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

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The best prices from Chicago to Lambert-St Louis are usually found in October or January, booked 26 days in advance, depart on a Saturday or Wednesday and return on a Thursday

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

All the information you need to plan the best CHI to STL flight in 2022: compare Chicago to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.
CHI - STL
Price
$175 - $319
STL
Temperature
32 - 80.6 °F
STL
Rainfall
2.2 - 4.7 inches

Popular in

April

High demand for flights, 34% potential price rise

Cheapest in

October

Best time to find cheap flights, 17% potential price drop

Round-trip from

$175

From Chicago (CHI) to Lambert-St Louis

One-way from

$120

One-way flight from Chicago (CHI) to Lambert-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 54% on your flight compared to booking on days when demand is much higher.

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

October is one of the best times of the year to fly to St. Louis from Chicago. Prices for October average $211 per person but you can even find prices for as low as $142. The most expensive prices can be found in the month of April. Opting for a October flight can save you 50% on your journey compared to booking in April

How far in advance should I book a flight from Chicago to St. Louis?

To save on the cost of your flight from Chicago to St. Louis, book at least 25 days before your planned departure. Booking around this time can save you about 48% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $227 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $304.

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

Unlike at noon, when flights are generally more expensive, you can save up to 19% on flights from Chicago to St. Louis by exploring options for tickets in the morning.

Cheap flights from Chicago to St. Louis in June, July 2022

The best prices found for CHI to STL flights for June, July
25 Jul - 26 Jul
$245pp
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl
25 Jul - 26 Jul
$247pp
ORD
Chicago O'Hare Intl
Cape Air
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Cape Air
 
1 STOP
ORD
Chicago O'Hare Intl
28 Jun - 29 Jun
$248pp
ORD
Chicago O'Hare Intl
Cape Air
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Cape Air
 
1 STOP
ORD
Chicago O'Hare Intl

Chicago to St. Louis 2022 flight deals

Cheap flights to St. Louis from Chicago found for this year
19 Aug - 20 Aug
$198pp
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
19 Aug - 20 Aug
$205pp
ORD
Chicago O'Hare Intl
American Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
3 Oct - 12 Oct
$207pp
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl

Non-stop flights to St. Louis from Chicago

Save time with Chicago to St. Louis direct flight deals
19 Aug - 20 Aug
$198pp
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
19 Dec - 21 Dec
$219pp
ORD
Chicago O'Hare Intl
Multiple Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
Non-Stop
ORD
Chicago O'Hare Intl
18 Aug - 21 Aug
$229pp
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
6 Jul - 9 Jul
$260pp
ORD
Chicago O'Hare Intl
United Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
Non-Stop
ORD
Chicago O'Hare Intl
6 Jul - 7 Jul
$266pp
ORD
Chicago O'Hare Intl
Multiple Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Cape Air
 
1 STOP
ORD
Chicago O'Hare Intl
3 Jul - 10 Jul
$267pp
ORD
Chicago O'Hare Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl

One-way flights to Lambert-St Louis from Chicago

The cheapest one-way flights from Chicago to St. Louis
12:01 pm - 1:30 pm
United Airlines
Nonstop
1h 29m
ORD - STL
United Airlines
$120
United
3:41 pm - 7:58 am
Spirit Airlines
2 Stops
16h 17m
ORD - STL
Spirit Airlines
$135
Gotogate
1:15 pm - 3:15 am
Multiple Airlines
1 Stop
14h 00m
ORD - STL
Multiple Airlines
$137
Kiwi.com

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Chicago</span> to <span class="emphasized">St. Louis</span> flights.

Flight FAQs

From Chicago to St. Louis

What airport do you fly into for flights to St. Louis from Chicago?

If you book a flight to St. Louis from Chicago, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 53 flights from Chicago to Lambert-St Louis per day from 10 different airlines.

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 Frontier 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 American Airlines for just $198, but on average you can expect to pay $223.

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

Cheapflights has at least 20 direct flights from Chicago to St. Louis under $200. A good price for a nonstop flight from Chicago to St. Louis is less than $273.

