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Cheap Flights from Chicago to St. Louis
CHI → STL • About 1h 15m nonstop • 3 airlines
Adults
+12 years old
Children
2-11 years old
Infants
Under 2 years
Fares shown are the lowest we have recorded recently on this route and are not a live quote. Run a search above for today's availability, or call (800) 399-8818 and an agent will price it with you.
Flights from Chicago (CHI) to St. Louis (STL)
The Chicago to St. Louis route covers roughly 260 miles and takes about 1h 15m nonstop. 3 airlines compete on it — Southwest Airlines, United Airlines, American Airlines — which keeps fares moving and makes it worth comparing carriers rather than defaulting to the one you usually fly. We have seen one-way fares on this route start around $79.
St. Louis is defined by the Gateway Arch, the tallest monument in the United States, standing above the Mississippi as the symbolic doorway to the American West.
Forest Park is larger than Central Park and holds the zoo, art museum, history museum and science center — all of them free.
Airlines flying CHI to STL
- Southwest Airlines
- United Airlines
- American Airlines
Airports on this route
- Departing: Chicago O'Hare International Airport (ORD)
- Departing: Chicago Midway International Airport (MDW)
- Arriving: St. Louis Lambert International Airport (STL)
Chicago is served by 2 airports. Fares between them can differ by $50 to $150 on the same dates, so ask us to price all of them before you book.
Best time to fly to St. Louis
April through June and September through October. Midsummer is hot and humid.
Top things to do in St. Louis
- Gateway Arch
- Forest Park
- St. Louis Zoo
- City Museum
- Missouri Botanical Garden
- Anheuser-Busch Brewery
How to save on Chicago to St. Louis flights
- Shift your departure by one or two days — midweek departures on this route are consistently cheaper than Friday and Sunday.
- Book four to eight weeks ahead. Last-minute fares on CHI to STL routinely run double the advance price.
- Compare all 3 carriers rather than checking one airline's own site.
- Almost every major attraction in Forest Park charges nothing for admission.
- The MetroLink train runs from the airport to downtown in about 35 minutes.
- The City Museum is unlike any other museum anywhere — allow half a day.
About flights from Chicago to St. Louis
Fares on the CHI to STL route move with demand, so flexibility is worth more than timing tricks. Shifting your departure by a day or two, flying midweek instead of Friday or Sunday, and booking four to eight weeks ahead all reduce the fare on this route. Chicago is served by 2 airports, so ask us to price all of them — the difference is often significant. Our agents also hold consolidator and unpublished fares that do not appear in online results.
Southwest Airlines, United Airlines, American Airlines all operate on this route. Southwest Airlines typically offers the most frequencies, with United Airlines and American Airlines providing competing schedules. Availability varies by season and by which Chicago airport you depart from, so it is worth comparing all carriers before booking.
A nonstop flight takes about 1h 15m. Itineraries with a connection typically add two to four hours depending on the layover city and the length of the stop.
The two cities are roughly 260 miles apart by air.
Departures leave from Chicago O'Hare International Airport (ORD), Chicago Midway International Airport (MDW). Arrivals land at St. Louis Lambert International Airport (STL).
April through June and September through October. Midsummer is hot and humid.