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 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)

All the information you need to plan the best CHI to STL flight in 2021: compare Chicago to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.
CHI - STL
Price
$128 - $284
STL
Temperature
32 - 80.6 °F
STL
Precipitation
2.2 - 4.7 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 (CHI) to Lambert-St Louis

One-way from

$73

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 month to fly from Chicago to St. Louis?

July is one of the best times of the year to fly to St. Louis from Chicago. Prices for July average $233 per person but you can even find prices for as low as $106. The most expensive prices can be found in the month of March. Opting for a July flight can save you 21% on your journey compared to booking in July

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

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

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 48 days before your planned departure. Booking around this time can save you about 10% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $269 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $277.

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.

Cheap flights from Chicago to St. Louis in October, November 2021

The best prices found for CHI to STL flights for October, November
26 Oct - 31 Oct
$121pp
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
27 Oct - 29 Oct
$130pp
ORD
Chicago O'Hare Intl
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
30 Oct - 31 Oct
$131pp
ORD
Chicago O'Hare Intl
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Spirit Airlines
 
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
26 Oct - 31 Oct
$121pp
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
27 Oct - 29 Oct
$130pp
ORD
Chicago O'Hare Intl
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
30 Oct - 31 Oct
$131pp
ORD
Chicago O'Hare Intl
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Spirit Airlines
 
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
7 Nov - 8 Nov
$147pp
ORD
Chicago O'Hare Intl
Major Airline
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Major Airline
Non-Stop
ORD
Chicago O'Hare Intl
11 Nov - 11 Nov
$150pp
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
3 Feb - 7 Feb
$155pp
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
26 Oct - 31 Oct
$121pp
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
27 Oct - 29 Oct
$130pp
ORD
Chicago O'Hare Intl
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
26 Oct - 27 Oct
$133pp
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 Lambert-St Louis from Chicago

The cheapest one-way flights from Chicago to St. Louis
8:00 am - 12:10 pm
Air Choice One
1 Stop
4h 10m
ORD - STL
Air Choice One
$73
FlyFar
6:18 am - 4:09 am
Frontier
1 Stop
21h 51m
ORD - STL
Frontier
$74
Kiwi.com
3:55 am - 5:22 am
United Airlines
Nonstop
1h 27m
ORD - STL
United Airlines
$78
United

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 55 flights from Chicago to Lambert-St Louis per day from 9 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 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 American Airlines for just $121, but on average you can expect to pay $140.

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 $190.

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: Wednesday, Thursday, Saturday.

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

Travelers can expect 6 flights from Chicago to St. Louis on average per day.
Morning (6am - Noon) - 67% of flight departures
Afternoon (Noon - 6pm) - 33% of flight departures

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

Airlines like American Airlines, Spirit Airlines, and Air Choice One fly from Chicago to St. Louis in about 4h 10m. The time it takes to get you to your destination can typically vary by up to 21h 55m. 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 $121, was found to be the cheapest airline from Chicago to St. Louis.Alternate airlines to your destination round-trip include Spirit Airlines and Air Choice One. These flights start at 48% 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 $49 on Spirit Airlines. Other airlines that offer cheap prices include Air Choice One from $69 and Frontier from $74 one-way.

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.

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 Asiana Airlines (100%), Japan Airlines (90%) or Turkish Airlines (88%) 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 $102. On average you can expect to pay $355. The most popular route, (Chicago O'Hare Intl - Lambert-St Louis), can usually be booked for $97.

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 must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to 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 must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to 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 October in St. Louis
71.6 °F
Avg rainfall for October in St. Louis
2.8 ″

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
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.

United Airlines
$145 $371 No cancel fee 69%
American Airlines
$145 $329 No cancel fee 71%
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

See what time of day planes typically take off from Chicago towards St. Louis.
Afternoon Noon to 6 PM 43% of CHI to STL departures
Morning 6 AM to noon 31% of CHI to STL departures
Evening 6 PM to midnight 24% of CHI to STL departures
Early morning Midnight to 6 AM 2% 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
64 daily flights
Monday
61 daily flights
Tuesday
44 daily flights
Wednesday
54 daily flights
Thursday
49 daily flights
Friday
62 daily flights
Saturday
55 daily flights
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