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

Return flights

02 Dec - 15 Jan	LATAM Airlines Group
01 Dec - 13 Jan	LATAM Airlines Group
02 Dec - 12 Jan	LATAM Airlines Group
01 Dec - 12 Jan	LATAM Airlines Group
01 Dec - 11 Jan	LATAM Airlines Group
01 Dec - 31 Dec	LATAM Airlines Group
08 Dec - 16 Dec	Air Canada
21 Dec - 22 Jan	Air Canada
19 Dec - 22 Jan	Air Canada
19 Dec - 24 Jan	Air Canada
25 Dec - 27 Jan	Air Canada
19 Dec - 19 Jan	Air Canada
12 Dec - 31 Dec	Iberia For Level
20 Dec - 31 Dec	Iberia For Level
19 Dec - 20 Dec	Iberia
18 Dec - 19 Dec	Avianca
19 Dec - 20 Dec	British Airways	direct

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 698€

Return flights