Cheap Flights from St. Louis to Philadelphia
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Flights from St. Louis to Philadelphia
Flight deals from St. Louis to Philadelphia
We've found these cheap flights for you. You can book one-way or return flight tickets.
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Round-trip
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One way
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Cheapest nonstop
STL 06:002h 7mNonstopPHL 09:07St. Louis - Philadelphia | Thu, Apr 3 | American Airlines
PHL 19:202h 38mNonstopSTL 20:58Philadelphia - St. Louis | Mon, Apr 7 | American AirlinesNZD 542 NZD 73026% OFF26% OFFNZD 730 NZD 542 -
STL 20:452h 5mNonstopPHL 23:50St. Louis - Philadelphia | Thu, Apr 3 | Southwest Airlines
PHL 19:202h 38mNonstopSTL 20:58Philadelphia - St. Louis | Mon, Apr 7 | American AirlinesNZD 570 NZD 73022% OFF22% OFFNZD 730 NZD 570 -
STL 16:576h 2m1 stopsTTN 23:59St. Louis - Philadelphia | Wed, Apr 2 | Frontier Airlines
PHL 16:168h 30m1 stopsSTL 23:46Philadelphia - St. Louis | Wed, Apr 9 | Frontier AirlinesNZD 275 NZD 73062% OFF62% OFFNZD 730 NZD 275 -
STL 17:4712h 49m1 stopsPHL 07:36St. Louis - Philadelphia | Mon, May 12 | Frontier Airlines
TTN 06:4518h 21m1 stopsSTL 00:06Philadelphia - St. Louis | Wed, May 14 | Frontier AirlinesNZD 27862% OFFNZD 730 NZD 278
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STL 18:519h 38m1 stopsPHL 05:29St. Louis - Philadelphia | Mon, Apr 7 | Frontier Airlines
PHL 16:168h 30m1 stopsSTL 23:46Philadelphia - St. Louis | Wed, Apr 9 | Frontier AirlinesNZD 28661% OFFNZD 730 NZD 286
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STL 16:5713h 35m1 stopsPHL 07:32St. Louis - Philadelphia | Sun, Apr 6 | Frontier Airlines
PHL 16:168h 30m1 stopsSTL 23:46Philadelphia - St. Louis | Tue, Apr 8 | Frontier AirlinesNZD 29560% OFFNZD 730 NZD 295
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STL 16:576h 2m1 stopsTTN 23:59St. Louis - Philadelphia | Thu, Apr 3 | Frontier Airlines
PHL 16:248h 22m1 stopsSTL 23:46Philadelphia - St. Louis | Mon, Apr 7 | Frontier AirlinesNZD 29560% OFFNZD 730 NZD 295
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STL 17:4718h 10m1 stopsTTN 12:57St. Louis - Philadelphia | Wed, May 14 | Frontier Airlines
PHL 16:338h 33m1 stopsSTL 00:06Philadelphia - St. Louis | Wed, May 21 | Frontier AirlinesNZD 30457% OFFNZD 730 NZD 304
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STL 17:4112h 51m1 stopsPHL 07:32St. Louis - Philadelphia | Wed, Apr 23 | Frontier Airlines
PHL 16:288h 36m1 stopsSTL 00:04Philadelphia - St. Louis | Sat, Apr 26 | Frontier AirlinesNZD 31256% OFFNZD 730 NZD 312
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STL 17:4712h 49m1 stopsPHL 07:36St. Louis - Philadelphia | Thu, May 8 | Frontier Airlines
PHL 16:338h 33m1 stopsSTL 00:06Philadelphia - St. Louis | Tue, May 13 | Frontier AirlinesNZD 31956% OFFNZD 730 NZD 319
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STL 17:4117h 50m1 stopsPHL 12:31St. Louis - Philadelphia | Tue, Apr 29 | Frontier Airlines
PHL 16:338h 33m1 stopsSTL 00:06Philadelphia - St. Louis | Sun, May 4 | Frontier AirlinesNZD 32655% OFFNZD 730 NZD 326
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STL 17:4712h 49m1 stopsPHL 07:36St. Louis - Philadelphia | Fri, May 9 | Frontier Airlines
PHL 16:338h 33m1 stopsSTL 00:06Philadelphia - St. Louis | Sun, May 11 | Frontier AirlinesNZD 33354% OFFNZD 730 NZD 333
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STL 13:0017h 25m1 stopsPHL Invalid DateSt. Louis - Philadelphia | Thu, Apr 3 | Normal Airline
PHL 15:006hNonstopSTL 16:00Philadelphia - St. Louis | Sat, Apr 5 | Normal AirlineFind More FlightsFind More Flights
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Cheapest nonstop
STL 20:452h 5mNonstopPHL 23:50St. Louis - Philadelphia | Mon, Apr 7 | Southwest AirlinesNZD 295 NZD 42330% OFF30% OFFNZD 423 NZD 295
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STL 07:452h 5mNonstopPHL 10:50St. Louis - Philadelphia | Fri, Apr 4 | Southwest AirlinesNZD 330 NZD 42322% OFF22% OFFNZD 423 NZD 330
