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

Return flights

03 Dec - 15 Dec	British Airways
05 Dec - 26 Jan	British Airways
04 Dec - 14 Dec	British Airways
17 Dec - 23 Jan	British Airways
08 Dec - 14 Jan	Delta
08 Dec - 18 Jan	Delta
01 Dec - 21 Dec	British Airways
04 Dec - 27 Dec	Delta
09 Dec - 16 Dec	KLM
31 Dec - 30 Jan	British Airways
31 Dec - 23 Jan	British Airways
30 Dec - 22 Jan	Iberia
05 Dec - 11 Jan	Delta
30 Dec - 13 Jan	Delta
01 Dec - 04 Dec	Iberia
12 Dec - 29 Dec	KLM
03 Dec - 08 Jan	Delta
01 Dec - 27 Dec	KLM
11 Dec - 18 Dec	KLM
11 Dec - 16 Dec	British Airways

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 $1203

Return flights