PHL - STL

$80 Find Cheap Flights from Philadelphia to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to St. Louis departing on 4/23. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to St. Louis, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$160
Overall average: $422
Frontier
Fri 4/10Fri 4/17
PHL - STL • 1 stop
Cheapest non-stop
$314
Typical prices: $392-$571
Southwest
Wed 4/22Sat 4/25
PHL - STL • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Southwest's two free checked bags suit heavy packers.
Use MetroLink for easy access from Lambert-St Louis.
Expert advice
Expert advice
Expert advice
Expert advice
Nonstop flights
Every day
You can fly direct with American Airlines and Southwest. Average duration is 2h 35m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Orlando (MCO)
Cheapest • Avg $233 (round-trip)
Washington, D.C. (DCA)
Shortest trip • 4h 16m (one-way)
Insights
Insights
Insights
Insights
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 42% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
August
Cheapest • 20% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Flight Deals
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Expert advice
Flight Deals

Cheap Flights from Philadelphia to St. Louis (PHL-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to St. Louis

Fri, Apr 10 - Fri, Apr 17
Frontier Logo
8:25 pm - 9:48 am
PHL
-
STL
14h 23m
1 stop
Frontier Logo
8:06 pm - 5:34 am
STL
-
PHL
8h 28m
1 stop
$160Frontier
Thu, Apr 23 - Sun, Apr 26
Frontier Logo
5:05 am - 10:30 am
PHL
-
STL
6h 25m
1 stop
Frontier Logo
4:59 pm - 1:52 pm
STL
-
PHL
19h 53m
1 stop
$171Frontier
Thu, Apr 30 - Sun, May 3
Frontier Logo
10:38 pm - 11:19 pm
PHL
-
STL
25h 41m
1 stop
Frontier Logo
11:28 am - 10:48 pm
STL
-
PHL
10h 20m
1 stop
$181Frontier
Wed, Apr 22 - Sat, Apr 25
Frontier Logo
7:56 pm - 10:30 am
PHL
-
STL
15h 34m
2 stops
Frontier Logo
8:17 pm - 5:35 am
STL
-
PHL
8h 18m
1 stop
$191Frontier
Wed, Apr 29 - Tue, May 5
Frontier Logo
8:00 am - 11:19 pm
PHL
-
STL
16h 19m
1 stop
Frontier Logo
4:55 pm - 10:38 am
STL
-
PHL
16h 43m
1 stop
$192Frontier
Wed, Apr 22 - Sat, Apr 25
Multiple Airlines Logo
1:30 pm - 10:30 am
PHL
-
STL
22h 00m
2 stops
Multiple Airlines Logo
8:17 pm - 5:35 am
STL
-
PHL
8h 18m
1 stop
$193Multiple Airlines
Tue, Mar 17 - Fri, Mar 20
Frontier Logo
10:08 pm - 7:37 am
PHL
-
STL
10h 29m
1 stop
Frontier Logo
12:16 pm - 12:52 am
STL
-
PHL
11h 36m
1 stop
$195Frontier
Sun, Apr 12 - Mon, Apr 13
Frontier Logo
6:00 am - 9:48 am
PHL
-
STL
28h 48m
2 stops
Frontier Logo
8:19 pm - 5:31 am
STL
-
PHL
8h 12m
1 stop
$204Frontier
Thu, Mar 12 - Tue, Mar 17
Frontier Logo
8:25 pm - 9:49 am
PHL
-
STL
14h 24m
1 stop
Frontier Logo
4:51 pm - 11:41 am
STL
-
PHL
17h 50m
1 stop
$205Frontier
Fri, Apr 10 - Fri, Apr 17
Frontier Logo
8:25 pm - 9:48 am
PHL
-
STL
14h 23m
1 stop
Frontier Logo
4:59 pm - 8:10 am
STL
-
PHL
14h 11m
2 stops
$214Frontier
Booking Insights

KAYAK's insights & trends for Philadelphia to St. Louis flights

Get data-powered insights and trends into flights from Philadelphia to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Philadelphia to St. Louis?

The average price of all round-trip flights from Philadelphia to St. Louis clicked on KAYAK for each day over the last 12 months.

For Philadelphia to St. Louis, Wednesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from St. Louis back to Philadelphia, the best deals are generally found on Thursday, with Saturday being the most expensive.

