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

Return flights

05 Dec - 08 Dec	SWISS
02 Dec - 07 Dec	Virgin Atlantic
03 Dec - 12 Dec	Iberia For Level
02 Dec - 05 Dec	Air Canada
31 Dec - 17 Jan	Air Canada
06 Dec - 12 Dec	Virgin Atlantic
01 Dec - 15 Dec	Air France
02 Dec - 09 Dec	Avianca
01 Dec - 12 Dec	Iberia For Level
04 Dec - 09 Dec	LATAM Airlines Group
01 Dec - 23 Dec	Air Canada
30 Dec - 25 Jan	Air France
06 Dec - 12 Jan	Vueling Airlines
12 Dec - 15 Jan	Finnair
10 Dec - 14 Jan	Finnair
10 Dec - 16 Jan	Finnair
24 Dec - 22 Jan	Delta
25 Dec - 22 Jan	Delta
24 Dec - 18 Jan	Delta
01 Dec - 17 Jan	American Airlines

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 765€

Return flights