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

PHL — STL
Oct 2 — Oct 91

The best prices from Philadelphia to Lambert-St Louis are usually found in January or February, booked 24 days in advance, depart on a Tuesday or Thursday and return on a Monday

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

All the information you need to plan the best PHL to STL flight in 2022: compare Philadelphia to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.

PHL - STL

Price

$238 - $487

STL

Temperature

32 - 80.6 °F

STL

Rainfall

2.2 - 4.7 inches

Popular inJuneHigh demand for flights, 29% potential price rise
Cheapest inJanuaryBest time to find cheap flights, 32% potential price drop
Round-trip from$238From Philadelphia to Lambert-St Louis
One-way from$144One-way flight from Philadelphia to Lambert-St Louis

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

Saturday flights are found to be more expensive to fly from Philadelphia to St. Louis. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to St. Louis.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 23 days in advance, which can save you up to 34% on flights from Philadelphia to St. Louis compared to booking the week you need them. Waiting 23 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $372. For sooner than that we have options available in the next 3 days from $480.

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

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, January can be a great choice for travel to St. Louis. Flights to St. Louis from Philadelphia in January are about $348 on average during January, but can be found for as low as $197.

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

It’s optimal to fly from Philadelphia to St. Louis in the evening. By choosing this option you can save up to 26% on the cost of your flight, compared to a flight in the morning.

Cheap flights from Philadelphia to St. Louis in September, October 2022

The best prices found for PHL to STL flights for September, October
Oct 26 - Nov 2
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

6h 43m
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

13h 37m
$151

Frontier

Pick Dates

Deal found 9/26/22

Oct 19 - Oct 26
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

6h 43m
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

13h 37m
$156

Frontier

Pick Dates

Deal found 9/26/22

Oct 3 - Oct 4
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

6h 53m
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

6h 21m
$159

Frontier

Pick Dates

Deal found 9/25/22

Philadelphia to St. Louis 2022 flight deals

Cheap flights to St. Louis from Philadelphia found for this year
Oct 26 - Nov 2
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

6h 43m
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

13h 37m
$151

Frontier

Pick Dates

Deal found 9/26/22

Oct 19 - Oct 26
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

6h 43m
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

13h 37m
$156

Frontier

Pick Dates

Deal found 9/26/22

Oct 3 - Oct 4
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

6h 53m
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

6h 21m
$159

Frontier

Pick Dates

Deal found 9/25/22

Cheap Frontier flights from Philadelphia to St. Louis

Oct 26 - Nov 2
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

6h 43m
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

13h 37m
$151

Frontier

Pick Dates

Deal found 9/26/22

Oct 19 - Oct 26
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

6h 43m
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

13h 37m
$156

Frontier

Pick Dates

Deal found 9/26/22

Oct 3 - Oct 4
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

6h 53m
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

6h 21m
$159

Frontier

Pick Dates

Deal found 9/25/22

Cheap Spirit Airlines flights from Philadelphia to St. Louis

Oct 12 - Oct 17
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

26h 59m
STL

Lambert-St Louis

PHL

Philadelphia

2 stops

30h 17m
$195

Spirit Airlines

Pick Dates

Deal found 9/27/22

Nov 29 - Dec 6
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

13h 37m
STL

Lambert-St Louis

PHL

Philadelphia

2 stops

19h 02m
$197

Spirit Airlines

Pick Dates

Deal found 9/27/22

Oct 25 - Nov 1
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

15h 17m
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

20h 31m
$212

Spirit Airlines

Pick Dates

Deal found 9/26/22

Non-stop flights to St. Louis from Philadelphia

Save time with Philadelphia to St. Louis direct flight deals
Nov 12 - Nov 15
PHL

Philadelphia

STL

Lambert-St Louis

Nonstop

2h 34m
STL

Lambert-St Louis

PHL

Philadelphia

Nonstop

2h 05m
$278

American Airlines

Pick Dates

Deal found 9/25/22

Nov 2 - Nov 7
PHL

Philadelphia

STL

Lambert-St Louis

Nonstop

2h 29m
STL

Lambert-St Louis

PHL

Philadelphia

Nonstop

2h 05m
$298

American Airlines

Pick Dates

Deal found 9/26/22

Nov 11 - Nov 15
PHL

Philadelphia

STL

Lambert-St Louis

Nonstop

2h 35m
STL

Lambert-St Louis

PHL

Philadelphia

Nonstop

2h 05m
$307

American Airlines

Pick Dates

Deal found 9/24/22

Last minute flights from Philadelphia to St. Louis

Late deals on return flights to St. Louis from Philadelphia, departing today and this week
Oct 3 - Oct 4
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

