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

Return flights

03 Dec - 08 Dec	ITA Airways
09 Dec - 26 Dec	KLM
05 Dec - 21 Jan	Luxair
10 Dec - 26 Dec	KLM
10 Dec - 21 Dec	British Airways
01 Dec - 15 Dec	British Airways
04 Dec - 08 Dec	British Airways
03 Dec - 19 Dec	British Airways
04 Dec - 16 Dec	British Airways
24 Dec - 19 Jan	Iberia
08 Dec - 23 Dec	KLM
10 Dec - 29 Dec	KLM
09 Dec - 12 Jan	Delta
10 Dec - 13 Jan	Delta
05 Dec - 14 Jan	Delta
05 Dec - 13 Jan	Delta
08 Dec - 21 Jan	Delta
08 Dec - 14 Jan	Delta
01 Dec - 21 Jan	Iberia
01 Dec - 26 Jan	Iberia

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 941€

Return flights