Route Price Intelligence
Cheap Flights From Chicago to Saint Louis
Live pricing benchmarks, monthly patterns, and historical lows for this route.
Typical Price
$337
Great Deal
Under $276
Typical Range
$276 – $357
Lowest We've Seen
$105
Based on 271 price pointshigh confidence
Monthly Price Guide
Jan
$368
Feb
—
Mar
—
Apr
$545
May
$261
Jun
$281
Jul
$337
Aug
$261
Sep
$276
Oct
$337
Nov
$357
Dec
$397
Cheapest Average Expensive
Best Time to Fly from Chicago to Saint Louis
The cheapest time to fly from Chicago to Saint Louis is typically May, when fares average around $261. The most expensive month tends to be April at around $545. For the best deals, consider flying in May, August, September.
Typical Price by Travel Month
Median round-trip fare for each month, with the typical price range, from our ongoing tracking of this route
Cheapest month: July45,163 fares analyzedTypical low: $315