louis from Philadelphia International start from $28

Here are a few tips on how to secure the best flight price and make your journey as smooth as possible.

• Simply hit "search." From American Airlines to international carriers like Emirates, we compare all major airlines along with the most popular online travel agents to find the cheapest plane tickets from Philadelphia to St Louis. And with us, there are no hidden fees – what you see is what you pay.
• Compare flight deals to St Louis from Philadelphia from over 1,000 providers. Then choose the cheapest or fastest plane tickets. Flight tickets to St Louis start from $28 one-way.
• Flex your dates to find the best PHL–STL ticket prices. If you are flexible when it comes to your travel dates, use Skyscanner's "Whole month" tool to find the cheapest month, and even day to fly to St Louis from Philadelphia International.
• Set up a Price Alert. You can easily track the fare of your cheap Philadelphia-St Louis flights by creating an alert. Whenever prices go up or down, you'll get an email or push notification to help make sure you get the best possible flight deal.
• Fly without stops. Only interested in direct flights between Philadelphia International and St Louis? Make sure to check "Direct flights only" when performing a search. If there are direct flights available on the route, these will appear in the results. Airlines that fly direct include: American Airlines
  Southwest Airlines
  Qatar Airways
  Republic Airways
  Iberia
  British Airways
  Aer Lingus
  Frontier Airlines
• Find the cheapest Business class flights from Philadelphia International and St Louis. We scour the Internet for the best Business, Premium Economy and First Class flight fares to St Louis, too. Check the difference in price as you search – you might just chance upon a last-minute deal. Note that not all cabin classes are available for every destination or airline.
• Flexible on when you travel? The cheapest month to fly from Philadelphia International to St Louis is October.
• Include nearby airports in your search. Widen your search for Philadelphia International to St Louis flight deals by selecting the "add nearby airports" option. This will allow you to see flight prices for all the nearest airports at your departure point and your destination and could help you save next time you travel.
• Search for cheap flights regardless of where you are. To get the best flight booking experience when out and about, download the app and search for plane tickets between Philadelphia International and St Louis whenever you want.

Combine your flight to St Louis from Philadelphia International with hotels and car rental

Once you've secured your cheap flight ticket from Philadelphia International to St Louis, discover the best prices and exclusive rates for hotels in St Louis or nearby. You can also compare hundreds of car rental companies all at once so you get the best car rental price for your trip.