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Cheap flights Chicago to St Louis (Lambert-St. Louis)

1 passenger, economy

Cheap flights Chicago to St Louis

Compare prices, duration and stops

United Airlines
UA 2000
19:07
Chicago, O'Hare International Airport (ORD)
Tue, 15 sep
1h 31min
Direct
20:38
St Louis, Lambert-St. Louis (STL)
Tue, 15 sep
363 S$
American Airlines
AA 3069
04:05
Chicago, O'Hare International Airport (ORD)
Wed, 16 sep
1h 22min
Direct
05:27
St Louis, Lambert-St. Louis (STL)
Wed, 16 sep
208 S$
American Airlines
AA 3069
04:05
Chicago, O'Hare International Airport (ORD)
Fri, 18 sep
1h 22min
Direct
05:27
St Louis, Lambert-St. Louis (STL)
Fri, 18 sep
208 S$
Frontier Airlines
F9 2292
11:25
Chicago, Chicago Midway International Airport (MDW)
Fri, 18 sep
6h 45min
1 stop
18:10
St Louis, Lambert-St. Louis (STL)
Fri, 18 sep
183 S$
Frontier Airlines
F9 1483
11:30
Chicago, O'Hare International Airport (ORD)
Sat, 19 sep
12h 47min
1 stop
00:17
St Louis, Lambert-St. Louis (STL)
Sun, 20 sep +1
189 S$
Frontier Airlines
F9 1596
15:26
Chicago, O'Hare International Airport (ORD)
Sun, 20 sep
26h 44min
1 stop
18:10
St Louis, Lambert-St. Louis (STL)
Mon, 21 sep +1
121 S$
Frontier Airlines
F9 2292
11:25
Chicago, Chicago Midway International Airport (MDW)
Mon, 21 sep
6h 45min
1 stop
18:10
St Louis, Lambert-St. Louis (STL)
Mon, 21 sep
91 S$
American Airlines
AA 3069
04:05
Chicago, O'Hare International Airport (ORD)
Tue, 22 sep
1h 22min
Direct
05:27
St Louis, Lambert-St. Louis (STL)
Tue, 22 sep
205 S$
United Airlines
UA 2000
19:07
Chicago, O'Hare International Airport (ORD)
Tue, 22 sep
1h 31min
Direct
20:38
St Louis, Lambert-St. Louis (STL)
Tue, 22 sep
277 S$
Frontier Airlines
F9 1596
11:20
Chicago, O'Hare International Airport (ORD)
Wed, 23 sep
6h 50min
1 stop
18:10
St Louis, Lambert-St. Louis (STL)
Wed, 23 sep
93 S$
American Airlines
AA 2818
13:55
Chicago, O'Hare International Airport (ORD)
Thu, 24 sep
1h 23min
Direct
15:18
St Louis, Lambert-St. Louis (STL)
Thu, 24 sep
218 S$
Contour Airlines
LF 3046
17:30
Chicago, O'Hare International Airport (ORD)
Thu, 24 sep
24h 51min
3 stops
18:21
St Louis, Lambert-St. Louis (STL)
Fri, 25 sep +1
272 S$
Frontier Airlines
F9 1483
11:30
Chicago, O'Hare International Airport (ORD)
Sat, 26 sep
12h 47min
1 stop
00:17
St Louis, Lambert-St. Louis (STL)
Sun, 27 sep +1
139 S$
Frontier Airlines
F9 2292
11:25
Chicago, Chicago Midway International Airport (MDW)
Sun, 27 sep
30h 45min
1 stop
18:10
St Louis, Lambert-St. Louis (STL)
Mon, 28 sep +1
182 S$
Allegiant Air
G4 341
20:53
Chicago, Chicago Rockford International Airport (RFD)
Sun, 27 sep
21h 28min
2 stops
18:21
St Louis, Lambert-St. Louis (STL)
Mon, 28 sep +1
184 S$
Frontier Airlines
F9 1442
00:28
Chicago, O'Hare International Airport (ORD)
Mon, 28 sep
17h 42min
1 stop
18:10
St Louis, Lambert-St. Louis (STL)
Mon, 28 sep
121 S$
Southwest Airlines
WN 3877 Best price
15:10
Chicago, Chicago Midway International Airport (MDW)
Wed, 30 sep
1h 10min
Direct
16:20
St Louis, Lambert-St. Louis (STL)
Wed, 30 sep
75 S$
American Airlines
AA 2818
13:55
Chicago, O'Hare International Airport (ORD)
Fri, 2 oct
1h 23min
Direct
15:18
St Louis, Lambert-St. Louis (STL)
Fri, 2 oct
112 S$
American Airlines
AA 2818
13:50
Chicago, O'Hare International Airport (ORD)
Sat, 3 oct
1h 23min
Direct
15:13
St Louis, Lambert-St. Louis (STL)
Sat, 3 oct
77 S$
Allegiant Air
G4 344
18:56
Chicago, Chicago Rockford International Airport (RFD)
Sun, 4 oct
23h 25min
2 stops
18:21
St Louis, Lambert-St. Louis (STL)
Mon, 5 oct +1
198 S$
Southwest Airlines
WN 2779
01:50
Chicago, Chicago Midway International Airport (MDW)
Wed, 14 oct
1h 15min
Direct
03:05
St Louis, Lambert-St. Louis (STL)
Wed, 14 oct
172 S$
American Airlines
AA 2208
14:30
Chicago, O'Hare International Airport (ORD)
Thu, 29 oct
1h 21min
Direct
15:51
St Louis, Lambert-St. Louis (STL)
Thu, 29 oct
116 S$
Southwest Airlines
WN 806
16:05
Chicago, Chicago Midway International Airport (MDW)
Thu, 29 oct
1h 10min
Direct
17:15
St Louis, Lambert-St. Louis (STL)
Thu, 29 oct
168 S$
Frontier Airlines
F9 1596
15:26
Chicago, O'Hare International Airport (ORD)
Fri, 30 oct
7h 14min
1 stop
22:40
St Louis, Lambert-St. Louis (STL)
Fri, 30 oct
158 S$
Southwest Airlines
WN 2015
11:05
Chicago, Chicago Midway International Airport (MDW)
Sat, 31 oct
1h 10min
Direct
12:15
St Louis, Lambert-St. Louis (STL)
Sat, 31 oct
172 S$
Frontier Airlines
F9 1596
16:26
Chicago, O'Hare International Airport (ORD)
Mon, 2 nov
7h 14min
1 stop
23:40
St Louis, Lambert-St. Louis (STL)
Mon, 2 nov
144 S$
Frontier Airlines
F9 1483
12:30
Chicago, O'Hare International Airport (ORD)
Fri, 6 nov
12h 44min
1 stop
01:14
St Louis, Lambert-St. Louis (STL)
Sat, 7 nov +1
108 S$
Southwest Airlines
WN 459
17:10
Chicago, Chicago Midway International Airport (MDW)
Fri, 6 nov
1h 10min
Direct
18:20
St Louis, Lambert-St. Louis (STL)
Fri, 6 nov
168 S$
Southwest Airlines
WN 2737
17:30
Chicago, Chicago Midway International Airport (MDW)
Mon, 14 dec
1h 10min
Direct
18:40
St Louis, Lambert-St. Louis (STL)
Mon, 14 dec
76 S$

