$34 Cheap flights from Lambert-St. Louis Intl. to Philadelphia Intl. (STL to PHL)

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Find The Best Dates To Fly from Lambert-St. Louis Intl. to Philadelphia Intl.

Amazing STL to PHL Flight Deals

The cheapest flights to Philadelphia Intl. found within the past 7 days were $69 round trip and $34 one way. Prices and availability subject to change. Additional terms may apply.

Wed, May 22 - Wed, May 29
STL
St. Louis
PHL
Philadelphia
$69 Roundtrip, found 2 days ago
$69
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, May 22 from St. Louis to Philadelphia, returning Wed, May 29, priced at $69 found 2 days ago
Wed, May 22 - Wed, May 29
STL
St. Louis
PHL
Philadelphia
$78 Roundtrip, found 6 hours ago
$78
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Wed, May 22 from St. Louis to Philadelphia, returning Wed, May 29, priced at $78 found 6 hours ago
Wed, May 15 - Wed, May 22
STL
St. Louis
PHL
Philadelphia
$81 Roundtrip, found 2 days ago
$81
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, May 15 from St. Louis to Philadelphia, returning Wed, May 22, priced at $81 found 2 days ago
Wed, May 22 - Wed, May 29
STL
St. Louis
PHL
Philadelphia
$86 Roundtrip, found 1 day ago
$86
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, May 22 from St. Louis to Philadelphia, returning Wed, May 29, priced at $86 found 1 day ago
Sat, Sep 21 - Sat, Oct 5
STL
St. Louis
PHL
Philadelphia
$88 Roundtrip, just found
$88
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Sep 21 from St. Louis to Philadelphia, returning Sat, Oct 5, priced at $88 just found
Fri, May 10 - Wed, May 22
STL
St. Louis
PHL
Philadelphia
$91 Roundtrip, found 2 days ago
$91
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Fri, May 10 from St. Louis to Philadelphia, returning Wed, May 22, priced at $91 found 2 days ago
Wed, May 22 - Fri, May 31
STL
St. Louis
PHL
Philadelphia
$96 Roundtrip, found 3 days ago
$96
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Wed, May 22 from St. Louis to Philadelphia, returning Fri, May 31, priced at $96 found 3 days ago
Sat, May 18 - Sat, May 25
STL
St. Louis
PHL
Philadelphia
$98 Roundtrip, found 6 days ago
$98
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Sat, May 18 from St. Louis to Philadelphia, returning Sat, May 25, priced at $98 found 6 days ago
Sat, May 4 - Wed, May 22
STL
St. Louis
PHL
Philadelphia
$99 Roundtrip, found 3 days ago
$99
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Sat, May 4 from St. Louis to Philadelphia, returning Wed, May 22, priced at $99 found 3 days ago
Sat, May 11 - Wed, May 22
STL
St. Louis
PHL
Philadelphia
$105 Roundtrip, found 2 days ago
$105
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Sat, May 11 from St. Louis to Philadelphia, returning Wed, May 22, priced at $105 found 2 days ago

Flight Schedule for STL to PHL

CarrierFlightDepart STLArrive PHLFri
4/26		Sat
4/27		Sun
4/28		Mon
4/29		Tue
4/30		Wed
5/1		Thu
5/2		Stops
AA227506:40 am09:50 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops

