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Uncover the best deals on St Louis to Philadelphia flights by comparing fares from hundreds of airlines and agencies.
Good to Know: Cheapest and Fastest STL - PHL Flights
Useful information for finding best airline tickets from Lambert St Louis International to Philadelphia International on your next trip.
Cheapest Round Trip Flight
$289
Southwest Airlines
• 2 stops
• 22h 25m
Jul 17 – Jul 19
The cheapest round trip flight from St Louis to Philadelphia (STL-PHL-STL) is currently $289
Cheapest One way Flight
$119
American Airlines
• 1 stop
• 20h 42m
Jul 18
The cheapest one way flight from St Louis to Philadelphia (STL-PHL) is currently $119
Cheapest Direct Flight
$266
American Airlines
• nonstop
• 3h 37m
Jul 18
The cheapest nonstop flight from St Louis to Philadelphia (STL-PHL) is currently $266
Fastest Flight
3h 30m
The fastest nonstop flight from St Louis to Philadelphia (STL-PHL) takes 3h 30m
Top Airlines Flying from St Louis to Philadelphia
Latest Flight Deals from St Louis (STL) to Philadelphia (PHL)
Compare and book low fare round-trip air tickets from St Louis to Philadelphia. Ideal for travelers with confirmed return itineraries.
Jul 17 - Jul 19, Economy
St Louis → Philadelphia
22h 25m
8:05 PM - 10:50 AM • 2 stops
St Louis → Philadelphia
3h 40m
6:20 AM - 7:40 AM • nonstop
Southwest Airlines
Jul 17 - Jul 19, Economy
St Louis → Philadelphia
23h 55m
10:35 PM - 2:10 PM • 2 stops
St Louis → Philadelphia
3h 40m
6:20 AM - 7:40 AM • nonstop
Southwest Airlines
Jul 17 - Jul 19, Economy
St Louis → Philadelphia
25h 20m
9:50 PM - 2:10 PM • 2 stops
St Louis → Philadelphia
3h 40m
1:45 PM - 3:05 PM • nonstop
Southwest Airlines
Jul 17 - Jul 19, Economy
St Louis → Philadelphia
25h 25m
8:35 PM - 1:00 PM • 2 stops
St Louis → Philadelphia
3h 40m
6:20 AM - 7:40 AM • nonstop
Southwest Airlines
Jul 17 - Jul 19, Economy
St Louis → Philadelphia
33h 35m
8:10 PM - 5:25 PM • 2 stops
St Louis → Philadelphia
3h 40m
1:45 PM - 3:05 PM • nonstop
Southwest Airlines
Explore competitive one-way airfare options for STL - PHL flights. Best suited for flexible or open-ended travel plans.
Jul 18, Economy
St Louis → Philadelphia
20h 30m
10:25 AM - 11:55 PM • 2 stops
Southwest Airlines
Jul 18, Economy
St Louis → Philadelphia
11h 50m
12:50 PM - 9:00 PM • 2 stops
Southwest Airlines
Looking for the fastest way to Philadelphia? These direct flight options from STL to PHL offer both convenience and value—no layovers, just straight to your destination.
Jul 18 - Jul 19, Economy
St Louis → Philadelphia
3h 37m
11:18 AM - 2:35 PM • nonstop
St Louis → Philadelphia
3h 53m
9:59 PM - 11:32 PM • nonstop
American Airlines
Jul 18 - Jul 19, Economy
St Louis → Philadelphia
3h 30m
1:00 PM - 4:10 PM • nonstop
St Louis → Philadelphia
3h 40m
1:45 PM - 3:05 PM • nonstop
Southwest Airlines
Jul 18 - Jul 19, Economy
St Louis → Philadelphia
3h 40m
6:14 AM - 9:34 AM • nonstop
St Louis → Philadelphia
3h 58m
3:24 PM - 5:02 PM • nonstop
American Airlines
Jul 18 - Jul 19, Economy
St Louis → Philadelphia
3h 42m
5:48 PM - 9:10 PM • nonstop
St Louis → Philadelphia
3h 58m
3:24 PM - 5:02 PM • nonstop
American Airlines
FAQs on St Louis to Philadelphia Flights
What are the airports in St Louis?
STL
What’s the most popular airline flying from STL to PHL?
The most popular airline flying from St Louis to Philadelphia are
Can I fly from STL to PHL non-stop?
Yes, you can fly STL to PHL non-stop on
Which airlines fly nonstop between St Louis and Philadelphia?
The non-stop flights between St Louis and Philadelphia are .
What’s the earliest departure time from STL to PHL Airport?
The earliest flight leaves STL at 6:14 am and lands in PHL - Philadelphia International
What are the airports in Philadelphia?
PHL
Can I make changes to my St Louis to Philadelphia flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from STL to PHL?
Read the fare rules of the St Louis to Philadelphia air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from St Louis and Philadelphia?
operate flights between St Louis and Philadelphia
How long does a flight from St Louis to Philadelphia take?
It takes approximately 2 hour to fly non-stop from STL to PHL, which is 813.49 miles by air.
Which airlines provide the cheapest flights from St Louis (STL) to Philadelphia (PHL) ?
In the past couple of days, the cheapest tickets to PHL from STL were found on AA : USD 119
Do I need a passport to fly between STL and PHL?
No
What’s the latest departure time from STL to PHL ?
The last flight leaves STL at 10:35 pm
St Louis (STL) to Philadelphia (PHL): Airport Information
| Origin Airport | Lambert St Louis International , St Louis, US |
| Destination Airport | Philadelphia International , Philadelphia, US |
| Distance | 813 miles |
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