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

Return flights

04 Dec - 01 Jan	LATAM Airlines Group
24 Dec - 31 Dec	Air France
01 Dec - 10 Jan	LATAM Airlines Group
10 Dec - 10 Jan	LATAM Airlines Group
04 Dec - 25 Dec	LATAM Airlines Group
11 Dec - 10 Jan	Iberia
18 Dec - 09 Jan	Iberia For Level
12 Dec - 11 Jan	LATAM Airlines Group
25 Dec - 01 Jan	British Airways
23 Dec - 05 Jan	British Airways
23 Dec - 04 Jan	British Airways
11 Dec - 29 Dec	Air France
02 Dec - 23 Dec	British Airways
18 Dec - 12 Jan	British Airways
04 Dec - 20 Dec	LATAM Airlines Group

Also check the deals for one-way flights from Santiago 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 Santiago to London in December from 689€

Return flights