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PHL - STL

Find cheap flights from Philadelphia to St. Louis from $39

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 5/25. 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
0 bags
Sun 5/26
Sun 6/2

Search 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
In the last 7 days travelers have searched 44,979,812 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals 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 and deals for you by selecting your travel dates.
Choose your dates
10:53 am - 12:20 pmPHL-STL
2h 27mnonstop
5:57 pm - 9:11 pmSTL-PHL
2h 14mnonstop
$158Frontier
Find Deal
Fri, May 24 - Mon, May 27
12:51 pm - 2:18 pmPHL-STL
2h 27mnonstop
8:22 pm - 5:37 amSTL-PHL
8h 15m1 stop
$159Frontier
Find Deal
Sat, Jun 22 - Mon, Jun 24
5:10 am - 9:39 amPHL-STL
29h 29m1 stop
9:26 pm - 9:41 pmSTL-PHL
23h 15m1 stop
Mon, May 13 - Mon, May 20
4:17 pm - 5:29 pmPHL-STL
26h 12m1 stop
7:16 pm - 7:50 amSTL-PHL
11h 34m1 stop
Wed, May 8 - Fri, May 10
7:14 pm - 8:56 pmPHL-STL
2h 42mnonstop
5:38 pm - 12:51 amSTL-PHL
6h 13m1 stop
$177American Airlines
Find Deal
Tue, Jun 25 - Tue, Jul 2
8:26 am - 1:10 pmPHL-STL
5h 44m1 stop
5:15 am - 10:34 amSTL-PHL
4h 19m1 stop
$185American Airlines
Find Deal
Wed, May 29 - Wed, Jun 26
6:31 am - 1:37 pmPHL-STL
8h 06m1 stop
7:30 pm - 3:41 pmSTL-PHL
19h 11m2 stops
$207Spirit Airlines
Find Deal
Tue, May 14 - Thu, May 16
6:31 am - 6:40 pmPHL-STL
13h 09m1 stop
10:34 am - 8:04 amSTL-PHL
20h 30m2 stops
$208Spirit Airlines
Find Deal
Thu, May 16 - Tue, May 21
5:30 am - 9:05 amPHL-STL
4h 35m1 stop
5:29 pm - 11:04 pmSTL-PHL
4h 35m1 stop
$216Delta
Find Deal
Sat, May 25 - Sat, May 25
6:19 pm - 11:44 pmPHL-STL
6h 25m1 stop
2:10 pm - 7:35 pmSTL-PHL
4h 25m1 stop
$312Delta
Find Deal
Mon, Jul 8 - Fri, Jul 12

Flights from Philadelphia to St. Louis - Travel Insights & Trends

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 flights from Philadelphia to St. Louis clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from Philadelphia to St. Louis, look for departures on Saturdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from St. Louis, Tuesday is the cheapest day to fly and Sunday is 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 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 February, where tickets cost $364 on average. On the other hand, the most expensive months are March and June, where the average cost of tickets is $445 and $429 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for 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 month.
To get a below average price on the flight from Philadelphia to St. Louis, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 64 days before departure.

Which airlines provide the cheapest flights from Philadelphia to St. Louis?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the past 3 days, the cheapest one-way tickets to St. Louis from Philadelphia were found on Frontier ($39) and Spirit Airlines ($55), and the lowest round-trip tickets were found on Frontier ($158) and American Airlines ($177).

Which airlines fly non-stop between Philadelphia and St. Louis?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Philadelphia to St. Louis.
There are 3 airlines that fly nonstop from Philadelphia to St. Louis. They are: American Airlines, Frontier and Southwest. The cheapest price of all airlines flying this route was found with Frontier at $81 for a one-way flight. On average, the best prices for this route can be found at Frontier.

How many flights are there between Philadelphia and St. Louis per day?

