Flights Chicago — St Louis is a popular route. The straight-line distance is 422 km. Flight time 1 h 0 min. Time difference +0 h.
From Chicago (CHI) flights depart from 6 airports. To St Louis (STL) — 2 arrival airports.
3 airlines operate on this route: American Airlines, Frontier Airlines, Southwest Airlines. Compare prices, baggage allowance and departure times.
The minimum price for the next 6 months — from 70 $ (09.12.2026). The cheapest dates are highlighted in the calendar above.