Popular airlines from Philadelphia International Airport (PHL) to Lambert-St. Louis International Airport (STL)
American AirlinesAmerican Airlines
DeltaDelta
UnitedUnited
Southwest AirlinesSouthwest Airlines
Frontier AirlinesFrontier Airlines
Spirit AirlinesSpirit Airlines
Alaska AirlinesAlaska Airlines
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Cheap flights from Philadelphia (PHL) to St. Louis (STL)
Prices were available within the past 7 days and start at CA $131 for one-way flights and CA $308 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Find the cheapest month to fly from Philadelphia (PHL) to St. Louis (STL)
September is typically the cheapest month to fly
Graph displaying average flight prices per month
Origin airport | Philadelphia Intl. |
Destination airport | Lambert-St. Louis Intl. |
Airlines serving | American Airlines, Delta, United |
Roundtrip price | CA $307 |
Distance | 1298 km |
Average flight time | 1 hour 28 mins |
Philadelphia to St. Louis Flights
The easy way to book your flights from Philadelphia to St. Louis
With Expedia, it’s simple to find and book flights to St. Louis from Philadelphia whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Lambert-St. Louis Intl., too.
Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Philadelphia to St. Louis today, tomorrow, or this week.
Save dollars with cheap flights from Philadelphia Intl., PHL to Lambert-St. Louis Intl., STL
Sort your search results by price to find great deals on your flight from Philadelphia to St. Louis—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to St. Louis from Philadelphia currently is just CA $308 rising to CA $419.
Here are more money-saving tips:
- Fly in August when flight prices are normally at their lowest
- Book about a month to 6 weeks before you travel for the best prices to St. Louis
- Avoid peak season and weekends when flights can cost more
- Early morning and late-night flights are sometimes cheaper, so try varying your travel times
- One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free!
Reasons to choose Expedia for your flight to St. Louis from Philadelphia
Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to St. Louis with Expedia today.
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