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STL - PHL

Find cheap flights from St. Louis to Philadelphia from $29

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Philadelphia departing on 6/5. 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
Thu 6/6
Thu 6/13

Search hundreds of travel sites at once for deals on flights to Philadelphia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Philadelphia, 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 St. Louis to Philadelphia, as well as popular online travel agencies
In the last 7 days travelers have searched 43,707,506 times on KAYAK, and here is why:

Save 21% 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 St. Louis to Philadelphia (STL-PHL)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Philadelphia 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
8:47 am - 12:01 pmSTL-PHL
2h 14mnonstop
6:30 am - 7:57 amPHL-STL
2h 27mnonstop
$52Frontier
Find Deal
Wed, May 22 - Wed, May 29
8:47 am - 12:01 pmSTL-PHL
2h 14mnonstop
6:30 am - 7:57 amPHL-STL
2h 27mnonstop
$58Frontier
Find Deal
Wed, May 29 - Sat, Jun 1
10:34 am - 12:42 amSTL-PHL
13h 08m1 stop
6:30 am - 7:57 amPHL-STL
2h 27mnonstop
Tue, May 21 - Wed, May 22
2:35 pm - 10:33 pmSTL-PHL
6h 58m1 stop
8:19 pm - 9:46 pmPHL-STL
2h 27mnonstop
Tue, Jun 4 - Wed, Jun 12
10:34 am - 3:17 pmSTL-PHL
27h 43m1 stop
7:18 pm - 6:40 pmPHL-STL
24h 22m1 stop
$97Spirit Airlines
Find Deal
Tue, May 21 - Wed, May 22
2:35 pm - 3:17 pmSTL-PHL
23h 42m2 stops
7:18 pm - 6:40 pmPHL-STL
24h 22m1 stop
$118Spirit Airlines
Find Deal
Tue, May 21 - Wed, May 22
6:40 am - 9:50 amSTL-PHL
2h 10mnonstop
7:14 pm - 8:56 pmPHL-STL
2h 42mnonstop
$189American Airlines
Find Deal
Tue, May 28 - Wed, Jun 5
6:30 am - 11:55 amSTL-PHL
4h 25m1 stop
6:00 am - 9:19 amPHL-STL
4h 19m1 stop
$198Delta
Find Deal
Sun, May 26 - Thu, Jun 6
6:30 pm - 12:53 amSTL-PHL
5h 23m1 stop
5:30 am - 9:10 amPHL-STL
4h 40m1 stop
$208Delta
Find Deal
Wed, May 29 - Sat, Jun 29
6:02 am - 9:19 amSTL-PHL
2h 17mnonstop
2:45 pm - 4:12 pmPHL-STL
2h 27mnonstop
$219American Airlines
Find Deal
Thu, Jul 4 - Mon, Jul 8

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

Get data-powered insights and trends into flights from St. Louis to Philadelphia 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 St. Louis to Philadelphia?

The average price of all flights from St. Louis to Philadelphia clicked on KAYAK for each day over the last 12 months.
When flying from St. Louis to Philadelphia, you should consider leaving on a Tuesday and avoid Sundays if you are looking for the best rates. For your return to St. Louis, you’ll find the best rates on Saturdays and the most expensive ones on Mondays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from St. Louis to Philadelphia, 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 St. Louis to Philadelphia is December, where tickets cost $310 on average. On the other hand, the most expensive months are November and February, where the average cost of tickets is $397 and $386 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from St. Louis to Philadelphia, 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 St. Louis to Philadelphia, you should book around 4 days before departure. For the absolute cheapest price, our data suggests you should book 87 days before departure.

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

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The best deals for a one-way ticket found by KAYAK users over the last 3 days were on Frontier ($29) and Spirit Airlines ($52). The cheapest round-trip tickets were found on Frontier ($52) and Spirit Airlines ($97).

Which airlines fly most frequently between St. Louis and Philadelphia?

St. Louis and Philadelphia are connected by different airlines. The airlines that fly that route the most regularly are American Airlines (6 flights per day), Southwest (3 flights per day), and Frontier (one flight per day).

