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

Return flights

09 Dec - 09 Jan	Aeromexico
13 Dec - 10 Jan	Spirit Airlines
09 Dec - 14 Jan	Aeromexico
10 Dec - 09 Jan	Aeromexico
11 Dec - 08 Jan	jetBlue
14 Dec - 09 Jan	jetBlue
06 Dec - 14 Dec	Spirit Airlines
02 Dec - 13 Dec	Spirit Airlines
14 Dec - 24 Jan	jetBlue
14 Dec - 08 Jan	jetBlue
14 Dec - 14 Jan	jetBlue
18 Dec - 09 Jan	Neos Air
01 Dec - 08 Dec	WORLD2FLY
23 Dec - 31 Dec	TAP
18 Dec - 30 Dec	TAP
23 Dec - 30 Dec	TAP
03 Dec - 11 Dec	WestJet
02 Dec - 03 Dec	Air Transat
09 Dec - 23 Dec	Aeromexico
11 Dec - 27 Dec	jetBlue

Also check the deals for one-way flights from Cancun to London 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 Cancun to London in December from 649€

Return flights