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

Return flights

01 Dec - 08 Dec	Delta
03 Dec - 07 Dec	Aeromexico
21 Dec - 27 Dec	Delta	direct
23 Dec - 27 Dec	Delta	direct
27 Dec - 02 Jan	jetBlue
20 Dec - 27 Dec	Delta	direct
23 Dec - 06 Jan	Southwest Airlines
23 Dec - 06 Jan	Delta	direct
27 Dec - 01 Jan	United
21 Dec - 03 Jan	Southwest Airlines
21 Dec - 03 Jan	Delta	direct

Also check the deals for one-way flights from Boston to Cancun 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 Boston to Cancun in December from 272€

Return flights