Cheap Flight Tickets from St Louis (STL) to Philadelphia (PHL), Starting at $261

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

$269

WN Southwest Airlines • 1 stop • 6h 50m

Sep 02 – Sep 07

The cheapest round trip flight from St Louis to Philadelphia (STL-PHL-STL) is currently $269

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Cheapest Direct Flight

$261

WN Southwest Airlines • nonstop • 3h 30m

Sep 02

The cheapest nonstop flight from St Louis to Philadelphia (STL-PHL) is currently $261

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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

Southwest Airlines-WN

Southwest Airlines

Delta Airline, DL

Delta Airlines

Alaska Airlines -AS

Alaska Airlines

American Airlines, AA

American Airlines

United Airlines, UA

United Airlines

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 02 - Sep 07, Economy
WN
St Louis → Philadelphia
6h 50m
12:50 PM - 6:00 PM • 1 stop
WN
St Louis → Philadelphia
8h 35m
5:55 AM - 10:10 AM • 1 stop
$269
Southwest Airlines
Sep 02 - Sep 07, Economy
WN
St Louis → Philadelphia
6h 40m
4:45 PM - 9:45 PM • 1 stop
WN
St Louis → Philadelphia
7h 15m
12:45 PM - 4:20 PM • 1 stop
$269
Southwest Airlines
Sep 02 - Sep 07, Economy
DL
St Louis → Philadelphia
9h 6m
11:13 AM - 5:59 PM • 1 stop
DL
St Louis → Philadelphia
7h 12m
6:05 AM - 9:37 AM • 1 stop
$314
Delta Airlines
Sep 02 - Sep 07, Economy
AS
St Louis → Philadelphia
37h 28m
6:08 PM - 5:56 PM • 2 stops
AS
St Louis → Philadelphia
33h 42m
6:59 PM - 2:21 PM • 1 stop
$518
Alaska Airlines
Sep 02 - Sep 07, Economy
AS
St Louis → Philadelphia
30h 24m
10:16 AM - 5:40 AM • 2 stops
AS
St Louis → Philadelphia
38h 31m
6:59 PM - 5:10 PM • 2 stops
$600
Alaska Airlines
Sep 02 - Sep 07, Economy
AS
St Louis → Philadelphia
36h 44m
6:36 AM - 5:40 AM • 2 stops
AS
St Louis → Philadelphia
29h 17m
7:02 AM - 11:59 PM • 1 stop
$631
Alaska Airlines

Fly from St Louis to Philadelphia with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from St Louis to Philadelphia? Find the biggest savings on one-way and round-trip tickets right here.

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 6:00 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 DL : USD 314
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 6:40 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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