AirHint found the following cheapest return flights from Boston (BOS) to Cancun (CUN) in September 2025 (see full year).

Return flights

02 Sep - 04 Sep	Aeromexico
05 Sep - 09 Sep	Aeromexico
07 Sep - 13 Sep	Aeromexico
24 Sep - 01 Oct	Aeromexico
08 Sep - 12 Sep	Aeromexico
15 Sep - 22 Sep	Aeromexico
04 Sep - 08 Sep	Aeromexico
12 Sep - 17 Sep	Aeromexico
07 Sep - 12 Sep	Aeromexico
08 Sep - 12 Sep	jetBlue	direct
07 Sep - 12 Sep	jetBlue	direct
27 Sep - 04 Oct	Delta
14 Sep - 01 Oct	Spirit Airlines
16 Sep - 01 Oct	Spirit Airlines
15 Sep - 01 Oct	Spirit Airlines
23 Sep - 01 Oct	Spirit Airlines
27 Sep - 01 Oct	Spirit Airlines
23 Sep - 07 Oct	Spirit Airlines
27 Sep - 07 Oct	Spirit Airlines
23 Sep - 08 Oct	Spirit Airlines

Also check the deals for one-way flights from Boston to Cancun in September.

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 Boston to Cancun in September from $280

Return flights