Cheapest return flights from St. Louis to Chicago in August from 141€

AirHint found the following cheapest return flights from St. Louis (STL) to Chicago (MDW) in August 2025 (see full year).

Return flights

22 Aug - 23 Aug Frontier Airlines
21 Aug - 23 Aug Frontier Airlines
21 Aug - 22 Aug Frontier Airlines
28 Aug - 04 Sep Southwest Airlines direct
30 Aug - 03 Sep Frontier Airlines
17 Aug - 18 Aug Frontier Airlines
29 Aug - 30 Aug Frontier Airlines
16 Aug - 18 Aug Frontier Airlines
29 Aug - 30 Aug Southwest Airlines direct
29 Aug - 31 Aug Southwest Airlines direct
29 Aug - 01 Sep Southwest Airlines direct
21 Aug - 28 Aug Southwest Airlines direct
22 Aug - 23 Aug Southwest Airlines direct

Also check the deals for one-way flights from St. Louis to Chicago in August.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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