What is the cheapest month to fly from Philadelphia to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Philadelphia to St. Louis is August, where tickets cost $320 (return) on average. On the other hand, the most expensive months are December and May, where the average cost of round-trip tickets is $467 and $455 respectively.

Can I save money by flying with a layover from Philadelphia to St. Louis?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $425, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Philadelphia to St. Louis?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Philadelphia to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Philadelphia to St. Louis, you should book around 4 weeks before departure, which saves you about 42% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Expert advice

Expert advice for your flight from Philadelphia to St. Louis

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on American Airlines and PHL

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Good to know

Low seasonJanuary
Cheapest flight$80
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly with an average 13% increase in price.
Flight from Philadelphia to St. Louis

When to book flights from Philadelphia to St. Louis

Are your dates flexible? Find out the best times to travel from Philadelphia to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Philadelphia to St. Louis

  • How do I get from Lambert St. Louis Airport (STL) to the city center?

    MetroLink provides train service from the airport to the city center. The train departs from Lambert Airport Terminal 1 station and arrives at Stadium Station. It typically runs 406 times weekly with the duration of the ride being around 45 minutes. Public buses also offer service the route between the airport and the city center with a journey time of around 45 minutes. The cost will vary depending on the bus you choose.

  • What seat options are available on Frontier flights from Philadelphia to St. Louis?

    Frontier Airlines offers several seat options, including standard seats, which are the regular seats, and stretch seats, which are seats with additional legroom that are available for purchase for an additional fee, and are often located in the front of the plane or the emergency exit rows. Frontier Airlines offer passengers the option to choose their own seats for a fee, instead of having the airline randomly assign them.

  • What is the luggage allowance on Southwest flights from Philadelphia to St. Louis?

    Southwest Airlines allows passengers on flights from Philadelphia to St. Louis to check up to two bags for free as part of the fare, provided that the bags do not exceed 50 lbs in weight and 62 inches in size. Passengers are allowed to bring one carry-on bag and one personal item on board the aircraft. The carry-on bag must not exceed 24 inches in length, 16 inches in width, and 10 inches in height. In addition, passengers will be charged an additional fee of $75 per one-way trip for bags that exceed the weight limit of 50 lbs, up to a maximum weight of 100 lbs.

  • What services are offered by Alaska Airlines on economy class flights from Philadelphia to St. Louis?

    Alaska Airlines offers several services on economy class flights including limited food and drinks, which may include a choice of snacks or meals, free soft drinks, coffee, and tea on all flights, leather headrests and a wide range of in-flight entertainment options, and standard economy seats with average legroom and seat-back pockets for storage.

  • What is the cheapest flight from Philadelphia to St. Louis?

    In the last 3 days, the lowest price for a flight from Philadelphia to St. Louis was $80 for a one-way ticket and $160 for a round-trip.

  • Do I need a passport to fly between Philadelphia and St. Louis?

    No, a passport isn't needed to fly from Philadelphia to St. Louis. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Philadelphia to St. Louis?

    Philadelphia and St. Louis are both served by 1 main airport. You will leave Philadelphia from Philadelphia and will be arriving at Lambert-St Louis.

  • Which airlines offer Wi-Fi service onboard planes from Philadelphia to St. Louis?

    American Airlines, JetBlue, Delta, and Alaska Airlines offer inflight Wi-Fi service on the Philadelphia to St. Louis flight route.

  • Which aircraft models fly most regularly from Philadelphia to St. Louis?

    The Airbus A319 is the aircraft model that flies most regularly on the Philadelphia to St. Louis flight route.

  • Which airline alliances offer flights from Philadelphia to St. Louis?

    SkyTeam, and oneworld are the airline alliances operating flights between Philadelphia and St. Louis, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Philadelphia to St. Louis?

    There are nonstop flights from Philadelphia to St. Louis on a daily basis.

