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Cheap flights Chicago — St Louis

Chicago (CHI, US) St Louis (STL, US)
from $87 422 km ~1h 14 flights found 5 airlines cheapest on Friday
Reverse route
How many travellers?
Adults
12+ years
1
Children
2–11 years
0
Infants
under 2
0
Choose your departure date
Cheapest: $87 on 21.12.2026
Prices shown are from searches by other travellers over the last 24 hours. Missing a date? Click any day — we'll find tickets anyway.
November 2026
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December 2026
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January 2027
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Prices found for 5 of 90 days. Prices update as more travellers search. Click any date to search live.
Depart
—
Return
—
Cheapest flights found
22 Dec 2026, Tue
United Airlines UA 4437
02:29
ORD O'Hare International Airport
04:02
STL Lambert-St. Louis International Airport
1h 33m Direct
Kiwi.com
$87
View this ticket
16 Nov 2026, Mon
United Airlines UA 2844
19:45
ORD O'Hare International Airport
21:10
STL Lambert-St. Louis International Airport
1h 25m Direct
Clickavia
$106
View this ticket
Route characteristics
Distance
422 km
Flight time
1h
Time difference
+0h
Minimum price
from $87 (21.12.2026)
Average price
$107
Maximum price
$128
Departures per week
1
Cheapest day
Friday
Departure airports (3)
MDW Chicago Midway International Airport ORD O'Hare International Airport RFD Chicago Rockford International Airport
Arrival airports (1)
STL Lambert-St. Louis International Airport
Airlines (5)
UA United Airlines AA American Airlines F9 Frontier Airlines G4 Allegiant Air WN Southwest Airlines
Agencies (4)
Kiwi.com Farera Clickavia Tickets
Prices by day of week
Monday
$106
avg $106
Tuesday
$87
avg $87
Price trend by month
November 2026
from $106
avg $106
1 flights
December 2026
from $87
avg $87
1 flights
Airlines — cheapest prices 5
United Airlines
United Airlines
4 flights · 4 days
$87
American Airlines
American Airlines
4 flights · 4 days
$101
Frontier Airlines
Frontier Airlines
Low-cost 3 flights · 3 days
$141
Allegiant Air
Allegiant Air
Low-cost 1 flights · 1 days
$150
Southwest Airlines
Southwest Airlines
Low-cost 2 flights · 2 days
$209
Where to buy tickets 4
Kiwi.com
1 tickets · 1 days
from $87
Farera
11 tickets · 8 days
from $101
Clickavia
1 tickets · 1 days
from $106
Tickets
1 tickets · 1 days
from $150
Airports

From — Chicago (3)

  • MDW Chicago Midway International Airport
  • ORD O'Hare International Airport
  • RFD Chicago Rockford International Airport

To — St Louis (1)

  • STL Lambert-St. Louis International Airport
Other destinations from Chicago
Las Vegas
US · Hub
Denver
US · Hub
Nashville
US
Fort Lauderdale
US
Minneapolis
US · Hub
Atlanta
US · Hub
Philadelphia
US · Hub
Boston
US
Tampa
US
Phoenix
US
New Orleans
US
Baltimore
US
Frequently asked questions about the route Chicago — St Louis
How long is the flight from Chicago to St Louis?
Approximate flight time — 1h. This is an average for a direct flight. With connections, the time may be longer.
What is the distance from Chicago to St Louis?
The straight-line distance — 422 km.
How much do flights from Chicago to St Louis cost?
The minimum price over 3 months — from $87 on 21.12.2026.
What is the average ticket price?
The average price — $107. Range: $87 — $128.
What is the time difference between Chicago and St Louis?
The difference — +0h.
From which airports does Chicago operate flights?
From Chicago: MDW (Chicago Midway International Airport), ORD (O'Hare International Airport), RFD (Chicago Rockford International Airport).
To which airports in St Louis do flights arrive?
To St Louis: STL (Lambert-St. Louis International Airport).
Which airlines fly this route?
This route is served by 5 airlines: United Airlines, American Airlines, Frontier Airlines, Allegiant Air, Southwest Airlines.
Are there direct flights?
Yes, there are direct flights. Minimum direct price — from $87. Total direct flights found: 2.
Which day of the week is cheapest?
The cheapest day of the week — Friday.
When is the best time to buy tickets?
Optimal — 1–3 months before departure. Check the calendar above — it shows the best dates.
How do I book flights?
Click "View this ticket" on any flight card — you'll be redirected to the booking page with this specific ticket pre-selected.
About the route Chicago — St Louis

Flights Chicago — St Louis is a popular route. The straight-line distance is 422 km. Flight time 1h. Time difference +0h.

From Chicago (CHI) flights depart from 3 airports: MDW, ORD, RFD. To St Louis (STL) — 1 arrival airport: STL.

5 airlines operate on this route: United Airlines, American Airlines, Frontier Airlines, Allegiant Air, Southwest Airlines.

The minimum price for the next 3 months — from $87 (21.12.2026). The cheapest dates are highlighted in the calendar above.

The average ticket price — $107, ranging from $87 to $128. Book 1–3 months in advance to get the best deals.

Cheapest day to fly — Friday.

Other destinations in United States from Chicago
Denver
US
Las Vegas
US
Nashville
US
Fort Lauderdale
US
Minneapolis
US
Atlanta
US
Philadelphia
US
Phoenix
US

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