St. Louis to Philadelphia - Flights Starting at US$34
Book one-way or return flights from St. Louis to Philadelphia from as little as US$34. Choose from the popular airlines below and book your flight today!
- One way
- Round-trip
- STL08:472h 14mDirectPHL12:01Wed, May 22|St. Louis - Philadelphia|Frontier AirlinesUS$34US$7052% OFF52% OFFUS$70US$34
- STL08:472h 14mDirectPHL12:01Wed, May 29|St. Louis - Philadelphia|Frontier AirlinesUS$37US$7047% OFF47% OFFUS$70US$37
- STL15:322h 13mDirectPHL18:45Wed, Jun 12|St. Louis - Philadelphia|Frontier AirlinesUS$38US$7046% OFF46% OFFUS$70US$38
- STL22:362h 14mDirectPHL01:50Wed, Jun 5|St. Louis - Philadelphia|Frontier AirlinesUS$38US$38
- STL11:472h 13mDirectPHL15:00Sat, Jun 8|St. Louis - Philadelphia|Frontier AirlinesUS$40US$40
- STL19:2310h 16m1 stopPHL06:39Thu, May 16|St. Louis - Philadelphia|Frontier AirlinesUS$49US$49
- STL20:048h 30m1 stopPHL05:34Sat, May 18|St. Louis - Philadelphia|Frontier AirlinesUS$49US$49
- STL20:048h 41m1 stopPHL05:45Sat, Apr 27|St. Louis - Philadelphia|Frontier AirlinesUS$49US$49
- STL20:048h 41m1 stopPHL05:45Sat, May 4|St. Louis - Philadelphia|Frontier AirlinesUS$51US$51
- STL21:538h 50m1 stopTTN07:43Wed, May 8|St. Louis - Philadelphia|Frontier AirlinesUS$51US$51
- STL13:003h 5mDirectPHL14:00Fri, May 3|St. Louis - Philadelphia|Frontier AirlinesFind More FlightsFind More Flights
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Discover different routes, airlines, and transfers and find the best alternative flights for your journey from St. Louis to Philadelphia.
- CheapestSTL08:472h 14mDirectPHL12:01St. Louis Lambert International Airport - Philadelphia International AirportWed, May 22Frontier AirlinesUS$34
- STL21:538h 50m1 transferTTN07:43St. Louis Lambert International Airport - Trenton Mercer AirportWed, May 8Frontier AirlinesUS$51
- STL21:538h 50m1 transferTTN07:43St. Louis Lambert International Airport - Trenton Mercer AirportWed, May 8Frontier AirlinesUS$51Find More Flights
Frequently Asked Questions
How to find a cheap flight from St. Louis to Philadelphia
Cheapest nonstop flight price | $33 |
---|---|
Cheapest round-trip ticket price | $75 |
Off-season for travel | May |
Peak season for travel | July |
Flight distance | 1,293.47km |
Average flight time | 2 hours 11 minutes |
Popular airline | American Airlines |
Plan Your Trip Around Philadelphia
More Travel Options | St. Louis to Philadelphia
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