Chicago to St Louis in August 2026

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

Lowest this month $148

Highest this month $159

Sample fare $76

Airports MDW–STL

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August 2026 price calendar

From $148 · up to $159

Mon

Tue

Wed

Thu

Fri

Sat

Sun

26 $156 27 $152 28 $148 29 $159 30 $159 31 $158

St Louis STL

$148

Aug 28, 8:40am · 1h 32m · 0 stops

ORD → STL · United Airlines

St Louis STL

$156

Aug 26, 11:00pm · 1h 14m · 0 stops

ORD → STL · American Airlines

This page is only August 2026 on the 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 Chicago to St Louis in August 2026.