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

Return flights

11 Dec - 24 Jan	Iberia
03 Dec - 11 Dec	British Airways
01 Dec - 13 Dec	British Airways
11 Dec - 30 Dec	Finnair
07 Dec - 22 Dec	Air Canada
17 Dec - 30 Jan	United
13 Dec - 03 Jan	Aeromexico
23 Dec - 29 Dec	British Airways
16 Dec - 05 Jan	British Airways
19 Dec - 30 Jan	United
26 Dec - 03 Jan	Delta

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 915€

Return flights