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Cheap flights Philadelphia (Philadelphia International) to St Louis (Lambert-St. Louis)

1 passenger, economy

Cheap flights Philadelphia to St Louis

Compare prices, duration and stops

Frontier Airlines
F9 2507
14:10
Philadelphia, Philadelphia International (PHL)
Sun, 20 sep
7h 24min
1 stop
21:34
St Louis, Lambert-St. Louis (STL)
Sun, 20 sep
113 $
Frontier Airlines
F9 1147
21:32
Philadelphia, Philadelphia International (PHL)
Sun, 20 sep
20h 38min
1 stop
18:10
St Louis, Lambert-St. Louis (STL)
Mon, 21 sep +1
79 $
Frontier Airlines
F9 2297 Best price
12:41
Philadelphia, Philadelphia International (PHL)
Mon, 21 sep
5h 29min
1 stop
18:10
St Louis, Lambert-St. Louis (STL)
Mon, 21 sep
77 $

Low price calendar

September 2026
Price chart (September 2026)
min: 77 $ · max: 113 $
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113 $
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77 $
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Cheap flights Philadelphia to St Louis

Frontier Airlines
Frontier Airlines
Mon, Sun
Price from
$113

Popular destinations from Philadelphia

All →
PHL
Philadelphia — Atlanta
United States → United States
ATL
from
$19
PHL
Philadelphia — Miami
United States → United States
MIA
from
$23
PHL
Philadelphia — Fort Lauderdale
United States → United States
FLL
from
$23
PHL
Philadelphia — Tampa
United States → United States
TPA
from
$26
PHL
Philadelphia — Myrtle Beach
United States → United States
MYR
from
$29
PHL
Philadelphia — Orlando
United States → United States
ORL
from
$30
PHL
Philadelphia — Tampa
United States → United States
PIE
from
$33
PHL
Philadelphia — Orlando
United States → United States
MCO
from
$44
PHL
Philadelphia — Denver
United States → United States
DEN
from
$46

Popular destinations to St Louis

All →
DEN
Denver — St Louis
United States → United States
STL
from
$40
CHI
Chicago — St Louis
United States → United States
STL
from
$46
MSP
Minneapolis — St Louis
United States → United States
STL
from
$50
MIA
Miami — St Louis
United States → United States
STL
from
$68
BNA
Nashville — St Louis
United States → United States
STL
from
$71
HOU
Houston — St Louis
United States → United States
STL
from
$77
DFW
Dallas — St Louis
United States → United States
STL
from
$88
NYC
New York — St Louis
United States → United States
STL
from
$91

Cheap flights Philadelphia to St Louis

Interesting facts about the route

Flight time

7h 24min

Distance

1 305 km

Average price

$113

Most frequent flight

F9 1147

Passenger reviews

No reviews for this route yet

Internet abroad

eSIM · United States

All plans

change

3 GB

data

30

days

$9

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2 GB

data

15

days

$13

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5 GB

data

30

days

$14

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3 GB

data

30

days

$16

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5 GB

data

30

days

$23

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Frequently Asked Questions

The average ticket price Philadelphia St Louis is $113. Check flight options below for current prices.
The average flight time is 7 hours 24 minutes.
Flights on the Philadelphia - St Louis route are operated by the following airlines: Frontier Airlines.
The distance from Philadelphia to St Louis is 1305 km.