Each day, there are between 4 and 5 nonstop flights that take off from Philadelphia and land in St. Louis, with an average flight time of 2h 31m. The most common departure time is 7:00 pm and most flights take off in the morning. Each week, there are 32 flights. The most frequent day of departure is Friday, when 16% of all weekly flights depart. The fewest flights depart on a Tuesday.

Which cabin class options are there for flights between Philadelphia and St. Louis?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There are 3 cabin class options for the route. These are First, Business and Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Philadelphia to St. Louis take?

The average nonstop flight takes 2h 15m, covering a distance of 811 miles.

What’s the earliest departure time from Philadelphia to St. Louis?

Early birds can take the earliest flight from Philadelphia at 5:01 am and will be landing in St. Louis at 6:28 am.

What’s the latest departure time from Philadelphia to St. Louis?

If you prefer to fly at night, the latest flight from Philadelphia to St. Louis jets off at 8:16 pm and lands at 9:45 pm.

Good to know

Low season

February

High season

May

Cheapest flight

$39
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 6% 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 $39 for a one-way ticket and $158 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, and Delta 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?

    oneworld is the only airline alliance operating flights between Philadelphia and St. Louis.

  • 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, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Philadelphia to St. Louis are Delta and United Airlines. With an average price for the route of $418 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $463 and an overall rating of 7.4.

  • 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.

See more FAQs

Top tips for finding a cheap flight from PHL to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $99 or less one-way and $203 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.
See more tips

Prefer to fly non-stop from Philadelphia to St. Louis?

Find which airlines fly direct from Philadelphia to Lambert-St Louis, which days they fly and book direct flights.

Nonstop departures

Philadelphia to Lambert-St Louis

Monday

American Airlines, British Airways, Frontier, +3 more

American Airlines, British Airways, +4 more

Tuesday

American Airlines, British Airways, Iberia, +2 more

American Airlines, British Airways, +3 more

Wednesday

American Airlines, British Airways, Frontier, +3 more

American Airlines, British Airways, +4 more

Thursday

American Airlines, British Airways, Iberia, +2 more

American Airlines, British Airways, +3 more

Friday

American Airlines, British Airways, Frontier, +3 more

American Airlines, British Airways, +4 more

Saturday

American Airlines, British Airways, Frontier, +3 more

American Airlines, British Airways, +4 more

Sunday

American Airlines, British Airways, Iberia, +2 more

American Airlines, British Airways, +3 more

See more direct flights

Nonstop returns

Lambert-St Louis to Philadelphia

Monday

Aer Lingus, American Airlines, British Airways, +4 more

Aer Lingus, American Airlines, +5 more

Tuesday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

Wednesday

Aer Lingus, American Airlines, British Airways, +4 more

Aer Lingus, American Airlines, +5 more

Thursday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

Friday

Aer Lingus, American Airlines, British Airways, +4 more

Aer Lingus, American Airlines, +5 more

Saturday

Aer Lingus, American Airlines, British Airways, +4 more

Aer Lingus, American Airlines, +5 more

Sunday

Aer Lingus, American Airlines, British Airways, +3 more

Aer Lingus, American Airlines, +4 more

See more direct flights
See more direct flights

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
DeltaOverall score based on 10975 reviews
8.0entertainment
8.2boarding
7.9comfort
8.6crew
7.4food
Airline reviews

Delta is one of the best airlines I have flown

10.0 ExcellentKellie, Apr 2024ANC - SEA
Read more about Delta reviews

Delta is one of the best airlines I have flown

Made the Atlanta to Pittsburgh trip many times, with Delta no issues

I always fly with Delta. My friends tell me their horror stories of flying with other airlines. I just smile and say, “You should fly Delta”

I'm a larger, athletic guy (6'2", 260lbs powerlifter) and I found the seats incredibly uncomfortable with minimal leg room, especially in a window seat. Now, I full understand that being smaller may change my view but even if I was 80lbs less, my legs would be the same size and I was sandwiched between my seat and the seat in front of me.

