Route Price Intelligence
Cheap Flights From St. Louis to Chicago
Live pricing benchmarks, monthly patterns, and historical lows for this route.
American is running St. Louis to Chicago nonstop for $117, 56% below the usual $269 roundtrip fare on this route. Seats are open across multiple dates this fall, and at nearly half the normal price it is an easy add for deep dish, the lakefront, or a quick weekend escape.
✓ 11 date combinations found at this price
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Best Time to Fly from St. Louis to Chicago
The cheapest time to fly from St. Louis to Chicago is typically October, when fares average around $256. The most expensive month tends to be March at around $378. For the best deals, consider flying in October, December, January.
Typical Price by Travel Month
Median round-trip fare for each month, with the typical price range, from our ongoing tracking of this route