Expect security screening at STL to take 5-10 minutes during off-peak times. Check real-time wait times online before heading to the airport.
Round-trip from | $110 (FlightHub) |
---|---|
One-way from | $53 (Cheapflightsfares) |
Popular in | March |
Cheapest in | August |
Average price | $226 |
Good round-trip deal | $480 or less |
Good one-way deal | $238 or less |
Fly from
Fly to
Route
Depart
Return
Price
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Sun 9/7
2:30 pm-10:18 pm
1 stop6h 48m
Philadelphia
Thu 9/11
6:45 am-1:35 pm
1 stop7h 50m
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Thu 8/14
6:00 am-9:18 am
Nonstop2h 18m
Philadelphia
Mon 8/18
7:05 pm-8:47 pm
Nonstop2h 42m
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Wed 8/13
8:15 am-11:25 am
Nonstop2h 10m
Philadelphia
Sat 8/16
2:45 pm-9:00 pm
1 stop7h 15m
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Thu 10/2
4:00 pm-12:54 am
1 stop7h 54m
Philadelphia
Mon 10/6
5:15 am-3:03 pm
1 stop10h 48m
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Fri 8/22
2:30 pm-8:49 pm
1 stop5h 19m
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Mon 9/8
7:50 am-11:00 am
Nonstop2h 10m
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Sat 8/9
7:29 pm-5:09 am
1 stop8h 40m
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Mon 8/4
6:10 am-9:26 am
Nonstop2h 16m
St. LouisPhiladelphia
STL - PHL
STLPHL
Lambert-St Louis
Wed 8/6
6:00 am-1:24 pm
1 stop6h 24m
The price you pay for your flight from St. Louis to Philadelphia may vary depending on when you book. For the best chance of a lower fare, look to book 65 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Currently, August is the cheapest month in which you can book a flight from St. Louis to Philadelphia (average of $236). Flying from St. Louis to Philadelphia in March is currently the most expensive (average of $295). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
It’s typically best to fly out from St. Louis to Philadelphia in the evening. Doing so could potentially save you 66% on the flight price compared to flying at noon, which is usually more expensive.
Travelers seeking maximum savings on their St. Louis to Philadelphia flight should consider departing on Monday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from STL to PHL are scheduled on a Monday (11 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
John,May 2025
PVD - BNA
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
John,May 2025
PVD - BNA
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
John,May 2025
PVD - BNA
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
John,May 2025
PVD - BNA
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
John,May 2025
PVD - BNA
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
John,May 2025
PVD - BNA
Airline | Cheapest | Average | Flexibility | On-time |
---|---|---|---|---|
Cheapest$52 | Average$148 | FlexibilityNo cancel fee | On-time62% | |
Cheapest$153 | Average$364 | FlexibilityNo cancel fee | On-time71% | |
Cheapest$196 | Average$376 | FlexibilityNo cancel fee | On-timeN/A | |
Cheapest$287 | Average$410 | FlexibilityNo cancel fee | On-time63% |