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STL 18:519h 24m1 stopsPHL 05:15St. Louis - Philadelphia | Wed, Apr 2 | Frontier AirlinesNZD 101 NZD 42376% OFF76% OFFNZD 423 NZD 101
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STL 17:4112h 51m1 stopsPHL 07:32St. Louis - Philadelphia | Tue, Apr 29 | Frontier AirlinesNZD 14366% OFFNZD 423 NZD 143
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STL 18:3811h 9m1 stopsPHL 06:47St. Louis - Philadelphia | Mon, Apr 14 | Frontier AirlinesNZD 14566% OFFNZD 423 NZD 145
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STL 18:519h 40m1 stopsPHL 05:31St. Louis - Philadelphia | Fri, Apr 4 | Frontier AirlinesNZD 15663% OFFNZD 423 NZD 156
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STL 17:4717h 33m1 stopsPHL 12:20St. Louis - Philadelphia | Tue, May 13 | Frontier AirlinesNZD 15663% OFFNZD 423 NZD 156
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STL 17:4112h 51m1 stopsPHL 07:32St. Louis - Philadelphia | Thu, Apr 24 | Frontier AirlinesNZD 16262% OFFNZD 423 NZD 162
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STL 18:519h 40m1 stopsPHL 05:31St. Louis - Philadelphia | Sat, Apr 12 | Frontier AirlinesNZD 17657% OFFNZD 423 NZD 176
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STL 18:519h 40m1 stopsPHL 05:31St. Louis - Philadelphia | Sat, Apr 5 | Frontier AirlinesNZD 21250% OFFNZD 423 NZD 212
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STL 18:519h 38m1 stopsPHL 05:29St. Louis - Philadelphia | Mon, Apr 7 | Frontier AirlinesNZD 21749% OFFNZD 423 NZD 217
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STL 16:576h 2m1 stopsTTN 23:59St. Louis - Philadelphia | Tue, Apr 8 | Frontier AirlinesNZD 21848% OFFNZD 423 NZD 218
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STL 13:0017h 25m1 stopsPHL Invalid DateSt. Louis - Philadelphia | Thu, Apr 3 | Normal AirlineFind More FlightsFind More Flights
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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.
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Airlines Flying from St. Louis to Philadelphia
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FAQ
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When are flight tickets from St. Louis (STL) to Philadelphia (PHL) the cheapest?
Airlines adjust prices for flights from St. Louis to Philadelphia based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays. -
How much do flights from St. Louis (STL) to Philadelphia (PHL) cost?
According to Trip.com's data, the lowest price is around NZD 665. -
How long does it take to fly from St. Louis (STL) to Philadelphia (PHL) and what is the distance?
It takes around 2 hours 29 minutes to fly from St. Louis (STL) to Philadelphia (PHL). -
What are the most popular airlines that fly from St. Louis (STL) to Philadelphia (PHL)?
Airlines with flights from St. Louis (STL) to Philadelphia (PHL): American Airlines, Southwest Airlines, United Airlines, Qatar Airways, Aer Lingus, British Airways and Iberia.
How to find a cheap flight from St. Louis to Philadelphia
Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Philadelphia. Book your flights at the right time and save more.
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
Compare Flight Prices
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Look Out for Deals
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Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
Use the Trip.com App
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Flight Information from St. Louis to Philadelphia
| Cheapest one-way flight price | NZD 100 |
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| Cheapest round-trip ticket price | NZD 442 |
| Off-season for travel | March |
| Peak season for travel | June |
| Flight distance | 1,293.47 km |
| Average flight time | 2 hours 29 minutes |
| Popular airline | Delta Air Lines |