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

Return flights

24 Dec - 01 Jan	Air Canada
24 Dec - 06 Jan	Air Canada
24 Dec - 02 Jan	Air Canada
30 Dec - 07 Jan	Delta
20 Dec - 14 Jan	United
24 Dec - 03 Jan	Air Canada
06 Dec - 19 Dec	British Airways
24 Dec - 04 Jan	United
28 Dec - 04 Jan	Virgin Atlantic

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 852€

Return flights