Horrible. This was not first class. This was a connecting flight whi h was late. My original flight never came. I hated the fact that delta gave me a connecting flight from New York to Orlando Florida. No meals and the television screens were not working. There wasn't even any power to charge your phones. This is NOT FIRST CLASS DELTA!!! Do better next time!

This flight was ridiculous. I had to have a connecting flight from New York to orlando Florida??? The flight left late and because it was a short flight there was no first class amenities. I had one alcohol drink. The flight crew was fine, but it sure did not feel like first class. Delta to me dropped the ball by giving me a connecting flight. By the time we got to Raleigh we would have missed the next flight. Lucky for me the flight never came so now I was stuck waiting for a later flight that came in late also.

Our flight was delayed in Atlanta. The staff could have gave us an explanation for the delay and how long it would be.

I liked the ease of checking in, luggage check in, wheel chair assistance, boarding and flight.

On my way home I had a layover. The flight from ATL to CLT was amended 5x while I was waiting. I could have driven home sooner. Overall from Dallas, Tx to Charlotte, NC I started my trip at 4:30pm, I didn’t get home until past midnight. I know things happen, but 5x to make me run back and forth in an airport from different terminals is excessive. I also upgraded to comfort + , I didn’t feel it was worth it. There was no benefit

On my way home I had a layover. The flight from ATL to CLT was amended 5x while I was waiting. I could have driven home sooner. Overall from Dallas, Tx to Charlotte, NC I started my trip at 4:30pm, I didn’t get home until past midnight. I know things happen, but 5x to make me run back and forth in an airport from different terminals is excessive.

So so. Terrible aircraft choice for that leg of the flight.

Due to one crew member not showing up to work, our flight was significantly delayed causing us to miss our connecting flight in Houston to Mississippi causing us to be delayed by more than 6 hours and missing our event all together. Very disappointing. All because ONE crew member called in sick. United did grant us a $15 meal voucher, which was a small but appreciated concession that I wasn’t able to use because I ordered my lunch and paid for it before applying the concession, and the staff said it was too late to use it. Ugh! We also had a TWO delay coming back from Mississippi, but that was on American Airlines and it was due to weather, so not their fault. Anyway, not at all impressed with United’s handling of our flight and the HUGE disappointment of missing our important family event for our 90 year old mother. All that money and all that stress and emotions for nothing. Having to wait the hour to bring an employee from LAX seemed like something that should not have happened. Why don’t you have a local back-up? Santa Ana is not a little airport in a rural area.

Flight delayed from Cape Town to Washington then got diverted to miami and in miami we had to fend for ourselves , im still trying to get to Shreveport now

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

I just wrote a text which was supposed to be for the flight from Denver to spokane not Frankfurt to Denver.

On time every leg of the journey and exceptional staff at counter, gate, and on board. I haven’t travelled in US for a long time and was genuinely surprised how pleasant this was.

The delays (5 hrs) were a comedy of errors, and the multiple safety issues encountered were very concerning.

flight delays, staff only communicating when pushed, food service lasting a grand total of 7 minutes, stuck in seat from 45mins into flight until landing

Crew was great and did their best to make us comfortable and captain came out at the beginning to announce why the flight was delayed, weather situation up ahead, and kept us updated throughout the flight.

they made me check my carryon. There was space in the overhead bins.

Same basket of unhealthy prepackaged snacks (junk food) which was depleted by the time it got to my row!!

We experience delays on departure and connecting flights resulting in 14 hour to our next departure. We were accommodated with a night's stay but was only provided a 12 dollar meals accommodation. The airlines rules state.at least 50 dollars. In any case, it can not make up for the whole day missed on our vacation in Sydney Australia.

Flight from PHL to PHX arrived 50 minutes early and a gate was available. First class flight attendant Stephanie was very friendly and polite. Sanitizing wipes should be provided with meals in addition to refresher towels.

flight delayed so missed connection and this had to rebook for next day

Flight departed PHL one hour late due to late arrival of aircraft. On board services were okay. First class menu does not offer any new items; same desserts (cheese & crackers or Mango sorbet). At least there were no credit card promotions during the flight.

