Cheap Flights from St Louis to Chicago

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Flight deals from St Louis Airport to Chicago

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Chicago? If you want to travel next month, return fares start from $203. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from St Louis to Chicago

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Chicago flights are currently cheapest in May.

Direct flights from St Louis to Chicago

St Louis to Chicago: Flight information

The things to know before you go.
Cheapest flight found$101
Cheapest month to flyApril
Average flight time1 hr, 19 mins
Most popular airlineAmerican Airlines
Average flights per week846

Finding cheap flights from St Louis to Chicago: Frequently asked questions

There are 4 airports in Chicago: Chicago Midway, Chicago O'Hare International, Chicago Dupage County, and Chicago Rockford.
The best price we found for a return flight from St Louis to Chicago is $203. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 19 minutes is the average flight time from St Louis to Chicago.
American Airlines, United and Alaska Airlines fly direct from St Louis to Chicago.
As of April 2026, there are 846 flights per week flying from St Louis to Chicago.
The cheapest month to fly from St Louis to Chicago is usually May.
If you're flying from St Louis Airport, the cheapest airport near Chicago is Chicago Midway – which is 14.5 km away from the centre of Chicago. We've found flights into this airport from $203.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Chicago on Wednesday, 27 May 2026.
Yes – the average flight time is 1 hour and 19 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Chicago but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Chicago is around 40 days in advance, so don’t leave your flight to the last minute.
In April, the average temperature is usually around 8°C. July is typically the warmest month in Chicago, when it usually averages around 26°C. You can expect the least rain in January. The coldest month is January, with temperatures averaging -8°C. The rainiest month is August.
Currently, Southwest Airlines offers the cheapest flight tickets to Chicago.

Travelling from St Louis Lambert International Airport (STL) to Chicago: what you need to know

  • Jump on a direct flight from St Louis Lambert International Airport to Chicago and you'll be travelling for an average of 1 hour 25 minutes.

  • Chicago and St Louis (where St Louis Lambert International Airport is located) share the UTC-6 timezone. This means you won't have to adjust your watch after you land.

  • With 92 flights a week between the two airports, St Louis Lambert International Airport (STL) to Chicago O'Hare International Airport (ORD) is the most popular route. American Airlines operates the earliest flight at 05:00. If you'd like to make the most of your day before flying, the last departure from STL to ORD is with American Airlines at 19:59.

  • To avoid rushing for your STL to Chicago flight, leave enough time for things like baggage drop and finding your gate. Arriving two hours before international departures and one hour before domestic flights is the standard rule.

  • You'll likely experience longer queues in popular months like July. Arriving up to four hours in advance for an international flight and two hours for domestic departures is a good idea.

  • Start your journey at STL and fly straight to Chicago O'Hare International Airport (ORD). That's where you can expect to touch down when searching for St Louis Lambert International Airport to Chicago tickets.

  • Top airlines that operate direct flights from St Louis Lambert International Airport to Chicago include:

  • STL is about 16 kilometres from central St Louis. If you're catching a taxi, ride-sharing or driving from the centre, it'll take you 25 minutes or so to get there, depending on traffic conditions. If you're planning to take public transport, expect the travel time to be around 30 minutes.

  • Want a stress-free start to your travels? Stay near STL. Whether you're catching an early flight from St Louis Lambert International Airport to Chicago or don't want departure day to feel hectic, these hotels are just the thing:

  • Of the flights that depart from St Louis Lambert International Airport, 76% touch down on time at their destination.

  • The address for STL is 10701 Lambert International Blvd..

How to find the cheapest flights from St Louis Lambert International Airport (STL) to Chicago

  • $101 is the lowest price we've seen for a one-way St Louis Lambert International Airport to Chicago flight. A return ticket right now is $203. Depending on how early you book and the availability, these fares may change.

  • To secure cheap flights from STL to Chicago, book your trip three months ahead of your planned departure.

  • August is the best month for picking up an incredible deal on St Louis Lambert International Airport to Chicago tickets. If you're looking to travel at a different time of year, the 'Whole month' tool will show you the lowest prices for each month.

  • Cut down on the time spent looking for cheap flights from STL to Chicago by setting up a Price Alert. You'll receive an email or notification through the app when a new low fare is offered.

  • Save on your flight from St Louis Lambert International Airport to Chicago with the help of our filters. Choose your preferred duration, number of stops and airlines, then sort the results by 'Cheapest' to see the best deals.

Airports in Chicago

Chicago O'Hare International Airport (ORD)

  • Chicago O'Hare International Airport (ORD) is around 27 kilometres from central Chicago. If you're opting for a ride-share or a taxi, the drive takes roughly 30 minutes.

  • Getting to the centre on public transport will take you around 45 minutes.

  • Book a hotel near ORD if you have a late flight from St Louis Lambert International Airport to Chicago. Choose one of these options and make your arrival easier:

  • Lock in the best possible rate by booking your vehicle from Chicago O'Hare International Airport about four weeks in advance of your flight from STL to Chicago.

  • The address for ORD is 10000 West O'Hare.

Chicago Midway International Airport (MDW)

  • After your flight from St Louis Lambert International Airport to Chicago has landed, you can make your way to the city centre in about 25 minutes by car. Central Chicago is roughly 16 kilometres from Chicago Midway International Airport (MDW).

  • You can expect the trip to take about 30 minutes on public transport.

  • Place the 'Do not disturb' sign on your door and relax at a hotel close to MDW. Here are a few options where you can tuck yourself in after your STL to Chicago flight:

  • Call dibs on the best options. Booking your ride from MDW four weeks in advance often means better deals and a greater range of vehicles.

  • The address for Chicago Midway International Airport is 5700 South Cicero.

Chicago Rockford International Airport (RFD)

  • Make your way to the city centre after your flight from St Louis Lambert International Airport to Chicago has touched down. Central Chicago is about 145 kilometres from Chicago Rockford International Airport (RFD) and takes roughly 1 hour 40 minutes to get to by car.

  • The journey will take you around 2 hours by public transport.

  • Enjoy a restful, unhurried start to your break by choosing a hotel near RFD after your STL to Chicago flight. Unwind after a day of travel or simply take a moment to settle into a new destination at:

  • If you prefer a specific make or model, booking early increases your chances of finding what you want. Secure your ride from RFD at least a few weeks ahead of your flight from St Louis Lambert International Airport to Chicago.

  • Chicago Rockford International Airport's official address is 2 Airport Cir.

Best time to go to Chicago

  • January is the quietest month for flights from St Louis Lambert International Airport to Chicago, while July is the most popular. Find the best time to go to Chicago based on whether you like a laid-back vibe or a lively atmosphere.

  • Before locking in your St Louis Lambert International Airport to Chicago plane ticket, think about the kind of weather you prefer. July is the warmest month in Chicago, with temperatures ranging from 16ºC to 28ºC.

  • January sees average temperatures of between -12ºC and 3ºC. Search for a cheap ticket from STL to Chicago around that time if you like cooler conditions.

More about Chicago

Explore more of the United States

  • Columbus is just one of the many cities in the United States waiting to be discovered once you've seen the sights of Chicago. Around 451 kilometres away to the southeast, top sights here include Franklin Park Conservatory and Botanical Gardens, Whetstone Park / Park of Roses and Ohio Theatre.

  • Around 257 kilometres southeast of Chicago, Indianapolis is another essential stop in the United States. Start your sightseeing at Lucas Oil Stadium, Eiteljorg Museum and The Children's Museum of Indianapolis.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.