Cheap flights from St. Louis to Chicago

Flights overview

Useful information for finding cheap flights from St. Louis to Chicago and booking your next trip
Cheapest round-trip flights $195
Southwest Nonstop 2 hr Thu, Aug 6 — Mon, Aug 10
The cheapest round-trip flight from St. Louis to Chicago is currently $195
Cheapest one-way flight $69
Southwest Nonstop 2 hr Wed, Aug 5
The cheapest one-way flight from St. Louis to Chicago is currently $69
Last-minute weekend getaway $370
Frontier 1 stop 25 hr Fri, Jun 5 — Sun, Jun 7
The cheapest last-minute weekend getaway from St. Louis to Chicago is currently $370
Cheapest business class flights $395
United Nonstop 2 hr Thu, Aug 6 — Mon, Aug 10
The cheapest business class round-trip flight from St. Louis to Chicago is currently $395
Fastest flight 1 hr 5 min The fastest nonstop flight from St. Louis to Chicago takes 1 hr 5 min
Nonstop flights Every day There are direct flights on this route every day.

When is the cheapest time to fly?

The cheapest month to fly from St. Louis to Chicago is typically August. The most expensive month to fly is typically May.
August
Cheapest
Typical prices: $105–210
May
Most expensive
Typical prices: $190–400

Popular airlines from St. Louis to Chicago

  • Southwest
    Nonstop
    from $195
    Typical price: $165–480
    36 weekly nonstop flights
    STL - MDW Every day
    2357 weekly connecting flights
    STL - MDW, ORD Every day
  • United
    Nonstop
    from $195
    Typical price: $170–510
    69 weekly nonstop flights
    STL - ORD Every day
    273 weekly connecting flights
    STL - ORD Every day
  • American
    Nonstop
    from $195
    Typical price: $170–490
    47 weekly nonstop flights
    STL - ORD Every day
    475 weekly connecting flights
    STL - ORD Every day
  • Delta
    from $247
    Typical price: $210–550
    539 weekly connecting flights
    STL - MDW, ORD Every day
  • Frontier
    from $264
    Typical price: $175–440
    37 weekly connecting flights
    STL - MDW, ORD Every day
  • Alaska
    from $662
    Typical price: $465–1,050
    21 weekly connecting flights
    STL - ORD Every day

Popular airports near St. Louis

  • St. Louis Lambert International Airport (STL)
    St. Louis United States 21 min 12 mi
  • General Wayne A. Downing Peoria International Airport (PIA)
    Peoria United States 2 hr 35 min 143 mi
  • Columbia Regional Airport (COU)
    Columbia United States 2 hr 7 min 109 mi
  • MidAmerica St. Louis Airport (BLV)
    Belleville United States 34 min 20 mi

Popular airports near Chicago

  • Chicago O'Hare International Airport (ORD)
    Chicago United States 26 min 16 mi
  • Chicago Midway International Airport (MDW)
    Chicago United States 25 min 9 mi
  • Milwaukee Mitchell International Airport (MKE)
    Milwaukee United States 1 hr 23 min 75 mi
  • Indianapolis International Airport (IND)
    Indianapolis United States 2 hr 58 min 165 mi

Frequently asked questions about flying from St. Louis to Chicago

The cheapest flights from St. Louis to Chicago are usually in August. Typical ticket prices in August range from $105 to $210.
The cheapest round-trip flight from St. Louis to Chicago recently found on Google Flights was with Southwest from $195. The cheapest one-way flight was with Southwest from $69.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Southwest flight from St. Louis to Chicago is $195, flying from Aug 6 to Aug 10.
  • The cheapest United flight from St. Louis to Chicago is $195, flying from Aug 6 to Aug 10.
  • The cheapest American flight from St. Louis to Chicago is $195, flying from Aug 20 to Aug 24.
  • The cheapest Delta flight from St. Louis to Chicago is $247, flying from Aug 13 to Aug 17.
  • The cheapest Frontier flight from St. Louis to Chicago is $264, flying from Jul 11 to Jul 12.
  • The cheapest Alaska flight from St. Louis to Chicago is $662, flying from Aug 7 to Aug 10.
The cheapest round-trip flight from St. Louis to Chicago starts at $195 from Thu, Aug 6 to Mon, Aug 10. The cheapest one-way flight starts at $69 and departs on Wed, Aug 5.
1 hr 5 min is the shortest flight time from St. Louis to Chicago.
Chicago's peak season is Jun–Aug. Popular events throughout year include St. Patrick's Day, when the river is tinted green (Mar 17); the Pride Parade (Jun); the Taste of Chicago culinary festival (Jul) and the Jazz Festival (Sep). During the holiday season (Nov–Dec), the Magnificent Mile Lights Festival and Christkindlmarket, a German Christmas market in Daley Plaza, draw crowds to the city.
It's easy to use Google Flights to find the cheapest days to fly from St. Louis to Chicago.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.
What counts as the best airline for your flights from St. Louis to Chicago really depends on your individual needs. You may have a favorite carrier or a loyalty program you like, but price, convenience, and airports served also come into play. Flexibility and booking terms – Can you change flights if you want to stay longer or get a refund if you have to postpone your trip? – are also factors that help determine which airline is best to fly from St. Louis to Chicago.

