AirHint found the following cheapest return flights from Chicago (MDW) to Houston (IAH) in December 2025 (see full year).

Return flights

05 Dec - 07 Dec	Frontier Airlines	direct
07 Dec - 14 Dec	Frontier Airlines	direct
11 Dec - 14 Dec	Frontier Airlines
06 Dec - 13 Dec	Frontier Airlines
18 Dec - 22 Dec	Frontier Airlines
16 Dec - 31 Dec	Frontier Airlines
30 Dec - 04 Jan	Delta
18 Dec - 27 Dec	Frontier Airlines
20 Dec - 03 Jan	Frontier Airlines
25 Dec - 01 Jan	Frontier Airlines

Also check the deals for one-way flights from Chicago to Houston 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 Chicago to Houston in December from $179

Return flights