ORD (Chicago) to St Louis in August 2026

Dated one-way fares from ORD (Chicago) to St Louis in August 2026. Use the calendar to see which days are cheaper.

Lowest this month $131

Highest this month $159

Sample fare $56

Airports ORD–STL

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August 2026 price calendar

From $131 · up to $159

Mon

Tue

Wed

Thu

Fri

Sat

Sun

26 $131 27 $140 28 $148 29 $159 30 $159 31 $158

St Louis STL

$56

Oct 31, 3:30pm · 1h 29m · 0 stops

ORD → STL · United Airlines

St Louis STL

$82

Sep 11, 7:18pm · 1h 26m · 0 stops

ORD → STL · American Airlines

This page is only August 2026 on the ORD (Chicago) to St Louis route. Open the full route if you want the next months side by side.

Prices move as seats sell. Confirm the live itinerary before you book ORD (Chicago) to St Louis in August 2026.