After sitting on plane for 7+ hours, flight was canceled. And to makes matters worse, my suitcase is in baggage hell!

Terrible Ticketing and Check in process. I learned that AA unilaterally cancelled my premium seating from PHL to CLT and from CLT to JAN. They did, however, refund my money, but my seating was subsequently severely downgraded. They didn’t have a seat for my unless I paid for it! Not cool! Consequently, Check-in took 45 min. AA is usually great, but this was my worst experience with AA ever. Appalling they they arbitrarily cancel my seats threatening loss of flight if I didn’t pay for a seat!!!! -John

We liked quick boarding and on time departure. Seats were very uncomfortable.

I did like the employee's, they are very friendly and all smiled most of the time, Overall, from checking in bags to getting on plane, not enough employees to be able to get all on the plane, therefore I was not able to get on the plane, due to no one wea there for me to check in my bag, so I decided to go thru the security point and by the time they were done with my bags, I was told that my bag cannot be checked in, and then found out that the lady that does the check in was boarding the customers onto the plane, she said that she was going back and fourth, there for was not able to get on the plane, which changed all my flights by the time I got to Dallas, I was on standby 3 times, and wasn't sure about being able to get on the fourth plane, so ended up buying another plane ticket, so I could make my destination on time.

Not sure about entertainment as I didn't use any, so maybe there should be an NA option on this survey. Otherwise everything was just as it should be. Of course I wish planes were more comfortable and had seats that would tilt back further.

Not much seat room, but that was unexpected. But the seat headrest was very uncomfortable.

First the good, everyone was friendly and efficient. Flight was smooth and plane was very clean and new. Now the bad, seats have almost no padding on your behind. I was in exit row so I had tons of leg room for a 6' 2" bean pole with long legs. Everything was extra - water, soda, snacks everything besides oxygen. Ya get what you pay for, and my flight was cheap as you could ever want it, so no worries.

First the good, everyone was friendly and efficient. Flight was smooth and plane was very clean and new. Now the bad, seats have almost no padding on your behind. I was in exit row so I had tons of leg room for a 6' 2" bean pole with long legs. Everything was extra - water, soda, snacks everything besides oxygen. Ya get what you pay for, and my flight was cheap as you could ever want it, so no worries. They dont really bother you about carry-on size, I brought a descent sized backpack and they didnt even check.

Spirit canceled the flight in March and never notified me!

Seats suck, not enough room, overcrowded planes, hectic situation all together.

Pretty good. Would’ve been excellent if we would have left on time and the crew wasn’t late.

I do not like the customer service, I had an emergency and needed to cancel a pet reservation right after I had booked it and they would not do anything but issue a credit. I haven't flown in years as I have 7 kids and don't have spare time. I want my $125 back on my card please

Spirit airline tries to screw you at every opportunity. Spirit wanted 65$ for an extra pound in the suitcase Made me open the suitcase at the counter to remove 1 pound. Staff very cold and rude Will never fly spirit again and will recommend same to family and friends

Delayed..4 times...completely disorganized boarding. After 5 hours they scrambled to move ppl off plane bc they overbooked. Then they didn't have a cabin crew. WiFi on plane didn't work. Zero amenities. Once we boarded we sat on tarmac for an hour. Explore all alternate options including purchasing a pair of hiking boots and walking to your destination instead of flying spirit.

what I like about Spirit is that the pilot and crew are good communicators. The plane itself - well, its a budget airline and you get what is expected, But I generally just feel safer, somehow, when I know more about what is going on - and Spirit has always done a good job of telling me what is going on: why the delay, why the turbulence, why this and that... and that means a lot to me.

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

Flight was OK. Seats were good no cell phone charges on the plane no TVs or entertainment.