Low price calendar

September 2026
Price chart (September 2026)
min: 75 S$ · max: 363 S$
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Wed
Thu
Fri
Sat
Sun
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15
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363 S$
16
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208 S$
17
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18
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183 S$
19
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189 S$
20
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121 S$
21
Good deal
91 S$
22
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205 S$
23
Good deal
93 S$
24
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218 S$
25
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26
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139 S$
27
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184 S$
28
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121 S$
29
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30
Good deal
75 S$

Cheap flights Chicago to St Louis

Southwest Airlines
Southwest Airlines
Mon, Wed, Thu, Fri, Sat
Price from
S$76
American Airlines
American Airlines
Tue, Wed, Thu, Fri, Sat
Price from
S$77
Frontier Airlines
Frontier Airlines
Mon, Wed, Fri, Sat, Sun
Price from
S$91
Allegiant Air
Allegiant Air
Sun
Price from
S$184
Contour Airlines
Contour Airlines
Thu
Price from
S$272
United Airlines
United Airlines
Tue
Price from
S$277

Popular destinations from Chicago

All →
CHI
Chicago — Orlando
United States → United States
ORL
from
S$27
CHI
Chicago — Orlando
United States → United States
MCO
from
S$27
CHI
Chicago — Atlanta
United States → United States
ATL
from
S$28
CHI
Chicago — Houston
United States → United States
IAH
from
S$28
CHI
Chicago — Houston
United States → United States
HOU
from
S$28
CHI
Chicago — New York
United States → United States
NYC
from
S$30
CHI
Chicago — Denver
United States → United States
DEN
from
S$30
CHI
Chicago — Fort Lauderdale
United States → United States
FLL
from
S$31
CHI
Chicago — Miami
United States → United States
MIA
from
S$31

Popular destinations to St Louis

All →
DEN
Denver — St Louis
United States → United States
STL
from
S$50
MSP
Minneapolis — St Louis
United States → United States
STL
from
S$63
MIA
Miami — St Louis
United States → United States
STL
from
S$86
BNA
Nashville — St Louis
United States → United States
STL
from
S$90
HOU
Houston — St Louis
United States → United States
STL
from
S$97
PHL
Philadelphia — St Louis
United States → United States
STL
from
S$98
DFW
Dallas — St Louis
United States → United States
STL
from
S$112
NYC
New York — St Louis
United States → United States
STL
from
S$115

Cheap flights Chicago to St Louis

Interesting facts about the route

Flight time

1h 31min

Distance

415 km

Average price

S$170

Most frequent flight

F9 1596

Passenger reviews

No reviews for this route yet

Internet abroad

eSIM · United States

All plans

change

3 GB

data

30

days

S$11

Buy

change

2 GB

data

15

days

S$16

Buy

change

5 GB

data

30

days

S$18

Buy

change

3 GB

data

30

days

S$20

Buy

change

5 GB

data

30

days

S$29

Buy

Frequently Asked Questions

The average ticket price Chicago St Louis is S$170. The cheapest ticket costs S$183, operated by Frontier Airlines, flight 2292, departing Chicago on 18 September at 11:25, arriving St Louis on 18 September at 18:10.
The average flight time is 1 hour 31 minutes. The fastest flight takes 1 hour 22 minutes, flight 3069 operated by American Airlines, departing Chicago on 16 September at 04:05, arriving St Louis on 16 September at 05:27.
Flights on the Chicago - St Louis route are operated by the following airlines: American Airlines, Frontier Airlines, Allegiant Air, Contour Airlines, United Airlines, Southwest Airlines.
The distance from Chicago to St Louis is 415 km.