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Cheap flights from Chicago to St Louis (CHI - STL)

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The best prices from Chicago to St Louis are usually found in July or May, booked 51 days in advance, depart on a Saturday or Wednesday and return on a Monday

How to find the cheapest flight from
Chicago (CHI) to St Louis (STL)

CHI - STL
Price
$128 - $284
STL
Temperature
44.6 - 89.6 °F
STL
Rainfall
2.2 - 5.1 inches

Popular in

March

High demand for flights, 18% potential price rise

Cheapest in

July

Best time to find cheap flights, 45% potential price drop

Round-trip from

$128

From Chicago to St Louis

One-way from

$69

One-way flight from Chicago to St Louis

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Chicago to St Louis?

Users have found that leaving on a Friday can be a cost-effective option. It’s possible to save up to 17% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from Chicago 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 31 days in advance, which can save you up to 96% on flights from Chicago to St Louis compared to booking the week you need them. Waiting 31 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 $374. For sooner than that we have options available in the next 3 days from $553.

What is the cheapest month to fly from Chicago to St Louis?

August can be a great time to fly to St Louis from Chicago with a flight ticket averaging about $266. Cheapflights users have found deals in the month of August for as cheap as $158. The most expensive prices can be found in the month of December.

When is the cheapest time to fly from Chicago to St Louis (CHI - STL)?

It’s typically best to fly out from Chicago to St Louis at noon. Doing so could potentially save you 15% on the flight price compared to flying in the afternoon, which is usually more expensive.

Cheap flights from Chicago to St Louis in December, January 2021

The best prices found for CHI to STL flights for December, January
5 Dec - 10 Jan
$120pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
21 Dec - 10 Jan
$124pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
13 Dec - 17 Feb
$125pp
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl

Chicago to St Louis 2021 flight deals

Cheap flights to St Louis from Chicago found for this year
5 Dec - 10 Jan
$120pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
21 Dec - 10 Jan
$124pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
13 Dec - 17 Feb
$125pp
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl

Non-stop flights to St Louis from Chicago

Save time with Chicago to St Louis direct flight deals
23 Dec - 26 Dec
$137pp
ORD
Chicago O'Hare Intl
American Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl
21 Dec - 10 Jan
$152pp
ORD
Chicago O'Hare Intl
American Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl
29 Dec - 29 Dec
$161pp
ORD
Chicago O'Hare Intl
American Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl

Last minute flights from Chicago to St Louis

Late deals on round-trip flights to St Louis from Chicago, departing today and this week
7 Dec - 8 Dec
$141pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
6 Dec - 7 Dec
$145pp
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
9 Dec - 12 Dec
$148pp
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Air Choice One
 
1 STOP
ORD
Chicago O'Hare Intl

One-way flights to St Louis from Chicago

The cheapest one-way flights from Chicago to St Louis
9:15 am - 10:36 am
United Airlines
Nonstop
1h 21m
ORD - STL
United Airlines
$69
United
12:15 pm - 4:10 am
Air Choice One
1 Stop
15h 55m
ORD - STL
Air Choice One
$77
Kiwi.com
9:07 am - 4:48 pm
American Airlines
1 Stop
7h 41m
ORD - STL
American Airlines

Related info for your journey

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

Flight FAQs

From Chicago to St Louis

Are flight prices decreasing from Chicago to St Louis due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Chicago and St Louis for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Chicago to Lambert-St Louis to control the spread of COVID-19?

New policies can now be found on Delta and Southwest to help keep travelers safe while flying. New policies for travelers booking flights from Chicago to Lambert-St Louis include masks being provided and required on board, daily cleaning and sanitization, use of HEPA filters, pre-flight testing for antibodies and symptoms, and socially distanced seating (for a limited time). Keep in mind that policies will vary by airline.

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

Due to the rapidly changing circumstances due to COVID-19, airlines like American Airlines, United Airlines, and Cape Air flying from Chicago to Lambert-St Louis have implemented new flexible cancellation policies.

Can I find flights from Chicago to St Louis for under $200 on Cheapflights?

Yes, there are multiple flights from Chicago to St Louis for under $200. The cheapest flight booked recently is on Frontier for just $124, but on average you can expect to pay $138.

Are there nonstop flights from Chicago to St Louis for under $200 on Cheapflights?

Cheapflights has at least 18 direct flights from Chicago to St Louis under $200. A good price for a nonstop flight from Chicago to St Louis is less than $1,672.

Are there last-minute flights available from Chicago to St Louis for under $200?

There are currently 20+ open flights from Chicago to St Louis within the next 7 days for less than $200.

What days are nonstop flights available from Chicago to St Louis?

Nonstop flights are available for this route on the following days: Sunday, Wednesday, Thursday, Saturday.

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

Travelers can expect 4 flights from Chicago to Lambert-St Louis on average per day.
Afternoon (Noon - 6pm) - 25% of flight departures
Evening (6pm - Midnight) - 75% of flight departures

Is Chicago weather warmer or cooler than St Louis?

Our data indicates that the weather will be 90 °F on average in the month of July. The temperature in St Louis is typically hotter than in Chicago. If you're traveling when the temperature is at its warmest, push to plan early, as flight price and availability will have an impact on your travels. For the best results, search for flights well in advance or after peak season.

How long is the flight from Chicago to St Louis?

American Airlines, Linear Air Taxi, and Delta can get you from Chicago to St Louis in just under 1h 18m. Your travel time can differ by up to 2h 49m. The distance from Chicago to St Louis is about 259 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

Our cheapest airline available from Chicago to St Louis is Frontier. Our recent data shows that you can find tickets from as low as $124 on this airline. Additional options worth looking into are American Airlines and Delta, starting at $134 and $146 round-trip. Users have found that Frontier is 46% cheaper than the other options available to this destination.

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

For one-way options, check prices for Frontier. According to our data, you can fly for as low as $40. Users have also found prices from $69 and $71 on Frontier and United Airlines, respectively.

Alternative routes for Chicago to St Louis

Destination information for St Louis

Things to know before you go. Useful info for your trip from Chicago to St Louis
Flight duration
1h 28m
Average temperature for December in St Louis
46.4 °F
Avg rainfall for December in St Louis
2.5 ″

Airports servicing Chicago

Chicago Midway (MDW)
Rockford (RFD)

Airports servicing St. Louis

Top 5 airlines from Chicago to St Louis

The chart below displays the airlines Cheapflights users traveling from Chicago to St Louis choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.

Airline Cheapest Average Flexibility On-time COVID-19 safety
Cape Air
$78 $154 No cancel fee 63%

We couldn't confirm the COVID-19 safety measures taken by Cape Air. Please check directly on their website for additional information.

American Airlines
$145 $329 No cancel fee 71%
United Airlines
$145 $371 No cancel fee 69%
Delta
$200 $413 No cancel fee N/A
Linear Air Taxi
$3,825 $5,335 No cancel fee N/A

We couldn't confirm the COVID-19 safety measures taken by Linear Air Taxi. Please check directly on their website for additional information.

Hourly flight availability from Chicago to St Louis

Afternoon Noon to 6 PM 59% of CHI to STL departures
Morning 6 AM to noon 28% of CHI to STL departures
Evening 6 PM to midnight 10% of CHI to STL departures
Early morning Midnight to 6 AM 3% of CHI to STL departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Chicago to St Louis
Sunday
4 daily flights
Monday
8 daily flights
Tuesday
24 daily flights
Wednesday
8 daily flights
Thursday
5 daily flights
Friday
7 daily flights
Saturday
6 daily flights
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