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

Return flights

01 Dec - 10 Dec	KLM
01 Dec - 08 Dec	ITA Airways
01 Dec - 09 Dec	ITA Airways
04 Dec - 07 Dec	ITA Airways
04 Dec - 11 Dec	ITA Airways
03 Dec - 12 Dec	British Airways
04 Dec - 14 Dec	British Airways
01 Dec - 13 Dec	ITA Airways
09 Dec - 21 Jan	British Airways
01 Dec - 17 Jan	Delta
03 Dec - 18 Jan	Delta
09 Dec - 12 Jan	Delta
31 Dec - 11 Jan	Delta
31 Dec - 30 Jan	Iberia
29 Dec - 13 Jan	Luxair
08 Dec - 19 Dec	Iberia
09 Dec - 16 Dec	KLM
04 Dec - 18 Jan	Delta
08 Dec - 14 Jan	Delta
09 Dec - 06 Jan	KLM

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 907€

Return flights