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

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from St. Louis to Philadelphia.
There are 3 airlines that fly nonstop from St. Louis to Philadelphia. They are: American Airlines, Frontier and Southwest. The cheapest price of all airlines flying this route was found with Frontier at $78 for a one-way flight. On average, the best prices for this route can be found at Frontier.

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

Each day, there are between 8 and 13 nonstop flights that take off from St. Louis and land in Philadelphia, with an average flight time of 2h 12m. The most common departure time is 11:00 am and most flights take off in the morning. Each week, there are 73 flights. The most frequent day of departure is Wednesday, when 18% of all weekly flights depart. The fewest flights depart on a Sunday.

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

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 4 cabin class options for the route. These are First, Business, Economy and Prem 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 St. Louis to Philadelphia take?

Direct flights cover the 811 miles separating St. Louis to Philadelphia in about 2h 10m.

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

Early birds can take the earliest flight from St. Louis at 5:30 am and will be landing in Philadelphia at 8:47 am.

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

If you prefer to fly at night, the latest flight from St. Louis to Philadelphia jets off at 10:36 pm and lands at 1:48 am.

Good to know

Low season

January

High season

June

Cheapest flight

$29
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly and prices are also 0% lower on average.
Flight from St. Louis to Philadelphia

When to book flights from St. Louis to Philadelphia

Are your dates flexible? Find out the best times to travel from St. Louis to Philadelphia 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 St. Louis to Philadelphia

  • Does PHL have any pet relief areas?

    If you’re traveling with a pet through Philadelphia International Airport, please ensure that they remain in a safe carrier unless you’re using the pet relief areas. The pet relief areas at PHL are located at multiple points around the airport, including inside the terminals, in the departure areas, and the arrivals areas. For arriving passengers, the most conveniently-located relief areas can be found adjacent to Terminals A-East, Terminal B past baggage claim, and Terminal E along the Commercial Vehicle Roadway.

  • Which is the quickest way from St Louis to STL?

    There are multiple ways through which you can get to STL from the city center. The most popular method and also the most pocket-friendly would be using the metro, which can be boarded from the Civic Center. However, that isn’t the quickest. If you want to get to the airport within a shorter period, taking a taxi or driving via the I-64 W and I-170 N would be more ideal. This will take you about 15 minutes, while the metro will be 40 minutes on a good day.

  • Which airlines have a lounge at STL?

    At the moment, the only airline with a lounge at STL is American Airlines. They have an American Airlines Admirals Club located in Terminal 1 between Concourses B and C near Gate 1. Here you can find complimentary snacks and beverages, comfortable seats, TVs, and Wi-Fi. It is worth mentioning that the airport has other lounges: The USO Lounge and Wingtips Lounge, located in Concourse E on Terminal 2 near Gate E22.

  • How do I get to downtown Philadelphia from PHL?

    You can get to downtown Philly from PHL using multiple means, such as taxis, rental cars, airport shuttle, and public transit. For convenience, taxis and rental cars are a better choice since they are easily available at the airport and will take you to any destination in Philly. However, they are significantly more expensive compared to public transport.

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

    In the last 3 days, the lowest price for a flight from St. Louis to Philadelphia was $29 for a one-way ticket and $52 for a round-trip.

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

    No

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

    When flying out of St. Louis you will be using Lambert-St Louis. You will be landing at Philadelphia, also known as Philadelphia.

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

    All the following airlines offer inflight Wi-Fi service on the St. Louis to Philadelphia flight route: American Airlines, Delta, Alaska Airlines, United Airlines, PSA Airlines, Lufthansa, and JetBlue.

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

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

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from St. Louis to Philadelphia are Delta and United Airlines. With an average price for the route of $366 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 $570 and an overall rating of 7.4.

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

    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 St. Louis to Philadelphia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Philadelphia from St. Louis 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 St. Louis to Philadelphia?

    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 Philadelphia with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and PHL 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 St. Louis to Philadelphia?

