AirHint found the following cheapest return flights from Guadalajara (GDL) to London (LHR) in December 2025 (see full year).

Return flights

01 Dec - 07 Dec	Aeromexico
25 Dec - 11 Jan	United
25 Dec - 01 Jan	Delta
24 Dec - 07 Jan	Air Canada
12 Dec - 15 Dec	Air Canada
17 Dec - 30 Jan	United
23 Dec - 09 Jan	United
15 Dec - 01 Jan	Delta
12 Dec - 17 Dec	Air Canada
16 Dec - 01 Jan	United
24 Dec - 02 Jan	Air Canada
24 Dec - 04 Jan	Flair Airlines
23 Dec - 07 Jan	United
20 Dec - 27 Dec	British Airways

Also check the deals for one-way flights from Guadalajara 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 Guadalajara to London in December from $979

Return flights