6h 53m
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

6h 21m
$159

Frontier

Pick Dates

Deal found 9/25/22

Oct 5 - Oct 5
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

6h 43m
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

5h 56m
$164

Frontier

Pick Dates

Deal found 9/26/22

Oct 4 - Oct 8
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

8h 10m
STL

Lambert-St Louis

PHL

Philadelphia

1 stop

12h 46m
$165

Frontier

Pick Dates

Deal found 9/25/22

One-way flights to St. Louis from Philadelphia

The cheapest one-way flights from Philadelphia to St. Louis
Oct 26
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

6h 43m
$75

Frontier

Pick Dates

Deal found 9/26/22

Oct 15
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

7h 11m
$79

Frontier

Pick Dates

Deal found 9/24/22

Oct 3
PHL

Philadelphia

STL

Lambert-St Louis

1 stop

6h 53m
$80

Frontier

Pick Dates

Deal found 9/26/22

Related info for your journey

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

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

Lambert-St Louis is the airport most travelers will use when flying to St. Louis from Philadelphia. Booking flights from Philadelphia (PHL) to Lambert-St Louis (STL) should be relatively easy as there are 4 daily flights to St. Louis from 7 different airlines. 2h 27m is how long a flight from Philadelphia to Lambert-St Louis will take if you book a nonstop flight.

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

American Airlines, Frontier, and Sun Country Air 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 $200 on Cheapflights?

Yes, there are multiple flights from Philadelphia to St. Louis for under $200. The cheapest flight booked recently is on Frontier for just $151, but on average you can expect to pay $182.

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

Cheapflights has at least 20 direct flights from Philadelphia to St. Louis under $300. A good price for a nonstop flight from Philadelphia to St. Louis is less than $366.

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.

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

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

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

This flight path from Philadelphia to Lambert-St Louis was viewed by 79 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

Per day, 2 flights depart from Philadelphia to St. Louis on average.
Evening (6pm - Midnight) - 100% of flight departures

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

Airlines like Frontier and Spirit Airlines fly from Philadelphia to St. Louis in about 6h 43m. The time it takes to get you to your destination can typically vary by up to 20h 16m. The distance between Philadelphia and St. Louis is about 816 mi. This flight may include one or multiple stops.

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

Cheapflights users have booked flights from Philadelphia to St. Louis round-trip from $151. Another airline that can offer you cheap pricing is Spirit Airlines. These flights start at 56% lower than the current average price 3 months from now.

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

The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $75. However, be on the lookout for offers from Spirit Airlines and American Airlines, as they are both options that can get you from Philadelphia to St. Louis for a low price.

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

When booking a flight from Philadelphia to St. Louis, you may want to consider flying on American Airlines, Delta or Frontier as they are the most popular for this route.

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

Consider PSA Airlines (82%), British Airways (76%) or American Airlines (72%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to St. Louis.

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

Looking for the cheapest flight from Philadelphia to St. Louis? While on average our users pay $572, our data indicates the cheapest price to be $51. The most popular route (Philadelphia - Lambert-St Louis), is priced around $167.

Alternative routes for Philadelphia to St. Louis

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

Top 7 airlines flying 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.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
Juneyao AirlinesCheapest$12Average$22FlexibilityNo cancel feeOn-time66%COVID-19 safety
Search Juneyao Airlines flights
Sun Country AirCheapest$81Average$144FlexibilityNo cancel feeOn-time83%COVID-19 safety
Search Sun Country Air flights
Spirit AirlinesCheapest$93Average$161FlexibilityNo cancel feeOn-time65%COVID-19 safety
Search Spirit Airlines flights
FrontierCheapest$120Average$179FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search Frontier flights
United AirlinesCheapest$124Average$325FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights
DeltaCheapest$190Average$353FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
American AirlinesCheapest$195Average$411FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights

Hourly flight availability from Philadelphia to St. Louis

See what time of day planes typically take off from Philadelphia to St. Louis
17%of flight departuresEarly morningMidnight to 6 am
23%of flight departuresMorning6 am to noon
40%of flight departuresAfternoonNoon to 6 pm
20%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Philadelphia to St. Louis

See how many times per day planes take to the skies headed from Philadelphia to St. Louis
Sunday2daily flights
Monday6daily flights
Tuesday6daily flights
Wednesday4daily flights
Thursday4daily flights
Friday4daily flights
Saturday3daily flights