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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
$169
Southwest Airlines
• 1 stop
• 6h 45m
Sep 10 – Sep 10
The cheapest round trip flight from St Louis to Philadelphia (STL-PHL-STL) is currently $169
Cheapest Direct Flight
$154
Southwest Airlines
• nonstop
• 3h 30m
Sep 10
The cheapest nonstop flight from St Louis to Philadelphia (STL-PHL) is currently $154
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.
Sep 10 - Sep 10, Economy
St Louis → Philadelphia
6h 45m
6:05 AM - 11:10 AM • 1 stop
St Louis → Philadelphia
3h 45m
6:35 PM - 8:00 PM • nonstop
Southwest Airlines
Sep 10 - Sep 10, Economy
St Louis → Philadelphia
6h 45m
6:05 AM - 11:10 AM • 1 stop
St Louis → Philadelphia
25h 30m
5:25 PM - 7:55 AM • 2 stops
Southwest Airlines
Sep 09 - Sep 12, Economy
St Louis → Philadelphia
16h 50m
6:25 AM - 5:35 PM • 1 stop
St Louis → Philadelphia
30h 25m
2:15 PM - 7:40 AM • 2 stops
Southwest Airlines
Sep 09 - Sep 12, Economy
St Louis → Philadelphia
18h 40m
8:40 AM - 9:00 PM • 2 stops
St Louis → Philadelphia
30h 25m
2:15 PM - 7:40 AM • 2 stops
Southwest Airlines
Sep 09 - Sep 12, Economy
St Louis → Philadelphia
20h 25m
8:25 AM - 9:50 PM • 2 stops
St Louis → Philadelphia
30h 25m
2:15 PM - 7:40 AM • 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.
Sep 10 - Sep 10, Economy
St Louis → Philadelphia
3h 30m
10:20 AM - 1:30 PM • nonstop
St Louis → Philadelphia
3h 45m
6:35 PM - 8:00 PM • nonstop
Southwest Airlines
Sep 09 - Sep 12, Economy
St Louis → Philadelphia
3h 40m
6:30 AM - 9:50 AM • nonstop
St Louis → Philadelphia
3h 55m
8:54 AM - 10:29 AM • nonstop
American Airlines
Sep 09 - Sep 12, Economy
St Louis → Philadelphia
3h 43m
1:25 PM - 4:48 PM • nonstop
St Louis → Philadelphia
3h 55m
8:54 AM - 10:29 AM • nonstop
American Airlines
Sep 09 - Sep 12, Economy
St Louis → Philadelphia
3h 35m
6:40 PM - 9:55 PM • nonstop
St Louis → Philadelphia
3h 40m
11:55 AM - 1:15 PM • nonstop
Southwest Airlines
Sep 09 - Sep 12, Economy
St Louis → Philadelphia
3h 30m
10:55 AM - 2:05 PM • nonstop
St Louis → Philadelphia
3h 40m
11:55 AM - 1:15 PM • nonstop
Southwest 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 6:05 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 WN : USD 176
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 7:05 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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