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

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The best prices from Philadelphia to St Louis are usually found in August or July, booked 53 days in advance, depart on a Saturday or Wednesday and return on a Thursday

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

PHL - STL
Price
$198 - $368
STL
Temperature
44.6 - 89.6 °F
STL
Rainfall
2.2 - 5.1 inches

Popular in

November

High demand for flights, 12% potential price rise

Cheapest in

August

Best time to find cheap flights, 39% potential price drop

Round-trip from

$198

From Philadelphia to St Louis

One-way from

$123

One-way flight from Philadelphia to St Louis

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Philadelphia to St Louis?

It’s generally more expensive to depart on a Friday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

To save up to 96% on this flight, we recommend booking at least 31 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Philadelphia to St Louis from $374 1-2 weeks out and tickets from $553 for flights departing within the next 72 hours.

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

August can be a great time to fly to St Louis from Philadelphia with a flight ticket averaging about $266. Cheapflights users have found deals in the month of August for as cheap as $158. The most expensive prices can be found in the month of December.

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

It’s typically best to fly out from Philadelphia to St Louis in the evening. Doing so could potentially save you 9% on the flight price compared to flying in the morning, which is usually more expensive.

Cheap flights from Philadelphia to St Louis in November, December 2020

The best prices found for PHL to STL flights for November, December
14 Dec - 4 Jan
$68pp
PHL
Philadelphia
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
PHL
Philadelphia
6 Dec - 7 Jan
$108pp
PHL
Philadelphia
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
PHL
Philadelphia
12 Dec - 9 Jan
$120pp
PHL
Philadelphia
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
PHL
Philadelphia

Philadelphia to St Louis 2021 flight deals

Cheap flights to St Louis from Philadelphia found for next year
14 Dec - 4 Jan
$68pp
PHL
Philadelphia
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
PHL
Philadelphia
6 Dec - 7 Jan
$108pp
PHL
Philadelphia
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
PHL
Philadelphia
12 Dec - 9 Jan
$120pp
PHL
Philadelphia
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
PHL
Philadelphia

Non-stop flights to St Louis from Philadelphia

Save time with Philadelphia to St Louis direct flight deals
19 Dec - 30 Dec
$197pp
PHL
Philadelphia
American Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
PHL
Philadelphia
22 Dec - 27 Dec
$217pp
PHL
Philadelphia
American Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
PHL
Philadelphia
22 Jan - 24 Jan
$237pp
PHL
Philadelphia
American Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
PHL
Philadelphia

Last minute flights from Philadelphia to St Louis

Late deals on round-trip flights to St Louis from Philadelphia, departing today and this week
6 Dec - 7 Jan
$108pp
PHL
Philadelphia
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
PHL
Philadelphia
7 Dec - 15 Dec
$133pp
PHL
Philadelphia
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
PHL
Philadelphia
4 Dec - 7 Dec
$138pp
PHL
Philadelphia
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
PHL
Philadelphia

One-way flights to St Louis from Philadelphia

The cheapest one-way flights from Philadelphia to St Louis
10:35 am - 1:16 pm
Frontier
2 Stops
27h 41m
PHL - STL
Frontier
$123
Kiwi.com
4:38 pm - 11:09 am
Multiple Airlines
3 Stops
43h 31m
PHL - STL
Multiple Airlines
$229
Kiwi.com
1:30 pm - 6:09 pm
Delta
1 Stop
5h 39m
PHL - STL
Delta
$298
Delta

Related info for your journey

Useful info, stats and facts about Philadelphia to St Louis flights.

Flight FAQs

From Philadelphia to St Louis

Are flight prices decreasing from Philadelphia to St Louis due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Philadelphia and St Louis for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Philadelphia to Lambert-St Louis to control the spread of COVID-19?

Airlines globally have implemented additional safety measures to accommodate you. Southwest and Delta are some airlines that have done so. New policies for travelers booking flights from Philadelphia to Lambert-St Louis include masks being provided and required on board, daily cleaning and sanitization, use of HEPA filters, pre-flight testing for antibodies and symptoms, and socially distanced seating (for a limited time). Keep in mind that policies will vary by airline.

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

American Airlines, Frontier, and Delta are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Can I find flights from Philadelphia to St Louis for under $100 on Cheapflights?

Yes, there are multiple flights from Philadelphia to St Louis for under $100. The cheapest flight booked recently is on Frontier for just $68, but on average you can expect to pay $138.

Are there nonstop flights from Philadelphia to St Louis for under $200 on Cheapflights?

Cheapflights has at least 11 direct flights from Philadelphia to St Louis under $200. A good price for a nonstop flight from Philadelphia to St Louis is less than $342.

Are there last-minute flights available from Philadelphia to St Louis for under $200?

There are currently 20+ open flights from Philadelphia to St Louis within the next 7 days for less than $200.

Does it rain more in Philadelphia or St Louis?

When traveling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Philadelphia is roughly less than St Louis. You can assume this to be the case over the next 13 days.

Is Philadelphia weather warmer or cooler than St Louis?

With an average temperature of 90 °F, peak weather can be found in July. As a traveler, expect to see changes in flight prices during that period. The temperatures in St Louis are hotter than in Philadelphia.

How long is the flight from Philadelphia to St Louis?

Airlines like American Airlines and Frontier fly from Philadelphia to St Louis in about 2h 44m. The time it takes to get you to your destination can typically vary by up to 3h 51m. This flight may include one or multiple stops.

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

Flying on Frontier is currently your cheapest option to St Louis, with prices starting at $68. Another option worth looking into is American Airlines, starting at $177 round trip. You may be able to fly from Philadelphia to St Louis for 79% less than the average price by searching for these airlines.

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

$40 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $99 and $187, respectively.

Alternative routes for Philadelphia to St Louis

Destination information for St Louis

Things to know before you go. Useful info for your trip from Philadelphia to St Louis
Flight duration
2h 28m
Average temperature for November in St Louis
57.2 °F
Avg rainfall for November in St Louis
3.4 ″

Airports servicing Philadelphia

Airports servicing St. Louis

Top 6 airlines from Philadelphia to St Louis

The chart below displays the airlines Cheapflights users traveling from Philadelphia to St Louis 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
Sun Country Air
$81 $144 N/A 83%
Frontier
$106 $247 No cancel fee 62%
Delta
$107 $303 No cancel fee N/A
United Airlines
$147 $384 No cancel fee 69%
American Airlines
$245 $427 No cancel fee 71%
Southwest
$283 $474 No cancel fee 63%

Hourly flight availability from Philadelphia to St Louis

Morning 6 AM to noon 42% of PHL to STL departures
Evening 6 PM to midnight 37% of PHL to STL departures
Afternoon Noon to 6 PM 20% of PHL to STL departures
Early morning Midnight to 6 AM 1% of PHL to STL departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Philadelphia to St Louis
Sunday
5 daily flights
Monday
5 daily flights
Tuesday
4 daily flights
Wednesday
5 daily flights
Thursday
0 flights
Friday
2 daily flights
Saturday
3 daily flights
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