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

Return flights

07 Dec - 10 Dec	Delta	direct
07 Dec - 11 Dec	Delta	direct
02 Dec - 06 Dec	Delta
30 Dec - 08 Jan	Delta	direct
08 Dec - 10 Dec	Spirit Airlines
09 Dec - 10 Dec	Spirit Airlines
03 Dec - 10 Dec	Spirit Airlines
03 Dec - 04 Dec	Spirit Airlines
03 Dec - 06 Dec	Spirit Airlines
08 Dec - 16 Dec	Spirit Airlines
08 Dec - 18 Dec	Spirit Airlines
30 Dec - 07 Jan	Delta
29 Dec - 07 Jan	Delta
25 Dec - 08 Jan	Delta
25 Dec - 07 Jan	Delta
30 Dec - 09 Jan	Spirit Airlines
28 Dec - 07 Jan	Delta
30 Dec - 10 Jan	Spirit Airlines
30 Dec - 18 Jan	Spirit Airlines
25 Dec - 06 Jan	Delta

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 264€

Return flights