In terms of nonstop flights, United is the most popular. United offers 69 nonstop flights and 273 connecting flights per week. United flies from St. Louis Lambert International Airport (STL) to Chicago O'Hare International Airport (ORD) .

In terms of flights, Southwest is the most popular. Southwest offers 36 nonstop flights and 2,357 connecting flights per week. Southwest flies from St. Louis Lambert International Airport (STL) to Chicago Midway International Airport (MDW) , Chicago O'Hare International Airport (ORD) .

Other popular airlines flying from St. Louis to Chicago are:
  • American offers 47 nonstop flights and 475 connecting flights per week. American flies from St. Louis Lambert International Airport (STL) to Chicago O'Hare International Airport (ORD) .
  • Delta offers 539 connecting flights per week. Delta flies from St. Louis Lambert International Airport (STL) to Chicago Midway International Airport (MDW) , Chicago O'Hare International Airport (ORD) .
  • Frontier offers 37 connecting flights per week. Frontier flies from St. Louis Lambert International Airport (STL) to Chicago Midway International Airport (MDW) , Chicago O'Hare International Airport (ORD) .
  • Alaska offers 21 connecting flights per week. Alaska flies from St. Louis Lambert International Airport (STL) to Chicago O'Hare International Airport (ORD) .
The number of connecting flights refers to distinct flights with at least one stop between St. Louis and Chicago.
The cheapest round-trip flight from St. Louis to Chicago recently found on Google Flights was with Southwest from $195. The cheapest one-way flight was with Southwest from $69.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Southwest flight from St. Louis to Chicago is $195, flying from Aug 6 to Aug 10.
  • The cheapest United flight from St. Louis to Chicago is $195, flying from Aug 6 to Aug 10.
  • The cheapest American flight from St. Louis to Chicago is $195, flying from Aug 20 to Aug 24.
  • The cheapest Delta flight from St. Louis to Chicago is $247, flying from Aug 13 to Aug 17.
  • The cheapest Frontier flight from St. Louis to Chicago is $264, flying from Jul 11 to Jul 12.
  • The cheapest Alaska flight from St. Louis to Chicago is $662, flying from Aug 7 to Aug 10.
Southwest, United and American fly direct from St. Louis to Chicago.
  • There are 36 Southwest direct flights from St. Louis to Chicago per week. Flights are available every day.
  • There are 69 United direct flights from St. Louis to Chicago per week. Flights are available every day.
  • There are 47 American direct flights from St. Louis to Chicago per week. Flights are available every day.
Use the Stops filter while searching for flights, to see only nonstop options in your results.
The cheapest last-minute deal between St. Louis and Chicago at price $370 is offered by Frontier from Fri, Jun 5 to Sun, Jun 7.
Southwest, United and American fly direct from St. Louis to Chicago.
  • There are 36 Southwest direct flights from St. Louis to Chicago per week. Flights are available every day.
  • There are 69 United direct flights from St. Louis to Chicago per week. Flights are available every day.
  • There are 47 American direct flights from St. Louis to Chicago per week. Flights are available every day.
Use the Stops filter while searching for flights, to see only nonstop options in your results.
There are direct flights from St. Louis to Chicago on a daily basis.
The cheapest direct (nonstop) round-trip flights between St. Louis and Chicago start at $195 from Thu, Aug 6 to Mon, Aug 10 with Southwest.
It's easy to find nonstop flights with Google Flights! Once you've searched for flights from St. Louis to Chicago, just select the nonstop flights only option in the 'Stops’ filter in the search form and view all available direct flights and their prices.
The cheapest business class round-trip flights between St. Louis and Chicago start at $395 from Thu, Aug 6 to Mon, Aug 10 with United.
The cheapest economy class round-trip flights between St. Louis and Chicago start at $195 from Thu, Aug 6 to Mon, Aug 10.
To book business class trips from St. Louis to Chicago, look for the default Economy selection at the top, and change it to your desired cabin class such as Premium Economy, Business Class, or First Class. You can then select your departure and arrival dates, consider available options, and book your business travel.

You can also adjust the trip type to view one-way fares.
The best last-minute getaway deal for the next weekend between St. Louis and Chicago starts at $370 from Fri, Jun 5 to Sun, Jun 7 with Frontier.
The cheapest last-minute deal between St. Louis and Chicago at price $370 is offered by Frontier from Fri, Jun 5 to Sun, Jun 7.
To find last-minute flight deals from St. Louis to Chicago, start by entering the city names, select the desired departure and return dates, and hit the Search button to view flight options.

You can check for last-minute flights for the same day or adjust the trip type to see one-way fares.

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