    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 Philadelphia from St. Louis 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 STL to Philadelphia

  • Looking for a cheap flight? 25% of our users found flights on this route for $174 or less one-way and $339 or less round-trip.
  • If you want to leave your car at St. Louis Lambert International Airport (STL), please ensure that you compare the rates charged by airport parking to those charged by offsite parking companies. In most cases, the offsite parking lots charge lower rates compared to airport parking, and you even get a free shuttle to the terminals.
  • Traveling moms will be happy to know that PHL has multiple nursing suites where you can privately breastfeed your child. The Mamava Suites are located in four different areas; in Terminals A West and Terminal F, as well as the B/C and D/E Connectors. These nursing suites are available for free to all travelers.
  • To save on flight costs, consider booking your flight tickets in advance and be flexible with your travel dates. For example, avoid traveling on holidays and weekends since the ticket demand is usually higher on such days, so airlines will charge higher prices for these tickets.
  • Consider booking direct flights instead of connecting flights to make your trip more sustainable. This is because direct flights are shorter and therefore end up burning less fuel leading to lower carbon emissions compared to connecting flights.
  • If you need specific in-flight services such as Wi-Fi, please confirm their availability during the booking. This is because different flights tend to offer varying services even when serviced by the same airline.
See more tips

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

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

Nonstop departures

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

Nonstop returns

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
See more direct flights

Top 5 airlines serving from St. Louis to Philadelphia

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Philadelphia. 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 St. Louis to Philadelphia? 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 10810 reviews
8.2Boarding
8.6Crew
7.4Food
8.0Entertainment
7.9Comfort
Airline reviews

The gate area was incredibly short staffed, with one representative manning 4-5 flights, which caused a 3 hr delay in boarding even though the plane was all ready to leave. Other flights also were delayed because of this. The flight crew was awesome and I feel bad for the only gate worker on call, but Delta needs to hire more employees.

2.0 MediocreAnonymous, May 2024AVL - LGA
Read more about Delta reviews

The gate area was incredibly short staffed, with one representative manning 4-5 flights, which caused a 3 hr delay in boarding even though the plane was all ready to leave. Other flights also were delayed because of this. The flight crew was awesome and I feel bad for the only gate worker on call, but Delta needs to hire more employees.

Very frustrated with boarding gate crew. She announced the plane was small and they would be limiting us to one item to carry on. Not a problem for me as I understand the tiny planes have limited space!! Not the case here! It was a rather large plane and had plenty of room for bags! So because I don’t want to be one of “those people” who ignores the request to check a carry on I did so asking if I would be able to pick it up at the bottom of the ramp on arrival in Knoxville to which she responded “yes”! Then I watched as every other passenger held onto their 2 items and boarded!! Then when we arrived in Knoxville our 2 carry ons had been put with all the other luggage and we had to go to baggage pick up and wait for all the big checked bags to come off the carousel! So she lied!! Frustrating. Next time I won’t be so nice!

It was a good experience except when boarding a female flight attendant did not go out of her way to assist my teenage daughters in finding space for their carry-ons after their compartments were full.

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

Checking in at the airport the agent only booked the first keg of my trip and had my checked luggage going to the airport with a layover! Never was issued a boarding pass for the second leg or received sticker fir my checked bag. All was well in the end! Delta agents helped to resolve the situation!!!

Delayed due to an ill passenger after loading. Not preventable on Delta's part. Was in first class. The seats are becoming worn and detaching from their velcro attachments. Only got snacks on flight. The attendant was not the friendliest.

I would fly again the whole experience was great. The only feed back I can give that they don't do that American Airlines does is the crew there is more humorous with boarding and thank their passengers. It makes it more fun to fly with them. I would however fly Delta again.

From Atlanta to Cabo I would have hoped on a plane that size I would have been able to breathe and wiggle my feet a little! The leg room in that plane is non existent and I am only 5”4’. And the air vent either wasn’t working very well or just could not blow air from the ceiling to the seat area as I was suffocating through the entire flight! And please don’t say I would have been more comfortable in first class because I cannot afford those rates and have always travelled Main Cabin without issues !

