Southwest offers free snacks and non-alcoholic beverages, enhancing the flight experience.
Enjoy free messaging and in-flight entertainment streamed to your device.
Round-trip from | $269 (Mytrip) |
---|---|
One-way from | $58 (Priceline) |
Popular in | May |
Cheapest in | August |
Average price | $271 |
Good round-trip deal | $348 or less |
Good one-way deal | $180 or less |
Fly from
Fly to
Route
Depart
Return
Price
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Fri 7/25
7:00 am-9:52 am
1 stop3h 52m
Lambert-St Louis
Fri 8/1
10:47 am-4:16 pm
3 stops28h 29m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 8/20
3:45 pm-5:10 pm
Nonstop2h 25m
Lambert-St Louis
Sun 8/24
7:32 am-2:46 pm
1 stop6h 14m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 7/9
5:30 pm-11:47 pm
1 stop7h 17m
Lambert-St Louis
Mon 7/14
5:40 pm-1:09 am
1 stop6h 29m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Mon 8/18
5:30 am-8:30 am
1 stop4h 00m
Lambert-St Louis
Wed 8/20
6:25 am-4:00 pm
2 stops8h 35m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Fri 7/25
7:00 am-9:52 am
1 stop3h 52m
Lambert-St Louis
Sun 7/27
5:40 pm-11:34 am
1 stop16h 54m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Sat 8/9
12:55 pm-8:25 pm
1 stop8h 30m
Lambert-St Louis
Tue 8/12
10:45 am-7:10 pm
1 stop7h 25m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Mon 9/1
5:40 am-12:56 pm
1 stop8h 16m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Thu 9/11
6:45 am-1:35 pm
1 stop7h 50m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Mon 9/29
3:50 pm-5:17 pm
Nonstop2h 27m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Tue 9/9
3:40 pm-9:25 pm
1 stop6h 45m
Booking 80 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Currently, August is the cheapest month in which you can book a flight from Philadelphia to St. Louis (average of $311). Flying from Philadelphia to St. Louis in March is currently the most expensive (average of $356). 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 optimal to fly from Philadelphia to St. Louis at noon. By choosing this option you can save up to 10% on the cost of your flight, compared to a flight in the morning.
Travelers seeking maximum savings on their Philadelphia to St. Louis flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Crew
Overall
Boarding
Comfort
Food
Entertainment
Reviews
John,May 2025
PVD - BNA
Crew
Overall
Boarding
Comfort
Food
Entertainment
Reviews
John,May 2025
PVD - BNA
Crew
Overall
Boarding
Comfort
Food
Entertainment
Reviews
John,May 2025
PVD - BNA
Crew
Overall
Boarding
Comfort
Food
Entertainment
Reviews
John,May 2025
PVD - BNA
Crew
Overall
Boarding
Comfort
Food
Entertainment
Reviews
John,May 2025
PVD - BNA
Crew
Overall
Boarding
Comfort
Food
Entertainment
Reviews
John,May 2025
PVD - BNA
Airline | Cheapest | Average | Flexibility | On-time |
---|---|---|---|---|
Cheapest$48 | Average$144 | FlexibilityNo cancel fee | On-time62% | |
Cheapest$180 | Average$374 | FlexibilityNo cancel fee | On-time71% | |
Cheapest$200 | Average$366 | FlexibilityNo cancel fee | On-timeN/A | |
Cheapest$280 | Average$416 | FlexibilityNo cancel fee | On-time63% |