Are there last-minute flights available from Chicago to St. Louis for under $300?

There are currently 20+ open flights from Chicago to St. Louis within the next 7 days for less than $300.

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

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

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

Travelers can expect 25 flights from Chicago to St. Louis on average per day.
Morning (6am - Noon) - 20% of flight departures
Afternoon (Noon - 6pm) - 68% of flight departures
Evening (6pm - Midnight) - 12% of flight departures

How long is the flight from Chicago to St. Louis?

Airlines like American Airlines, Delta, and United Airlines fly from Chicago to St. Louis in about 1h 08m. The time it takes to get you to your destination can typically vary by up to 5h 23m. The distance from Chicago to St. Louis is about 259 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

American Airlines, at $198, was found to be the cheapest airline from Chicago to St. Louis.Alternate airlines to your destination round-trip include Delta and United Airlines. These flights start at 6% lower than the current average price 3 months from now.

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

One-way options have recently been found by users for as low as $99 on American Airlines. Other airlines that offer cheap prices include Delta from $108 and United Airlines from $120 one-way.

What are the most reliable airlines from Chicago to St. Louis?

No one likes to see their flight delayed. When booking a flight from Chicago to St. Louis consider choosing GoJet (89%), Envoy Air (88%) or Finnair (87%) as they are the most reliable in getting you off to your destination on time.

What are the cheapest flights from Chicago to St. Louis?

The cheapest flight price from Chicago to St. Louis is $98. On average you can expect to pay $287. The most popular route, (Chicago O'Hare Intl - Lambert-St Louis), can usually be booked for $207.

What are the most popular airlines that fly from Chicago to St. Louis?

Train, Bus and Major Airline are the most popular airlines when flying from Chicago to St. Louis.

COVID Restrictions

View COVID Travel Restrictions for St. Louis, MO

Do I need a COVID test to fly to St. Louis from Chicago?

Information is based on travel restrictions for travel to Lambert-St Louis within the United States

Most visitors from Chicago need to provide a negative COVID-19 test result and/or quarantine to enter Lambert-St Louis.

COVID-19 testing requirements
Visitors from Chicago are not required to present a negative COVID-19 PCR test or antigen result upon entering Lambert-St Louis.

Quarantine requirements
Visitors from Chicago are not required to quarantine after entering Lambert-St Louis.

Do I need a test to fly back to Chicago from St. Louis?

Returning to Chicago from Lambert-St Louis

COVID-19 testing requirements
Visitors from Lambert-St Louis are not required to present a negative COVID-19 PCR test or antigen result upon entering Chicago.

Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Chicago.

Hide COVID Travel Restrictions for St. Louis, MO

Alternative routes for Chicago to St. Louis

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

Destination information for St. Louis

Things to know before you go - useful duration and weather info for your trip from Chicago to St. Louis.
Flight duration from Chicago to STL
1h 22m
Average temperature for June in St. Louis
86.0 °F
Avg rainfall for June in St. Louis
4.1 ″

Airports servicing Chicago

Midway (MDW)
Rockford (RFD)

Airports servicing St. Louis

Top 5 airlines flying from Chicago to Lambert-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
Juneyao Airlines
$12 $22 No cancel fee 66%

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

Frontier
$39 $76 No cancel fee 62%
American Airlines
$107 $272 No cancel fee 71%
United Airlines
$119 $239 No cancel fee 69%
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

See what time of day planes typically take off from Chicago towards St. Louis.
Afternoon Noon to 6 PM 56% of CHI to STL departures
Evening 6 PM to midnight 22% of CHI to STL departures
Morning 6 AM to noon 18% of CHI to STL departures
Early morning Midnight to 6 AM 4% of CHI to STL departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Chicago to St. Louis
See how many times per day planes take to the skies headed from Chicago to St. Louis.
Sunday
53 daily flights
Monday
59 daily flights
Tuesday
55 daily flights
Wednesday
54 daily flights
Thursday
58 daily flights
Friday
57 daily flights
Saturday
38 daily flights
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