Cheapest return flights from Chicago to San Jose in December from 263€

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

Return flights

05 Dec - 09 Dec Frontier Airlines
06 Dec - 12 Dec Frontier Airlines
11 Dec - 18 Dec Frontier Airlines
08 Dec - 15 Dec Frontier Airlines
31 Dec - 08 Jan Frontier Airlines
11 Dec - 14 Dec Frontier Airlines
06 Dec - 08 Dec Frontier Airlines
01 Dec - 07 Dec Frontier Airlines
13 Dec - 17 Dec Frontier Airlines
03 Dec - 07 Dec Delta
29 Dec - 06 Jan Frontier Airlines
23 Dec - 31 Dec Frontier Airlines
12 Dec - 10 Jan Southwest Airlines
24 Dec - 03 Jan Frontier Airlines
24 Dec - 01 Jan Frontier Airlines
23 Dec - 01 Jan Frontier Airlines
25 Dec - 05 Jan Frontier Airlines
29 Dec - 03 Jan Frontier Airlines
25 Dec - 01 Jan Frontier Airlines
25 Dec - 03 Jan Frontier Airlines

Also check the deals for one-way flights from Chicago to San Jose in December.

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