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

Return flights

28 Aug - 31 Aug	Frontier Airlines	direct
30 Aug - 06 Sep	Frontier Airlines
30 Aug - 31 Aug	Frontier Airlines
28 Aug - 02 Sep	Frontier Airlines
30 Aug - 01 Sep	Frontier Airlines
29 Aug - 31 Aug	Frontier Airlines
29 Aug - 01 Sep	Frontier Airlines
30 Aug - 06 Sep	American Airlines	direct
31 Aug - 01 Sep	Spirit Airlines
28 Aug - 29 Aug	Spirit Airlines
28 Aug - 02 Sep	Southwest Airlines	direct
30 Aug - 31 Aug	Southwest Airlines	direct
29 Aug - 01 Sep	American Airlines	direct
29 Aug - 31 Aug	American Airlines	direct

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

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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Cheapest return flights from St. Louis to Dallas-Fort Worth in August from $188

Return flights