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

Return flights

31 Dec - 04 Jan	Frontier Airlines
30 Dec - 04 Jan	Frontier Airlines
29 Dec - 04 Jan	Frontier Airlines
29 Dec - 31 Dec	Frontier Airlines
28 Dec - 03 Jan	Frontier Airlines
30 Dec - 01 Jan	Frontier Airlines
28 Dec - 05 Jan	Spirit Airlines
28 Dec - 04 Jan	Spirit Airlines
29 Dec - 04 Jan	American Airlines	direct
28 Dec - 03 Jan	American Airlines	direct
28 Dec - 05 Jan	American Airlines	direct
29 Dec - 31 Dec	American Airlines	direct

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

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 December from $357

Return flights