$42 Find Cheap Flights from St. Louis to Philadelphia - Compare and Save

If you’re traveling with a pet through Philadelphia International Airport, please ensure that they remain in a safe carrier unless you’re using the pet relief areas. The pet relief areas at PHL are located at multiple points around the airport, including inside the terminals, in the departure areas, and the arrivals areas. For arriving passengers, the most conveniently-located relief areas can be found adjacent to Terminals A-East, Terminal B past baggage claim, and Terminal E along the Commercial Vehicle Roadway.

There are multiple ways through which you can get to STL from the city center. The most popular method and also the most pocket-friendly would be using the metro, which can be boarded from the Civic Center. However, that isn’t the quickest. If you want to get to the airport within a shorter period, taking a taxi or driving via the I-64 W and I-170 N would be more ideal. This will take you about 15 minutes, while the metro will be 40 minutes on a good day.

At the moment, the only airline with a lounge at STL is American Airlines. They have an American Airlines Admirals Club located in Terminal 1 between Concourses B and C near Gate 1. Here you can find complimentary snacks and beverages, comfortable seats, TVs, and Wi-Fi. It is worth mentioning that the airport has other lounges: The USO Lounge and Wingtips Lounge, located in Concourse E on Terminal 2 near Gate E22.

You can get to downtown Philly from PHL using multiple means, such as taxis, rental cars, airport shuttle, and public transit. For convenience, taxis and rental cars are a better choice since they are easily available at the airport and will take you to any destination in Philly. However, they are significantly more expensive compared to public transport.

Among airlines operating St. Louis to Philadelphia flights:

• American Airlines: offers extra legroom; offers free seat selection
• Southwest: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

2 airlines operate flights between St. Louis and Philadelphia. The airlines offering nonstop flights on this route include:

• American Airlines
• Southwest

Flights from St. Louis to Philadelphia usually depart from Lambert-St Louis (STL) and arrive at Philadelphia (PHL).

Here are some options for this route, based on selected ticket types and cabin classes:

• American Airlines: a cabin bag and a checked bag in Economy Class
• Southwest: a cabin bag in Economy Class class
• JetBlue: a cabin bag in Economy Class class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Two cabin classes are available on flights from St. Louis to Philadelphia:

• Economy Class
• First Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $215 round-trip via Atlanta Hartsfield-Jackson (ATL), compared to $451 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Airbus A319 family is used most often on this route, operated mainly by American Airlines. Other aircraft seen on the route include Boeing 737 MAX 8 variants.

One-stop flights from St. Louis to Philadelphia most commonly connect through:

• Orlando (MCO) - 50% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 26% of one-stop connections
• Chicago O'Hare Intl (ORD) - 13% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 9% of one-stop connections

Orlando (MCO) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 23% on the St. Louis to Philadelphia route. Tuesday is the cheapest departure day at $370 round-trip on average, while Sunday is the most expensive at $479, a difference of $109. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Morning is the busiest departure period on St. Louis to Philadelphia flights, with 50% of flights leaving in that window. Afternoon departures account for 25%, evening flights for 25%, and night flights for 0%.

Some of the most popular sights in Philadelphia are Philadelphia Convention Center, Rittenhouse Square and Philadelphia Stadium. These are among the most viewed places in Philadelphia on KAYAK.

These are the earliest and latest flight times available from St. Louis to Philadelphia:

• Earliest: departs at 6:00 am and lands at 8:16 am
• Latest: departs at 9:00 pm and lands at 11:16 pm.

The flight takes about 2h 16m.

Last-minute fares on this route - booked within 2 weeks of departure - run 42% above the route average of $437. Book 5 weeks before departure for the lowest fares.

A nonstop flight from St. Louis to Philadelphia takes 2h 16m, covering 811 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

One-way fares from St. Louis to Philadelphia are currently lower than usual. Average one-way flight prices are about $105, which is 64% below the typical average for this route.

Flying via Chicago O'Hare Intl (ORD) gives the shortest average 1-stop total travel time at 5h 04m, compared with 5h 45m via Detroit Metropolitan Wayne County (DTW) and 10h 37m via Atlanta Hartsfield-Jackson (ATL).

Philadelphia is 1 hour ahead of St. Louis (Eastern Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

Philadelphia Airport (PHL) hosts 5 major car rental companies, with daily rates starting from around $28 for economy cars. Top options include:
• Payless
• Dollar
• Hertz
• Thrifty
• Budget

Round-trip flights from St. Louis to Philadelphia range from $334 to $526, with an average of $437 over the past 12 months. Anything below $334 counts as a good deal.

Two airlines offer in-flight Wi-Fi on St. Louis to Philadelphia flights:

• • American Airlines
• • JetBlue