Cheapest one-way flights from Kansas City to St. Louis in September from 33€

AirHint found the following cheapest one-way flights from Kansas City (MCI) to St. Louis (STL) in September 2025 (see full year).

One-Way flights

13 Sep Southwest Airlines direct
17 Sep Southwest Airlines direct
14 Sep Frontier Airlines
14 Sep Southwest Airlines direct

Also check the deals for return flights from Kansas City to St. Louis in September.

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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