Southwest offers free snacks and non-alcoholic beverages, enhancing the flight experience.
Enjoy free messaging and in-flight entertainment streamed to your device.
Most accurate provider | FlightHub 3 stars |
---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $288 (Cheapflightsfares) |
One-way from | $89 (Frontier) |
Popular in | April |
Cheapest in | July |
Average price | $347 |
Good round-trip deal | $357 or less |
Good one-way deal | $188 or less |
Fly from
Fly to
Route
Depart
Return
Price
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 5/21
7:14 pm-8:58 pm
Nonstop2h 44m
Lambert-St Louis
Sat 5/24
6:20 am-9:31 am
Nonstop2h 11m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Thu 7/17
5:30 am-1:34 pm
1 stop9h 04m
Lambert-St Louis
Sun 7/20
2:36 pm-12:35 am
1 stop8h 59m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Sun 7/6
7:05 am-5:04 pm
1 stop10h 59m
Lambert-St Louis
Sun 7/27
8:44 am-5:10 pm
1 stop7h 26m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 6/4
7:00 am-9:15 am
1 stop27h 15m
Lambert-St Louis
Fri 6/6
9:50 am-9:34 pm
3 stops34h 44m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 5/21
6:00 am-9:35 am
1 stop4h 35m
Lambert-St Louis
Wed 5/21
3:40 pm-10:55 pm
1 stop6h 15m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 5/21
5:50 am-9:10 am
1 stop4h 20m
Lambert-St Louis
Sat 5/24
5:45 am-3:45 pm
2 stops9h 00m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Wed 6/4
10:35 am-9:25 pm
2 stops11h 50m
Lambert-St Louis
Wed 6/11
6:30 am-2:24 pm
1 stop6h 54m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Mon 5/5
4:33 pm-12:06 am
1 stop8h 33m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Sun 6/22
7:05 am-5:04 pm
1 stop10h 59m
PhiladelphiaSt. Louis
PHL - STL
PHLSTL
Philadelphia
Sun 6/1
4:00 pm-6:41 pm
2 stops27h 41m
Provider | Price Accuracy | Trust Score* |
---|---|---|
Price Accuracy1 star | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*2 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy2 stars | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*2 stars | |
Price Accuracy- | Trust Score*1 star |
Booking 86 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 23% 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 evenings 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.
The most flights from PHL to STL are scheduled on a Monday (8 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).
In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.
If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).
Boarding
Overall
Entertainment
Crew
Comfort
Food
Reviews
James,Apr 2025
LAX - SFO
Boarding
Overall
Entertainment
Crew
Comfort
Food
Reviews
James,Apr 2025
LAX - SFO
Boarding
Overall
Entertainment
Crew
Comfort
Food
Reviews
James,Apr 2025
LAX - SFO
Boarding
Overall
Entertainment
Crew
Comfort
Food
Reviews
James,Apr 2025
LAX - SFO
Boarding
Overall
Entertainment
Crew
Comfort
Food
Reviews
James,Apr 2025
LAX - SFO
Boarding
Overall
Entertainment
Crew
Comfort
Food
Reviews
James,Apr 2025
LAX - SFO
Airline | Cheapest | Average | Flexibility | On-time |
---|---|---|---|---|
Cheapest$53 | Average$90 | FlexibilityNo cancel fee | On-time62% | |
Cheapest$131 | Average$303 | FlexibilityNo cancel fee | On-time71% | |
Cheapest$199 | Average$318 | FlexibilityNo cancel fee | On-timeN/A | |
Cheapest$274 | Average$417 | FlexibilityNo cancel fee | On-time63% |