
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $257 (American Airlines) |
One-way from | $70 (Frontier) |
Popular in | May |
Cheapest in | September |
Average price | $434 |
Good round-trip deal | $366 or less |
Good one-way deal | $200 or less |
Fly from
Fly to
Route
Depart
Return
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 6/3
11:35 am-7:15 pm
2 stops8h 40m
Lambert-St Louis
Wed 6/10
10:15 am-9:20 pm
2 stops10h 05m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 5/20
8:05 am-12:20 pm
1 stop5h 15m
Lambert-St Louis
Thu 5/28
6:04 pm-11:07 pm
1 stop4h 03m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Tue 5/19
6:35 pm-8:00 pm
Nonstop2h 25m
Lambert-St Louis
Sun 5/24
6:00 pm-9:10 pm
Nonstop2h 10m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Fri 5/22
2:15 pm-10:55 pm
2 stops9h 40m
Lambert-St Louis
Tue 5/26
7:35 am-5:50 pm
2 stops9h 15m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Fri 5/29
12:20 pm-1:45 pm
Nonstop2h 25m
Lambert-St Louis
Sun 5/31
3:15 pm-6:25 pm
Nonstop2h 10m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Fri 5/15
2:23 pm-5:56 pm
1 stop4h 33m
Lambert-St Louis
Tue 5/19
5:15 pm-12:57 am
1 stop6h 42m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Thu 6/25
6:00 pm-7:35 pm
Nonstop2h 35m
Lambert-St Louis
Mon 6/29
8:40 pm-11:50 pm
Nonstop2h 10m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Thu 6/18
6:00 pm-7:35 pm
Nonstop2h 35m
Lambert-St Louis
Mon 6/22
8:40 pm-11:50 pm
Nonstop2h 10m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Fri 6/26
6:00 pm-7:35 pm
Nonstop2h 35m
Lambert-St Louis
Mon 6/29
3:35 pm-9:50 pm
1 stop5h 15m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Mon 6/1
12:45 pm-6:55 pm
2 stops7h 10m
Lambert-St Louis
Wed 6/3
12:40 pm-10:00 pm
2 stops8h 20m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
Booking 57 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, September is the cheapest month in which you can book a flight from Philadelphia to St. Louis (average of $314). Flying from Philadelphia to St. Louis in May is currently the most expensive (average of $470). 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 in the afternoon. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight at noon.
Travelers seeking maximum savings on their Philadelphia to St. Louis flight should consider departing on Saturday afternoons 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.
Comfort
Entertainment
Food
Overall
Crew
Boarding
Reviews
Dominic,Mar 2026
MCO - SMF
Comfort
Entertainment
Food
Overall
Crew
Boarding
Reviews
Dominic,Mar 2026
MCO - SMF
Comfort
Entertainment
Food
Overall
Crew
Boarding
Reviews
Dominic,Mar 2026
MCO - SMF
Comfort
Entertainment
Food
Overall
Crew
Boarding
Reviews
Dominic,Mar 2026
MCO - SMF
Comfort
Entertainment
Food
Overall
Crew
Boarding
Reviews
Dominic,Mar 2026
MCO - SMF
Comfort
Entertainment
Food
Overall
Crew
Boarding
Reviews
Dominic,Mar 2026
MCO - SMF
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$93 | Average$178 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$135 | Average$226 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$239 | Average$415 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$251 | Average$436 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$297 | Average$442 | FlexibilityNo cancel fee | On-timeN/A |