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

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The best prices from Lambert-St Louis to Philadelphia are usually found in February or October, booked 35 days in advance, depart on a Wednesday or Saturday and return on a Tuesday

How to find the cheapest flight from
St. Louis (STL) to Philadelphia (PHL)

All the information you need to plan the best STL to PHL flight in 2022: compare St. Louis to Philadelphia flight prices with the expected peak season, weather and rainfall in Philadelphia.
STL - PHL
Price
$207 - $400
PHL
Temperature
33.8 - 78.8 °F
PHL
Rainfall
2.7 - 4.4 inches

Popular in

June

High demand for flights, 17% potential price rise

Cheapest in

February

Best time to find cheap flights, 38% potential price drop

Round-trip from

$207

From Lambert-St Louis to Philadelphia

One-way from

$154

One-way flight from Lambert-St Louis to Philadelphia

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
How far in advance should I book a flight from St. Louis to Philadelphia?

Users have found that booking a flight from St. Louis to Philadelphia at least 35 days early can save you up to 36% on average compared to booking a flight this week. If booking 35 days before your flight isn’t an option for you, users have found flights from St. Louis to Philadelphia for as little as $376 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $472 for flights departing within the next 3 days.

When is the cheapest time to fly from St. Louis to Philadelphia (STL - PHL)?

It’s typically best to fly out from St. Louis to Philadelphia in the evening. Doing so could potentially save you 62% on the flight price compared to flying at noon, which is usually more expensive.

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

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, February can be a great choice for travel to Philadelphia. Flights to Philadelphia from St. Louis in February are about $332 on average during February, but can be found for as low as $142.

What is the cheapest day to fly round-trip from St. Louis to Philadelphia?

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 11% when planning your travel around this day of the week.

Cheap flights from St. Louis to Philadelphia in June, July 2022

The best prices found for STL to PHL flights for June, July
13 Jul - 26 Jul
$202pp
STL
Lambert-St Louis
Frontier
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Frontier
 
1 STOP
STL
Lambert-St Louis
13 Jul - 19 Jul
$203pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
13 Jul - 19 Jul
$204pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Frontier
 
1 STOP
STL
Lambert-St Louis

Lambert-St Louis to Philadelphia 2022 flight deals

Cheap flights to Philadelphia from St. Louis found for this year
17 Aug - 24 Aug
$194pp
STL
Lambert-St Louis
Frontier
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Frontier
 
1 STOP
STL
Lambert-St Louis
13 Jul - 26 Jul
$202pp
STL
Lambert-St Louis
Frontier
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Frontier
 
1 STOP
STL
Lambert-St Louis
13 Jul - 19 Jul
$203pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis

Non-stop flights to Philadelphia from St. Louis

Save time with St. Louis to Philadelphia direct flight deals
20 Aug - 22 Aug
$288pp
STL
Lambert-St Louis
American Airlines
Non-Stop
PHL
Philadelphia
PHL
Philadelphia
American Airlines
Non-Stop
STL
Lambert-St Louis
8 Sep - 10 Sep
$303pp
STL
Lambert-St Louis
American Airlines
Non-Stop
PHL
Philadelphia
PHL
Philadelphia
American Airlines
Non-Stop
STL
Lambert-St Louis
30 Nov - 5 Jan
$312pp
STL
Lambert-St Louis
American Airlines
Non-Stop
PHL
Philadelphia
PHL
Philadelphia
American Airlines
Non-Stop
STL
Lambert-St Louis

Last minute flights from St. Louis to Philadelphia

Late deals on round-trip flights to Philadelphia from St. Louis, departing today and this week
9 Jul - 12 Jul
$220pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
9 Jul - 11 Jul
$221pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
6 Jul - 12 Jul
$226pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
PHL
Philadelphia
PHL
Philadelphia
Frontier
 
1 STOP
STL
Lambert-St Louis

One-way flights to Philadelphia from St. Louis

The cheapest one-way flights from St. Louis to Philadelphia
2:18 pm - 9:27 pm
Frontier
1 Stop
6h 09m
STL - PHL
Frontier
$154
CheapOair
2:38 pm - 4:45 am
Spirit Airlines
1 Stop
13h 07m
STL - PHL
Spirit Airlines
$167
Gotogate
2:26 am - 5:42 am
American Airlines
Nonstop
2h 16m
STL - PHL
American Airlines

Related info for your journey

Useful info, stats and facts about <span class="emphasized">St. Louis</span> to <span class="emphasized">Philadelphia</span> flights.

Flight FAQs

From St. Louis to Philadelphia

What airports do I use to fly from St. Louis to Philadelphia?

Booking a flight from Lambert-St Louis (STL) to Philadelphia (PHL) is your only option if you wish to fly from St. Louis to Philadelphia. On a typical day, there are 7 flights from Lambert-St Louis to Philadelphia, all of which are around 2h 07m for a nonstop flight. You can also purchase a plane ticket from 8 airlines when you book a flight from Lambert-St Louis to Philadelphia.

Which airlines flying from Lambert-St Louis to Philadelphia have flexible cancellations due to COVID-19?

Some of our airline partners flying from Lambert-St Louis to Philadelphia have new flexible policies in place due to COVID-19. American Airlines, Delta, and Spirit Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like American Airlines with this kind of flexibility.

