AirHint found the following cheapest return flights from San Francisco (SFO) to Cancun (CUN) in September 2026 (see full year).
Return flights
| 25 Sep - 03 Oct | Aeromexico | ||
| 25 Sep - 03 Oct | United | direct | |
| 01 Sep - 30 Sep | Delta |
Also check the deals for one-way flights from San Francisco to Cancun in September.
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