The pilots were good. Disappointing when planes don't have electrical ports

I liked the piloting of the aircraft. Very disappointed about lack of electrical ports. Also, although a short flight. there was enough time to hand out snacks to comfort + seats as was done for first class.

Surprisingly easy! I was hesitant to try this, but the cost swayed me. I actually felt like I had less stress than all the taxiing and possible delays that occur with short regional flights where you spend less time in the air than getting to and from the plane..

This flight was delayed multiple times and eventually canceled around 2-3ish. Original take off time was around 10:30am. By 3, there were no other options out of Houston, so stuck in Houston for from 3pm - 11am the next day.

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

All flights were on time and boarding was issue free

Terrible! The plane was old and you are required to connect your own device to their Wi-Fi rather than have entertainment options in the back of the seat in front of you. The Wi-Fi went out during the flight and there was only one plug for the devices every two seats. Three out of five surrounding my family did not work. The seats and spaces under them were so small I could not fit my backpack, which I’ve always brought on flights and fit before no problem. The crew were unpleasant and patronizing.

Great! The plane was decently sized and comfortable. The staff was nice and there was great in flight entertainment

Great crew. We were delayed so that late passengers could get on the flight. Love the bedding in business class. Good food. Great experience.

Too bad that first class seats do not recline significantly causing discomfort

The experience was great and much better than the flight going out. of course I was in first class but the service was excellent

Food options were limited which is absolutely embarrassing for a Flight of this size The staff did not come around as much and I am not accustomed to such poor service from American Airlines Drinks I believe were limited to soda and water

Was as expected. Good leg room on planes - much appreciated.

Smaller, regional aircraft limits amount of overhead luggage space. At least there were jetways at both BNA and PHL. First class food service was minimal with the usual assortment of packaged snacks (nothing creative) and no handiwipes. American tries to turn around aircraft too quickly without enough time to clean the planes. WIFI service did not include TV programming.

6 plus hour delay with no explanation. No wheelchairs to transport us on arrival. Very disappointed.

Food choice is limited, entertainment better than average, seat leg room terrible

While I received notice that AA 478 was delayed, the flight departed PHX and arrived PHL more than two hours late. The first class cabin service was mediocre; there were no pre-departure beverages offered; there were no warm mixed nuts served with cocktails; there was no personal greeting to me as an Executive Platinum member by the first class flight attendant. While the flight operated safely, its arrival at 0219 in the morning in PHL ended a very long day. I do not feel that American provided first class service.

Late arrival due to gate being blocked by stalled truck

For it to have left on time! Instead of two hours early with zero notice

Flight kept delayed from morning to late afternoon so I had to make other arrangements

Crew was nice, explained emergency protocol very well. Flight took off and arrived on time. Pilot explained the small delay that occurred with docking and providing updates. I would definitely fly spirit again.

Terrible… missed our flight due to ridiculously long time to go thru baggage check-in!

The crew was not great or professional. It seemed like they didn't really want to be there. A true lack of effort for accommodating customers.

Everything was really good but the seats are not very comfortable.

I paid for WiFi, but it (WiFi) was very very slow, will never take again! Impossible open Utube 😤😤😤

I had no legroom, although I paid for extra legroom. I could barely put my bag in front of my feet and under the seat. The Wi-Fi was horrible. In fact the flight attendant said that they had to reboot it and see if it was going to work and never did.

The guy with severe body odor sat next to me. For the whole duration of the flight it was a torture. The airline should have better policy on limiting people with bad body odor to board the flight. Passengers should not be the ones to endure bad odor for the whole duration of the flight. The airline should be e the one to ensure decent air quality for ever passenger.

Overall it was a miserable experience... I will never fly spirit for more than a 3 hour flight or overnight.

Frontier is a crappy airline nothing about it is honest

I didn't get to do this flight l, hard to review

Not good 😐 Over priced baggage fees Small hard seats No wifi or entertainment options 😕

Didn't like anything!! Horrible flight. Small seating area and hard seats. Butt was sore after 2 hour flight to Seattle No entertainment or free refreshments No wifi or USB charging receptacles to charge phone entoute like other airliners Luggage rates were 3 times as much as competitors. Difficult to navigate online luggue process to pre pay before flight Overall bad experience WILL NEVER RIDE OR RECOMMEND FRONTIER TO FRIENDS OR FAMILY MEMBERS!!! THIS IS A SHAME!! MOST MESERIBLE FLIGHT OF MY LIFE!! AND I THOUGHT SPIRIT WAS 👎 YOU GOT THEM BEAD HANDS DOWN!!

