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

Return flights

20 Dec - 29 Jan	United
20 Dec - 24 Dec	United
20 Dec - 22 Dec	United
22 Dec - 29 Dec	Delta	direct
21 Dec - 25 Dec	Delta	direct
21 Dec - 26 Dec	Aeromexico
21 Dec - 27 Dec	Aeromexico
22 Dec - 28 Dec	Aeromexico
20 Dec - 29 Dec	United
20 Dec - 23 Dec	United
21 Dec - 28 Dec	Aeromexico
22 Dec - 01 Jan	jetBlue
30 Dec - 05 Jan	Aeromexico
29 Dec - 16 Jan	Spirit Airlines
29 Dec - 14 Jan	Spirit Airlines
29 Dec - 17 Jan	Spirit Airlines
29 Dec - 13 Jan	Spirit Airlines
20 Dec - 06 Jan	United
22 Dec - 01 Jan	jetBlue	direct
30 Dec - 16 Jan	Spirit Airlines

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 283€

Return flights