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

Return flights

09 Dec - 12 Jan	Air Canada
08 Dec - 27 Jan	LATAM Airlines Group
24 Dec - 31 Jan	Air Canada
12 Dec - 03 Jan	LATAM Airlines Group
24 Dec - 30 Jan	Air Canada
12 Dec - 29 Dec	LATAM Airlines Group
11 Dec - 02 Jan	Avianca
11 Dec - 25 Dec	Air Canada
25 Dec - 31 Jan	Air Canada
11 Dec - 03 Jan	Avianca
04 Dec - 11 Dec	Avianca
01 Dec - 08 Dec	Aeromexico
12 Dec - 02 Jan	LATAM Airlines Group
24 Dec - 03 Jan	Avianca
12 Dec - 28 Dec	LATAM Airlines Group
26 Dec - 31 Dec	Avianca
24 Dec - 28 Dec	Avianca
14 Dec - 30 Dec	LATAM Airlines Group
11 Dec - 24 Dec	Air Canada
13 Dec - 28 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 673€

Return flights