Cheapest return flights from St. Louis to Dallas-Fort Worth in September from $68

AirHint found the following cheapest return flights from St. Louis (STL) to Dallas-Fort Worth (DFW) in September 2025 (see full year).

Return flights

07 Sep - 14 Sep Frontier Airlines direct
18 Sep - 21 Sep Frontier Airlines direct
07 Sep - 11 Sep Frontier Airlines direct
12 Sep - 14 Sep Frontier Airlines
07 Sep - 09 Sep Frontier Airlines
25 Sep - 29 Sep Frontier Airlines
07 Sep - 07 Sep Frontier Airlines
04 Sep - 04 Sep Frontier Airlines
16 Sep - 17 Sep American Airlines direct
20 Sep - 21 Sep Frontier Airlines

Also check the deals for one-way flights from St. Louis to Dallas-Fort Worth 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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