  • Which is the best airline for flights from Philadelphia to St. Louis, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Philadelphia to St. Louis are Southwest and Delta. With an average price for the route of $417 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $425 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Philadelphia to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Philadelphia with another airline. Booking your flights between Philadelphia and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Philadelphia to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $176 or less one-way and $361 or less round-trip.
  • Flights from Philadelphia (PHL) to St. Louis (STL) have layovers in various cities depending on the airline. Some of these cities include Orlando (MCO), Dallas (DFW), Atlanta (ATL), Minneapolis (MSP), Denver (DEN), and Charlotte (CLT).
  • Flights from Philadelphia to St. Louis take approximately 7 hours so passengers can consider flying Business class on American Airlines flights. A Business class ticket on American Airlines gets you access to the Flagship Lounge at the airport, priority boarding, and lie-flat seats, making the overall journey more comfortable.
  • United Airlines is using sustainable aviation fuel (SAF) to reduce carbon emissions, with plans to use lower-carbon fuels on routes like those from Philadelphia to St. Louis.
  • Delta Air Lines provides wheelchair assistance to passengers who require assistance throughout their travels on flights from Philadelphia to St. Louis. The airline provides additional assistance at the airport, as well as on board flights, for passengers with reduced mobility or those traveling with a caregiver.
  • Lambert St. Louis Airport (STL) gives access to several other cities in the region. These include Berkeley, Hazelwood, Saint Ann, Bridgeton, Florissant, Ferguson, Maryland Heights, Overland, Creve Coeur, and Chesterfield.

Prefer to fly direct from Philadelphia to St. Louis?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Philadelphia to Lambert-St Louis.
Find which airlines fly direct from Philadelphia Airport to Lambert-St Louis Airport, which days they fly and book direct flights.

Direct departures

Philadelphia to Lambert-St Louis

Monday

American Airlines, Southwest

American Airlines, Southwest

Tuesday

American Airlines, Southwest

American Airlines, Southwest

Wednesday

American Airlines, Southwest

American Airlines, Southwest

Thursday

American Airlines, Southwest

American Airlines, Southwest

Friday

American Airlines, Southwest

American Airlines, Southwest

Saturday

American Airlines, Southwest

American Airlines, Southwest

Sunday

American Airlines, Southwest

American Airlines, Southwest

See more direct flights

Direct returns

Lambert-St Louis to Philadelphia

Monday

American Airlines, Southwest

American Airlines, Southwest

Tuesday

American Airlines, Southwest

American Airlines, Southwest

Wednesday

American Airlines, Southwest

American Airlines, Southwest

Thursday

American Airlines, Southwest

American Airlines, Southwest

Friday

American Airlines, Southwest

American Airlines, Southwest

Saturday

American Airlines, Southwest

American Airlines, Southwest

Sunday

American Airlines, Southwest

American Airlines, Southwest

See more direct flights

Reviews of the top 5 airlines serving from Philadelphia to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4303 reviews
8.1Boarding
7.0Food
7.5Entertainment
8.6Crew
8.0Comfort
Airline reviews

It was canceled. Supposedly weather. But there was no snow in Baltimore. At least we found out before driving to airport

2.0 MediocreAnonymous, Feb 2026
BWI - PBI
Read more Southwest reviews

It was canceled. Supposedly weather. But there was no snow in Baltimore. At least we found out before driving to airport

I have not flown Southwest in awhile and had a very pleasant experience. From ticketing to boarding to the flight. The flight left on time and landed ahead of schedule. It won't be so long next time!!

The Southwest experience has definitely taken a dive from its early days. You can no longer deferentiate from other airlines. Air travel is too expensive. Southwest is no longer budget friendly. They have lost me as a loyal customer.

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

An entire day of delays. Cost lots of money. Meals and a hotel.

Great plane, great attendants,great flight crew,on time. Wonderful flight home..

The WiFi and crew on the plane were good, however, the boarding experience was awful. I paid for the Choice Preferred and was boarded in group 5 so all overhead storage was full. They found room for our luggage, but further back making getting off the plane a nightmare. Also, we were in row 6 and the seats were extremely uncomfortable. Both my daughter and I had no leg room and couldn’t wait to get off the plane.

The charges were ridiculous for an hour flight and the turbulence was very scary.

Still need to work out the kinks on the new assigned seating boarding process. Otherwise, a very good flight.

WiFi did not work. Boarding with the new seating assignments took too long. The temperature in the terminal was obnoxious. +/- 80°

There’s not much to say about a one hour flight. This is a connection from LA to RNO that I missed the previous night due to a mechanical check delay on my originating flight from JFK to LAX. The short flight itself was fine. Instructions from the pilot and crew were per usual. The coffee was barely lukewarm, which possibly was purposeful so we would down it quickly. Bags were already on carousel upon reaching baggage claim, which was excellent.

