AirHint found the following cheapest return flights from San Francisco (SFO) to Mexico City (MEX) in January 2026 (see full year).

Return flights

12 Jan - 22 Jan	Frontier Airlines
14 Jan - 21 Jan	Frontier Airlines
16 Jan - 22 Jan	Frontier Airlines
12 Jan - 17 Jan	Frontier Airlines
16 Jan - 27 Jan	Frontier Airlines
13 Jan - 16 Jan	Hawaiian Airlines
15 Jan - 22 Jan	Frontier Airlines
24 Jan - 27 Jan	Aeromexico	direct
19 Jan - 31 Jan	Aeromexico	direct
23 Jan - 31 Jan	Aeromexico	direct
21 Jan - 04 Feb	Aeromexico	direct
30 Jan - 01 Feb	Aeromexico	direct
25 Jan - 01 Feb	United	direct
05 Jan - 05 Feb	United	direct

Also check the deals for one-way flights from San Francisco to Mexico City in January.

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 San Francisco to Mexico City in January from $255

Return flights