Flight was a little late taking off. Seats are too upright, no ports to charge devices, no wifi, no entertainment

Six hour delay. Poor customer service. No voucher. Bad communication. Missed important appointments.

Our flight was delayed an hour, then when we got to board our flight finally, we were waiting in our seats for take off for 45 minutes before it was communicated that there was a maintenance issue therefore we waited on the plane for over an hour while that was resolved. We did not get to Phoenix until almost 3 hours after we were originally supposed to. This was the first and last time I will be flying Frontier.

Flight was canceled with little warning. Flight was rebooked through Ontario, California and connecting flight was delayed by over three hours. Frontier is living up to their Greyhound of the skies reputation for sure.

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.

Book cheap flights from St. Louis to Philadelphia

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to Philadelphia found on KAYAK in the last 72 hours.
6/5Wed
nonstopFrontier
2h 12mSTL-PHL
$29
5/25Sat
nonstopFrontier
2h 14mSTL-PHL
$39
5/28Tue
2 stopsSpirit Airlines
17h 25mSTL-PHL
$52
5/28Tue
1 stopSpirit Airlines
26h 53mSTL-PHL
$53
6/27Thu
nonstopAmerican Airlines
2h 17mSTL-PHL
$90
6/20Thu
1 stopDelta
4h 12mSTL-PHL
$99
5/28Tue
nonstopAmerican Airlines
2h 10mSTL-PHL
$100
6/7Fri
1 stopDelta
6h 12mSTL-PHL
$208
9/2Mon
2 stopsUnited Airlines
19h 25mSTL-PHL
$263
5/25Sat
2 stopsUnited Airlines
12h 02mSTL-PHL
$375

Search by stops

Search by airline

Search by price

Last minute flights from St. Louis to Philadelphia

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 St. Louis to Philadelphia that are departing in the next 10 days.
5/8Wed
multi-stop
19h 33mSTL-PHL
5/15Wed
multi-stop
24h 22mPHL-STL
$223
5/8Wed
multi-stop
24h 47mSTL-PHL
5/15Wed
multi-stop
24h 22mPHL-STL
$254
5/12Sun
multi-stopFrontier
13h 06mSTL-PHL
5/14Tue
multi-stopFrontier
14h 07mPHL-STL
$264
5/9Thu
multi-stopSpirit Airlines
16h 55mSTL-PHL
5/15Wed
multi-stopSpirit Airlines
24h 22mPHL-STL
$295
5/9Thu
multi-stopSpirit Airlines
16h 55mSTL-PHL
5/14Tue
multi-stopSpirit Airlines
19h 11mPHL-STL
$327
5/11Sat
multi-stopFrontier
15h 38mSTL-PHL
5/12Sun
multi-stopFrontier
14h 07mPHL-STL
$437
5/8Wed
nonstopAmerican Airlines
2h 10mSTL-PHL
5/11Sat
nonstopAmerican Airlines
2h 29mPHL-STL
$553
5/8Wed
nonstopAmerican Airlines
2h 11mSTL-PHL
5/11Sat
multi-stopAmerican Airlines
4h 51mPHL-STL
$561
5/8Wed
multi-stopDelta
6h 30mSTL-PHL
5/11Sat
multi-stopDelta
4h 36mPHL-STL
$572
5/8Wed
multi-stopDelta
6h 30mSTL-PHL
5/12Sun
multi-stopDelta
4h 44mPHL-STL
$590

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St. Louis - Philadelphia Flights

Departure:

St. Louis (undefined)United States

Destination:

Philadelphia (PHL)United States

Return flight deals:

Philadelphia - St. Louis

Cabin classes:

$864
$1,166
$1,689
$168