Flight was warm for first few hours and quite rough

Seat was extremely hard which made even a short 1 hour 20 minute flight fairly uncomfortable.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

The staff was fine. The plane was extremely tight, and I paid for the wifi and it did not work at all. I was actually going to ask for a refund.

two hour delay and the Delta representative on the PA system was unable to understand

An awesome flight crew. FC seat cushion just doesn’t cut it for a 3+ hour flight.

2+hrs delay without any reason provided and a cramped flight

We waited an hour on the runway to get a gate in Orlando

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Boarding delayed 20 minutes for no reason, no wifi, in flight entertainment, or snacks / waters?

Beverage service was not good. Also just one service in 5 hr 30 min flight. No ask fir water ir anything beside one time beverage service.

They are always late and seats was also not having working charger

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Long delays, lack of information about the status of the flight. The flight was delayed 4 times.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

Delays to take off and to leave the plane after landing added a lot of time to this flight.

The Phildalphia to Allentown portion was a BUS, not a plane. All was as expected.

Excellent - explanations were clear staff was nice and flight was comfortable

bought basic spirit fares, add checked bags - like the up front info on website about this. bring your own snacks, buy a soda after TSA security to bring with you, or buy on the plane (limited selection) all in all, a good experience

I cannot effectively rate the food and drink as I had not. Otherwise, the trip was fine. The seats were nice, the crew was fine. They could smile once in a while. They all look like they were mad.

4 hour delay, 2 hours in the airport and then 2 hours on the tarmac. With a flight full of kids it would have been better to leave us in the airport for the delay, it was crying kids chaos on the flight. Miserable. And no apology or airline credit for the significant delay.

Flight was on time with no issues. Price is very competitive. Flight schedule works well for me

They charged late fees for selecting seats (no $0 options). They also changed my gate within the last half hour and are refusing to reimburse my costs to drive across the country with two small children in a rental car.

I was waiting in line for the restroom onboard, the flight attendant told me to step back two rows and stay on the carpet. She was rude and I expected a tik tok experience with me getting thrown off the plane. She was rude and frankly there was no where else to stand.

I needed a cheaper option than Southwest who are almost as bad as Spirit...did the check in the morning of the flight and assigned the last row, middle seat. Paid 20.00 at the airport for an exit row window in 19 and all 8 rows behind me which sold occupied on their seat map were empty....so they force to you to pay for a better seat....I was alone in row 19 and shortly after take off two huge fat people came and grabbed the other seats, I rang the call button for the attendant and said I paid 20.00 for this seat and they just moved in here...I either want to be reseated, or have them take their original seats or a refund of what I paid, the attendant made them move back to their original seats. Worst, worst worst airline in the air....never again, never again, never again.

It was cancelled a few hours before take off. Spirit has yet to confirm I will be refunded for the trip

gate agents with the different rules at the different airports. made me pay for my bag as a carry on instead of a personal item, yet it fit under the seat on the way from Indy to Ft Laud

charging $3 for really bad and cold coffee on airplane flight is ridiculous.

Gate not determined until I got to the airport - hard to plan the trip to the airport.

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

Frontier.. nickel and dime add-ons. Flight late, on time, late again, last minute gate change, arrival gate required a shuttle to the terminal. They sure keep you guessing.. if you like a little chaos and airport anxiety, this is the airline for you!

This is my second time flying with Frontier. My current experience was very favorable. The staff from the gate to the plane was friendly, warm and professional. The food options lacked in my opinion. This area needs some attention in my opinion.

First of all we hade waited 3 hours in the airplane waiting to leave. Second the return schedule was changed and it messed up my entire vaction. I won't buy never again another flight and recommend to nobody traveling with them.

There was no food and no entertainment, so I'm not sure why these are even in the survey, as my understanding is frontier does not ever offer food without a few, not even a snack, and there are no screens so unless the flight safety talk is our entertainment why ask how we liked it?. One of the flight attendants say in the back of the plane as people filed in to their seats, yelling orders about where to put baggage and telling people to hurry up. It was the least professional experience I've ever had on a flight.

Very well recently! Frontier is improving and less harrassing customer on luggages! Positive!

Good for a budget airline! It was easy to get on, staff was really nice. Can’t say anything about the food or entertainment because it wasn’t available, which is fine.

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

Everything you need to know for your flight from Philadelphia to St. Louis

Other airlines flying from Philadelphia to St. Louis

Flights from the other most popular airlines that fly from Philadelphia to St. Louis according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.