
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $151 (Kiwi.com) |
One-way from | $73 (Trip.com) |
Popular in | May |
Cheapest in | August |
Average price | $432 |
Good round-trip deal | $386 or less |
Good one-way deal | $186 or less |
Fly from
Fly to
Route
Depart
Return
Price
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 4/29
7:56 pm-11:19 pm
1 stop28h 23m
Lambert-St Louis
Tue 5/5
4:55 pm-10:38 am
1 stop16h 43m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Mon 3/2
6:18 pm-11:59 pm
1 stop6h 41m
Lambert-St Louis
Thu 3/19
8:02 am-7:11 pm
1 stop10h 09m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 3/25
6:15 am-7:45 am
Nonstop2h 30m
Lambert-St Louis
Wed 3/25
6:50 pm-9:55 pm
Nonstop2h 05m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Sat 3/7
7:46 pm-5:57 am
1 stop11h 11m
Lambert-St Louis
Thu 3/12
9:05 pm-10:59 am
2 stops36h 54m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Tue 3/24
12:25 pm-8:00 pm
2 stops8h 35m
Lambert-St Louis
Wed 3/25
6:50 pm-9:55 pm
Nonstop2h 05m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Sat 3/14
6:15 am-7:45 am
Nonstop2h 30m
Lambert-St Louis
Mon 3/16
4:55 pm-11:35 pm
1 stop5h 40m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Tue 3/31
6:15 am-7:45 am
Nonstop2h 30m
Lambert-St Louis
Fri 4/3
7:40 pm-10:45 pm
Nonstop2h 05m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 3/25
6:15 am-7:45 am
Nonstop2h 30m
Lambert-St Louis
Sat 3/28
7:45 pm-10:50 pm
Nonstop2h 05m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Sat 3/14
6:15 am-7:45 am
Nonstop2h 30m
Lambert-St Louis
Tue 3/17
6:50 pm-9:55 pm
Nonstop2h 05m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Tue 3/24
6:15 am-7:45 am
Nonstop2h 30m
Lambert-St Louis
Fri 3/27
7:40 pm-10:45 pm
Nonstop2h 05m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
Booking 58 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, March is the cheapest month in which you can book a flight from Philadelphia to St. Louis (average of $68). Flying from Philadelphia to St. Louis in February is currently the most expensive (average of $260). 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 13% 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. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Comfort
Crew
Food
Overall
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Comfort
Crew
Food
Overall
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Comfort
Crew
Food
Overall
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Comfort
Crew
Food
Overall
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Comfort
Crew
Food
Overall
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Comfort
Crew
Food
Overall
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$95 | Average$178 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$128 | Average$215 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$237 | Average$413 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$253 | Average$419 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$259 | Average$366 | FlexibilityNo cancel fee | On-timeN/A |