Frequently asked questions

Can I catch a flight from Lambert-St. Louis Intl. Airport (STL) to Philadelphia Airport right now?
Be sure to visit our Covid-19 Travel Advisor to learn if there are any present travel advice reports or quarantine requirements in effect in Philadelphia Airport when flying in from Lambert Field.
Are there direct flights from St. Louis Lambert International Airport to Philadelphia Airport?
Sometimes, a vacation is all about the journey; sometimes the magic is in the destination. But if you just want to get to Philadelphia fast, multiple airlines offer direct flights from STL to PHL, including American Airlines and Southwest Airlines.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Philadelphia Airport, please visit our Customer Service Portal.
How long is the flight from STL to Philadelphia Airport?
If you were planning to drift into a long and blissful slumber during your St. Louis to Philadelphia flight, you may have to think again. The normal flight time between Lambert-St. Louis Intl. Airport (STL) and Philadelphia Airport is a mere 2 hours and 11 minutes — just enough to sit back and close your eyes for a short while.
What is the flight distance from Lambert Field to Philadelphia Airport?
After taking off from St. Louis Lambert International Airport, you’ll cover 810 mi before hitting Philadelphia Airport. That should be enough time to read a few chapters of your book or perhaps even squeeze in a nap.
What airlines fly from Lambert-St. Louis Intl. Airport (STL) to PHL?
If you want to get to Philadelphia from St. Louis, you’ll find a number of airlines offering direct flights. One of the most reputable carriers is American Airlines (AA), which has 86 flights each month. If you want more options, look up Southwest Airlines (WN). This airline operates 30 flights each month. Between the two, we’re sure you’ll find a deal to suit your travel plans.
What airlines have practices regarding COVID-19 in place and use social distancing?
From the moment you enter the departure terminal to when you leave the arrivals terminal, if you’re flying with American Airlines, Delta or Frontier Airlines you can be sure that COVID-19 measures and social distancing rules have been adhered to. Many airlines have introduced capped capacity flights and keeping the middle seat empty.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

 

Traveling From
Lambert-St. Louis Intl.
Traveling To
Philadelphia Intl.
Shortest Flight Time
4 hours 5 mins
Earliest Departure Time
6:40AM EDT
Latest Departure Time
7:35PM EDT
Lowest Flight Price
$69

Route Info

Flight path for flights from Lambert-St. Louis International Airport to Philadelphia International Airport


Origin:
STL - Lambert-St. Louis International Airport
Destination:
PHL - Philadelphia International Airport
Distance:
816.00 miles


Airlines & Aircraft Used on STL to PHL Flight Routes


Airline Carrier
Aircraft
American Airlines
Cessna light aircraft - single turboprop engine
Delta Air Lines
Boeing 737 all pax models
Jet Airways (India)
Boeing 737-800 (winglets) pax
Jet Airways (India)
Boeing 747-400 pax

Discover our best flights from St. Louis STL to Philadelphia PHL. 

With 20 airlines to choose from on Travelocity, you can easily find the best option for you. Use our filters to sort by price, compare airlines, and find the most convenient flight times. 

 

Find our best return flights from St. Louis STL to Philadelphia PHL at the right price  

Airfares to Philadelphia PHL from St. Louis STL currently cost between $69 and $105. It’s usually cheaper to book a round trip than two separate one-way flights. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way flights from St. Louis STL to Philadelphia PHL 

If you want to be flexible about when you return, or keep your travel options open ended, a one-way flight could be just the ticket! You’ll find one-way airfares from St. Louis STL to Philadelphia PHL on Travelocity starting at $34. Prices and availability subject to change. Additional terms may apply. 

 

Get to Philadelphia PHL from St. Louis STL quicker with direct flights. 

Get to Philadelphia faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to PHL from STL to take around 4 hour(s) 5 min(s).  

 

Find our cheapest airfares for flights from St. Louis STL to Philadelphia PHL

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to PHL from STL. Our Price Match Promise means if you find a lower rate on Travelocity.com or on another US-based website within 24 hours of booking, we’ll credit or refund the difference.  

 

Get our best airfare deals for your flight from St. Louis STL to Philadelphia PHL today 

If you’re flexible about when you travel, May is usually the cheapest month to fly from St. Louis STL to Philadelphia PHL. If you need to be more specific, search by date and arrival and departure times.Then, compare prices across different airlines, and sort results by lowest price first. 

 

Book flexible airline tickets for flights to Philadelphia PHL from St. Louis STL 

Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to PHL from STL have this option.  

 

Travel with confidence when you book flights to Philadelphia PHL from St. Louis STL with Travelocity 

We’ve secured fantastic deals with all the main airline carriers and it’s easy to compare, choose, and book with Travelocity. With 24/7 customer service and our free 'App', we’ll always keep you moving. 

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.