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

Return flights

06 Dec - 24 Dec	Air France
01 Dec - 15 Dec	KLM
03 Dec - 13 Jan	Air Canada
03 Dec - 26 Dec	Air Canada
01 Dec - 20 Jan	Air Canada
08 Dec - 15 Dec	Air Canada
04 Dec - 18 Dec	LATAM Airlines Group
08 Dec - 07 Jan	Air Canada
04 Dec - 20 Jan	Iberia For Level
01 Dec - 12 Dec	Iberia For Level
06 Dec - 20 Dec	Vueling Airlines
07 Dec - 22 Dec	Air Canada
12 Dec - 14 Jan	Finnair
14 Dec - 21 Dec	British Airways
13 Dec - 29 Jan	Finnair
15 Dec - 31 Jan	Finnair
04 Dec - 14 Jan	Iberia
07 Dec - 21 Dec	British Airways
30 Dec - 27 Jan	British Airways
30 Dec - 25 Jan	British Airways

Also check the deals for one-way flights from London to Santiago 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 London to Santiago in December from 829€

Return flights