Can I find flights from St. Louis to Philadelphia for under $200 on Cheapflights?

Yes, there are multiple flights from St. Louis to Philadelphia for under $200. The cheapest flight booked recently is on Frontier for just $194, but on average you can expect to pay $222.

Are there nonstop flights from St. Louis to Philadelphia for under $300 on Cheapflights?

Cheapflights has at least 20 direct flights from St. Louis to Philadelphia under $300. A good price for a nonstop flight from St. Louis to Philadelphia is less than $363.

Are there last-minute flights available from St. Louis to Philadelphia for under $300?

There are currently 20+ open flights from St. Louis to Philadelphia within the next 7 days for less than $300.

What days are nonstop flights available from St. Louis to Philadelphia?

You can find nonstop flights on the following days: Saturday.

How popular is this St. Louis to Philadelphia flight route?

Within the past month, 60 users have taken a look at flights from Lambert-St Louis to Philadelphia.

How many flights depart from St. Louis to Philadelphia on average per day?

On average 4 flights depart from St. Louis to Philadelphia per day.
Early Morning (Midnight to 6am) - 50% of flight departures
Afternoon (Noon - 6pm) - 50% of flight departures

How long is the flight from St. Louis to Philadelphia?

There are many flights that can get you from St. Louis to Philadelphia in 5h 50m. Fly via Frontier or American Airlines to get the fastest option. Airlines will cover a distance of 816 mi. This flight may include one or multiple stops.

What are the cheapest airlines flying from St. Louis to Philadelphia round-trip?

Cheapflights users have booked flights from St. Louis to Philadelphia round-trip from $194. Another airline that can offer you cheap pricing is American Airlines. These flights start at 41% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from St. Louis to Philadelphia one-way?

For one-way options, check prices for Frontier. According to our data, you can fly for as low as $106. Users have also found prices from $115 and $119 on Spirit Airlines and American Airlines, respectively.

What are the most popular airlines that fly from St. Louis to Philadelphia?

The most popular airlines flying from St. Louis to Philadelphia are American Airlines, Delta and Frontier. Something to consider prior to booking your flight.

What are the cheapest flights from St. Louis to Philadelphia?

While on average a flight from St. Louis to Philadelphia is generally $1,051, our data shows the cheapest flight currently is $24. When looking at the most popular route, (Lambert-St Louis - Philadelphia), you can expect to pay $222 for that flight.

What are the most reliable airlines from St. Louis to Philadelphia?

No one likes to see their flight delayed. When booking a flight from St. Louis to Philadelphia consider choosing PSA Airlines (89%), British Airways (78%) or Qatar Airways (77%) as they are the most reliable in getting you off to your destination on time.

COVID Restrictions

View COVID Travel Restrictions for Philadelphia, PA

Do I need a COVID test to fly to Philadelphia from St. Louis?

Information is based on travel restrictions for travel to Philadelphia within the United States

Most visitors from Lambert-St Louis need to provide a negative COVID-19 test result and/or quarantine to enter Philadelphia.

COVID-19 testing requirements
Visitors from Lambert-St Louis are not required to present a negative COVID-19 PCR test or antigen result upon entering Philadelphia.

Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Philadelphia.

Do I need a test to fly back to St. Louis from Philadelphia?

Returning to Lambert-St Louis from Philadelphia

COVID-19 testing requirements
Visitors from Philadelphia are not required to present a negative COVID-19 PCR test or antigen result upon entering Lambert-St Louis.

Quarantine requirements
Visitors from Philadelphia are not required to quarantine after entering Lambert-St Louis.

Hide COVID Travel Restrictions for Philadelphia, PA

Alternative routes for St. Louis to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Philadelphia

Things to know before you go - useful duration and weather info for your trip from St. Louis to Philadelphia.
Average temperature for June in Philadelphia
84.2 °F
Avg rainfall for June in Philadelphia
3.7 ″

Airports servicing St. Louis

Airports servicing Philadelphia

Top 7 airlines flying from Lambert-St Louis to Philadelphia

The chart below displays the airlines Cheapflights users traveling from St. Louis to Philadelphia choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Juneyao Airlines
$11 $20 No cancel fee 66%

We couldn't confirm the COVID-19 safety measures taken by Juneyao Airlines. Please check directly on their website for additional information.

Frontier
$64 $195 No cancel fee 62%
Spirit Airlines
$77 $143 No cancel fee 65%
Sun Country Air
$106 $132 No cancel fee 83%
Delta
$110 $256 No cancel fee N/A
United Airlines
$131 $276 No cancel fee 69%
American Airlines
$191 $390 No cancel fee 71%

Hourly flight availability from St. Louis to Philadelphia

See what time of day planes typically take off from St. Louis towards Philadelphia.
Afternoon Noon to 6 PM 35% of STL to PHL departures
Early morning Midnight to 6 AM 27% of STL to PHL departures
Morning 6 AM to noon 27% of STL to PHL departures
Evening 6 PM to midnight 11% of STL to PHL departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from St. Louis to Philadelphia
See how many times per day planes take to the skies headed from St. Louis to Philadelphia.
Sunday
5 daily flights
Monday
10 daily flights
Tuesday
7 daily flights
Wednesday
10 daily flights
Thursday
9 daily flights
Friday
6 daily flights
Saturday
7 daily flights
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