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Cheap Flights from Philadelphia to St. Louis $294.95

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Cheapest Flights from Philadelphia to St. Louis (PHL to STL)

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Interesting Facts About Flights from Philadelphia to St. Louis (PHL to STL)

Question : How long are most people's visits to Saint Louis when they fly in from Philadelphia?
Answer : Of course you're not most people, but if you were, you'd stay roughly five days.

Question : If having the most departure times is important to you, are there particular days that offer more options than others?
Answer : The day with the most departure times for this route is Wednesday with 106 options. Note that Saturday offers the least number of options with 44 flight times.

Question : What is the cheapest day to fly in the next four weeks?
Answer : Since low prices are preferred, look at January 3rd. As of December 5th, the cheapest ticket sales are coming in 36% below the average price for this route, so you can spend that extra cash on an adventure in Saint Louis.

Question : If you're booking PHL to STL, how many different options of departure times do you have on a daily basis?
Answer : On average, there are 20 options. That is lower than the global average of 31.