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

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The best prices from St Louis to Chicago are usually found in July or August, booked 54 days in advance, depart on a Monday or Wednesday and return on a Saturday

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

All the information you need to plan the best STL to CHI flight in 2021: compare St Louis to Chicago flight prices with the expected peak season, weather and rainfall in Chicago.
STL - CHI
Price
$156 - $284
CHI
Temperature
33.8 - 84.2 °F
CHI
Rainfall
0.7 - 4.3 inches

Popular in

December

High demand for flights, 21% potential price rise

Cheapest in

July

Best time to find cheap flights, 31% potential price drop

Round-trip from

$156

From St Louis to Chicago

One-way from

$76

One-way flight from St Louis to Chicago

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 St Louis to Chicago?

Flying to your destination on a Saturday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to Chicago. Check prices with Cheapflights to find a great deal for your trip.

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

Travelers have found it’s best to book a flight 20 days in advance to save up to 10% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 20 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from St Louis to Chicago 1-2 weeks in advance for as low as $137, or $157 for flights within the next 24 hours.

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

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, April can be a great choice for travel to Chicago. Flights to Chicago from St Louis in April are about $135 on average during April, but can be found for as low as $33.

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

It’s typically best to fly out from St Louis to Chicago in the morning. Doing so could potentially save you 11% on the flight price compared to flying in the afternoon, which is usually more expensive.

Cheap flights from St Louis to Chicago in May, June 2021

The best prices found for STL to CHI flights for May, June
10 May - 12 May
$141pp
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
21 May - 23 May
$148pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Air Choice One
 
1 STOP
STL
Lambert-St Louis
21 May - 23 May
$151pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Air Choice One
 
1 STOP
STL
Lambert-St Louis

St Louis to Chicago 2021 flight deals

Cheap flights to Chicago from St Louis found for this year
21 Jul - 4 Aug
$123pp
STL
Lambert-St Louis
Frontier
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
Non-Stop
STL
Lambert-St Louis
9 Sep - 9 Sep
$133pp
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
American Airlines
Non-Stop
STL
Lambert-St Louis
9 Sep - 9 Sep
$135pp
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
American Airlines
 
1 STOP
STL
Lambert-St Louis

Non-stop flights to Chicago from St Louis

Save time with St Louis to Chicago direct flight deals
21 Jul - 4 Aug
$123pp
STL
Lambert-St Louis
Frontier
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
Non-Stop
STL
Lambert-St Louis
9 Sep - 9 Sep
$133pp
STL
Lambert-St Louis
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
American Airlines
Non-Stop
STL
Lambert-St Louis
7 Jul - 10 Jul
$138pp
STL
Lambert-St Louis
Multiple Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
United Airlines
Non-Stop
STL
Lambert-St Louis

Last minute flights from St Louis to Chicago

Late deals on round-trip flights to Chicago from St Louis, departing today and this week
10 May - 12 May
$141pp
STL
Lambert-St Louis
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
10 May - 17 May
$153pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Air Choice One
 
1 STOP
STL
Lambert-St Louis
12 May - 15 May
$155pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis

One-way flights to Chicago from St Louis

The cheapest one-way flights from St Louis to Chicago
1:24 am - 8:19 am
Major Airline
1 Stop
6h 55m
STL - ORD
Major Airline
$76
StudentUniverse
6:25 pm - 7:43 pm
Frontier
1 Stop
25h 18m
STL - ORD
Frontier
$83
Kiwi.com
7:45 am - 9:03 am
United Airlines
Nonstop
1h 18m
STL - ORD
United Airlines
$87
United

Related info for your journey

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

Flight FAQs

From St Louis to Chicago

Are flight prices decreasing from St Louis to Chicago 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 St Louis and Chicago 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 Lambert-St Louis to Chicago to control the spread of COVID-19?

Delta is one of the many airlines that have implemented additional safety measures to control the spread of COVID-19. New policies for travelers booking flights from Lambert-St Louis to Chicago 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 Lambert-St Louis to Chicago have flexible cancellations due to COVID-19?

Some of the carriers operating flights from Lambert-St Louis to Chicago that may be offering flexible cancellation policies are American Airlines, United Airlines, and Cape Air. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

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

If you book a flight to Chicago from St. Louis, you will be flying from 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 18 flights from Lambert-St Louis to Chicago per day from 8 different airlines.

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

Yes, there are multiple flights from St Louis to Chicago for under $200. The cheapest flight booked recently is on Frontier for just $123, but on average you can expect to pay $145.

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

Cheapflights has at least 20 direct flights from St Louis to Chicago under $200. A good price for a nonstop flight from St Louis to Chicago is less than $165.

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

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

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

You can find nonstop flights on the following days: Sunday, Monday, Friday, Saturday.

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

Travelers can expect 7 flights from Lambert-St Louis to Chicago on average per day.
Early Morning (Midnight to 6am) - 14% of flight departures
Morning (6am - Noon) - 57% of flight departures
Afternoon (Noon - 6pm) - 14% of flight departures
Evening (6pm - Midnight) - 14% of flight departures

Is St Louis weather warmer or cooler than Chicago?

Temperatures around the 90 °F's can be experienced in July. The weather in Chicago is colder than in St Louis. Plan for potential changes in flight availability as peak weather approaches in this location.

How long is the flight from St Louis to Chicago?

Departing from St Louis to Chicago will take you 1h 18m. The distance between St Louis and Chicago is about 252 mi. Generally, flights for this route are nonstop.

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

Cheapflights users have booked flights from St Louis to Chicago round-trip from $123. Other airlines that can offer you cheap pricing are American Airlines, from $133, and United Airlines, from $152. Frontier is 45% cheaper than the average price of flights available within the next 90 days to this destination.

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

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $55. United Airlines flights start at $67 while deals on Spirit Airlines start at $75 one-way.

Alternative routes for St Louis to Chicago

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

Destination information for Chicago

Things to know before you go - useful duration and weather info for your trip from St Louis to Chicago.
Flight duration
1h 23m
Average temperature for May in Chicago
71.6 °F
Avg rainfall for May in Chicago
4.3 ″

Airports servicing St. Louis

Airports servicing Chicago

Chicago Midway (MDW)
Rockford (RFD)

Top 5 airlines flying from St Louis to Chicago

The chart below displays the airlines Cheapflights users traveling from St Louis to Chicago 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
$73 $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
$131 $296 No cancel fee 69%
American Airlines
$147 $310 No cancel fee 71%
Delta
$158 $402 No cancel fee N/A
Linear Air Taxi
$2,484 $5,165 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 St Louis to Chicago

See what time of day planes typically take off from St Louis towards Chicago.
Morning 6 AM to noon 43% of STL to CHI departures
Early morning Midnight to 6 AM 32% of STL to CHI departures
Afternoon Noon to 6 PM 24% of STL to CHI departures
Evening 6 PM to midnight 1% of STL to CHI departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from St Louis to Chicago
See how many times per day planes take to the skies headed from St Louis to Chicago.
Sunday
13 daily flights
Monday
24 daily flights
Tuesday
26 daily flights
Wednesday
31 daily flights
Thursday
11 daily flights
Friday
18 daily flights
Saturday
8 daily flights
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