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

Flight cancelled and was told by a rude gate agent that they don’t accommodate on other airlines. Had to wait 5 hours for a connecting flight that had a 7 hour layover. Would not allow bags to be checked early so we couldn’t go through security .Had to rent a car for the afternoon to store bags and get a meal. Also incurred a hotel fee. No apology or reason given for the cancellation- just rudeness.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The process of buying the ticket and navigating all the hidden charges that Frontier throws at you was a terrible experience. The actual airport experience and flying was fine.

The truck that was refueling the plane drove away with the hose still connected to the plane and ripped part of the plane off with it

Not have to pay for every single item to take a flight. Seating and delays sucked.

Flight was cancelled and I had to spend the night in the airport lugging my suitcase around

If you don’t check in 24 hours in advance, they will charge you $110 to check your bag instead of the $30. I did not get an email with this information and did not check in. In addition, my flight home was cancelled at layover and I had to spend the night in the airport, and then have another layover at another airport before making it home. Will not fly frontier again.

Book cheap flights from Philadelphia to St. Louis

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Philadelphia to St. Louis found on KAYAK in the last 72 hours.
5/25Sat
nonstopFrontier
2h 27mPHL-STL
$39
6/10Mon
nonstopFrontier
2h 27mPHL-STL
$49
5/11Sat
1 stopSpirit Airlines
12h 15mPHL-STL
$55
5/6Mon
1 stopSpirit Airlines
16h 38mPHL-STL
$66
6/8Sat
1 stopDelta
4h 40mPHL-STL
$97
6/10Mon
1 stopDelta
5h 15mPHL-STL
$98
5/30Thu
nonstopAmerican Airlines
2h 38mPHL-STL
$120
5/15Wed
nonstopAmerican Airlines
2h 38mPHL-STL
$130
5/18Sat
2 stopsUnited Airlines
10h 46mPHL-STL
$293
5/15Wed
2 stopsUnited Airlines
15h 54mPHL-STL
$326

Search by stops

Search by airline

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Last minute flights from Philadelphia to St. Louis

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Philadelphia to St. Louis that are departing in the next 10 days.
4/30Tue
multi-stopSpirit Airlines
8h 18mPHL-STL
5/2Thu
multi-stopSpirit Airlines
21h 33mSTL-PHL
$168
4/26Fri
multi-stopFrontier
25h 38mPHL-STL
5/15Wed
multi-stopFrontier
8h 20mSTL-PHL
$197
4/30Tue
multi-stop
8h 32mPHL-STL
5/2Thu
multi-stop
16h 52mSTL-PHL
$270
4/30Tue
multi-stop
34h 40mPHL-STL
5/7Tue
multi-stop
17h 25mSTL-PHL
$285
4/26Fri
nonstopAmerican Airlines
2h 37mPHL-STL
5/15Wed
nonstopAmerican Airlines
2h 10mSTL-PHL
$456
4/26Fri
multi-stopAmerican Airlines
6h 55mPHL-STL
5/15Wed
nonstopAmerican Airlines
2h 10mSTL-PHL
$464
4/30Tue
multi-stopUnited Airlines
10h 46mPHL-STL
5/11Sat
multi-stopUnited Airlines
6h 21mSTL-PHL
$645
4/26Fri
multi-stopUnited Airlines
10h 46mPHL-STL
5/15Wed
multi-stopUnited Airlines
12h 18mSTL-PHL
$666
4/26Fri
multi-stopDelta
4h 20mPHL-STL
4/28Sun
multi-stopDelta
7h 25mSTL-PHL
$1,146
4/26Fri
multi-stopDelta
9h 28mPHL-STL
4/28Sun
multi-stopDelta
7h 25mSTL-PHL
$1,894

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Philadelphia - St. Louis Flights

Departure:

Philadelphia (PHL)United States

Destination:

St. Louis (STL)United States

Return flight deals:

St. Louis - Philadelphia

Cabin classes:

$1,286
$120

Compare transportation modes for Philadelphia to St. Louis

Average priceAverage duration
Flights$2462h 15m
Buses$22925h 09m