Cheap flights from Philadelphia to St. Louis (PHL - STL) from $97

This is the cheapest one-way flight price, found on 5/29. Prices may vary by date and flight preferences.
PHL — STL
Jun 4 — Jun 111

The best prices from Philadelphia to Lambert-St Louis are usually found in September or February, booked 31 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

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 2023: compare Philadelphia to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.

Popular in

June

Cheapest in

September

Round-trip from

$345

One-way from

$189
High demand for flights, 17% potential price rise
Best time to find cheap flights, 15% potential price drop
From Philadelphia to Lambert-St Louis
One-way flight from Philadelphia to Lambert-St Louis

PHL - STL

Price

$345 - $487

STL

Temperature

32 - 80.6 °F

STL

Rainfall

2.2 - 4.7 inches

Cheap flights from Philadelphia to St. Louis in May, June 2023

The best prices found for PHL to STL flights for May, June
These are some of the best deals we've found on flights to St. Louis in 2023 at this time. If these deals don't appeal to you, be sure to come back soon for more options.

Philadelphia to St. Louis 2023 flight deals

Cheap flights to St. Louis from Philadelphia found for this year
These are some of the best deals we've found on flights to St. Louis in 2023 at this time. If these deals don't appeal to you, be sure to come back soon for more options.

Cheap Spirit Airlines flights from Philadelphia to St. Louis

Check out some of the cheapest Spirit Airlines flights we've come across from Philadelphia to St. Louis. It's recommended that users confirm their flight details before booking.

Cheap Frontier flights from Philadelphia to St. Louis

Some of the best deals we've found on Frontier flights traveling from Philadelphia to St. Louis. Deals are refreshing constantly so come back soon for more options.

Non-stop flights to St. Louis from Philadelphia

Save time with Philadelphia to St. Louis direct flight deals
Consider booking one of these non-stop flights heading from Philadelphia to St. Louis. Users can also choose from other Philadelphia to St. Louis flights by using the search form above.

Last minute flights from Philadelphia to St. Louis

Late deals on return flights to St. Louis from Philadelphia, departing today and this week
Have a look at some of the flights available from Philadelphia to St. Louis departing last-minute. Users should be sure to double check the price, date, and time of their last-minute flight.

One-way flights to St. Louis from Philadelphia

The cheapest one-way flights from Philadelphia to St. Louis
Take a look at some of the best available options we've come across on one-way flights from Philadelphia to St. Louis. Those seeking round-trip flights from Philadelphia to St. Louis should utilize the search form at the the top of the page.

Find flights from Philadelphia to St. Louis within your budget

Use the slider to find flights from Philadelphia to St. Louis that fit your budget.

Fly from

Any airport

Fly to

Any airport

Budget

$194 - $267

Route

Depart

Return

Price

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Tue 7/25

1 stop12h 17m

Lambert-St Louis

Tue 8/1

1 stop12h 44m

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Fri 6/9

1 stop13h 38m

Lambert-St Louis

Mon 6/12

1 stop16h 54m

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Wed 6/14

1 stop19h 10m

Lambert-St Louis

Thu 6/15

1 stop6h 33m

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Tue 6/13

1 stop19h 23m

Lambert-St Louis

Thu 6/15

1 stop22h 34m

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Tue 6/20

1 stop15h 07m

Lambert-St Louis

Tue 6/27

1 stop12h 44m

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Thu 6/29

1 stop7h 37m

Lambert-St Louis

Tue 7/11

1 stop12h 44m

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Thu 6/15

1 stop20h 39m

Lambert-St Louis

Fri 6/16

1 stop7h 33m

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Sat 6/10

1 stop13h 40m

Lambert-St Louis

Mon 6/12

1 stop16h 54m

PhiladelphiaLambert-St Louis

PHL - STL

PHLSTL

Philadelphia

Tue 7/25

Nonstop2h 23m

Lambert-St Louis

Tue 9/5

1 stop6h 11m

Flights are sorted by cheapest first

Deals found on 5/29

Reviews of Airlines Servicing St. Louis

To help decide which airline to fly from Philadelphia to St. Louis, see what other customers have to say about Spirit Airlines, Frontier and American Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
2,360 reviews

Overall

8.0

Boarding

8.1

Comfort

7.9

Food

7.2

Entertainment

7.8

Crew

8.5

Reviews

1 / 10

Our 10:30 am flight was cancelled. They re-booked us on a 3 pm flight which was cancelled at noon. We missed a wedding because of this.

Delta
8.0
Very good
2,360 reviews
Delta
8.0
Very good
2,360 reviews

Overall

8.0

Boarding

8.1

Comfort

7.9

Food

7.2

Entertainment

7.8

Crew

8.5

Reviews

1 / 10

Our 10:30 am flight was cancelled. They re-booked us on a 3 pm flight which was cancelled at noon. We missed a wedding because of this.

American Airlines
7.4
Good
2,147 reviews
Delta
8.0
Very good
2,360 reviews

Overall

8.0

Boarding

8.1

Comfort

7.9

Food

7.2

Entertainment

7.8

Crew

8.5

Reviews

1 / 10

Our 10:30 am flight was cancelled. They re-booked us on a 3 pm flight which was cancelled at noon. We missed a wedding because of this.

Spirit Airlines
6.6
Okay
1,025 reviews
Delta
8.0
Very good
2,360 reviews

Overall

8.0

Boarding

8.1

Comfort

7.9

Food

7.2

Entertainment

7.8

Crew

8.5

Reviews

1 / 10

Our 10:30 am flight was cancelled. They re-booked us on a 3 pm flight which was cancelled at noon. We missed a wedding because of this.

Frontier
5.9
Fair
661 reviews
Delta
8.0
Very good
2,360 reviews

Overall

8.0

Boarding

8.1

Comfort

7.9

Food

7.2

Entertainment

7.8

Crew

8.5

Reviews

1 / 10

Our 10:30 am flight was cancelled. They re-booked us on a 3 pm flight which was cancelled at noon. We missed a wedding because of this.

Related info for your journey

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

Alternative routes for Philadelphia to St. Louis

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

Top 4 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
Spirit AirlinesCheapest$92Average$189FlexibilityNo cancel feeOn-time65%COVID-19 safety
Search Spirit Airlines flights
FrontierCheapest$159Average$210FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search Frontier flights
American AirlinesCheapest$267Average$440FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights
DeltaCheapest$300Average$430FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights

Hourly flight availability from Philadelphia to St. Louis

See what time of day planes typically take off from Philadelphia to St. Louis
0%of flight departuresEarly morningMidnight to 6 am
30%of flight departuresMorning6 am to noon
70%of flight departuresAfternoonNoon to 6 pm
0%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
Sunday3daily flights
Monday4daily flights
Tuesday4daily flights
Wednesday3daily flights
Thursday4daily flights
Friday3daily flights
Saturday4daily flights
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