Price observed over the last 3 months for a round trip.
Compare all flight tickets and find cheap flights from Chicago to St Louis
The cheapest flights right now
Chicago – St Louis
Outbound – Oct 15, 2026
direct
1h 10m Return – Oct 19, 2026
direct
1h 5m $126
today
Chicago – St Louis
Outbound – Oct 15, 2026
direct
1h 10m Return – Oct 20, 2026
direct
1h 5m $124
2 days ago
* Prices are in USD per passenger, including taxes, for a round trip. Prices are based on searches carried out within the last 72 hours. Please note that availability and ticket prices are subject to change and should not be considered as the final price quoted.
Cheapest flight tickets
$116
Average price of a round trip
$154
Average flight ticket price recorded over the last 3 months for a round trip.
Flight duration
1h19
A flight from Chicago to St Louis takes on average 1h19.
Best time
January
According to user searches, the ideal month to go to St Louis is January.
Tips for finding a cheap flight from Chicago to St Louis
Check out our tips for booking your flight to St Louis (USA) from Chicago (USA) at the cheapest possible price.
Usually, the cheapest month to pick up a ticket on this route is August, with an average flight ticket price of $146 (calculation over the last two years). The most touristic season corresponds to the months of September, February and August.
For the cheapest flights, it is advisable to buy your ticket at least 21 days before the departure date.
The airline offering the cheapest flight tickets is American Airlines. A ticket from the airline American Airlines to St Louis costs on average $176.
The airlines that offer the most flights are American Airlines, United Airlines and Southwest Airlines.
Price of flight tickets from Chicago to St Louis
Here is some information and tips to know before booking your flight:
- Flight ticket prices range from $116 to $279
- The average price of a flight ticket is about $154
- Prices are lowest for stays in the month of August
- The month in which booking a ticket is cheaper is: September
info departure city :
Chicago, USA
airports :
Chicago-Merrill C. Meigs Field Airport (CGX)
Chicago FSS (CHI)
Chicago-Midway International Airport (MDW)
Chicago-O'Hare International Airport (ORD)
local time :
Chicago is a city in the country USA, the time zone is [[timezone]]. In Chicago, it is currently {fromLocalTime}, the temperature is on average 16°C, with a minimum of 14°C and a maximum of 18°C.
The city of Chicago (CHI) has 4 airport(s): Chicago-Merrill C. Meigs Field, Chicago FSS, Chicago-Midway and Chicago-O'Hare
destination info :
St Louis, USA
airports :
Lambert-St. Louis International Airport (STL)
St. Louis Downtown Airport (CPS)
Spirit of St. Louis Airport (SUS)
local time :
St Louis is in the country USA, the time zone is [[timezone]]. In St Louis, it is currently {toLocalTime}, the temperature is on average 20°C, with a minimum of 18°C and a maximum of 21°C.
The city of St Louis has 3 airport(s): Lambert-St. Louis, St. Louis Downtown and Spirit of St. Louis
Useful info about St Louis
What is the least touristic period to go to St Louis?
If you want to visit St Louis during the least touristic period, choose the month of January.
What is the most popular time to travel to St Louis?
In St Louis, the most popular month is September. It is during this period that the prices offered by airlines are also the highest.
When should I book my flight from Chicago to St Louis?
According to our data, it is recommended to book your flight 21 days before your departure. If you book your flight ticket 4 weeks before your departure, you may find a price below average. The cheapest day to book a flight from Chicago to St Louis is Sunday.
What are the arrival and destination airports when traveling between Chicago and St Louis?
When you leave, you can leave from Chicago-Midway or Chicago-O'Hare, and you will arrive at Lambert-St. Louis.
How to reach Chicago airport from the city centre?
The airport Chicago-Merrill C. Meigs Field is located 4 km, Chicago FSS is located 29 km, Chicago-Midway is located 12 km or Chicago-O'Hare is located 29 km from the city centre. You can access it by using public transportation, taking a taxi, or renting a car.
Are there other means of transportation to go from Chicago to St Louis?
Airplane is the only means of transportation listed on Liligo for this journey.
Are there big differences in weather between Chicago and St Louis?
In summer, the average temperature is 25°C in St Louis and 22°C in Chicago. The average rainfall in summer is 135 mm in St Louis and 145 mm in Chicago. In summer, it is warmer in St Louis and it rains less in St Louis. In winter, it is colder in St Louis and it rains more in St Louis.
