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

Return flights

25 Dec - 17 Jan	Air Canada
26 Dec - 17 Jan	Air Canada
11 Dec - 10 Jan	Air Canada
12 Dec - 10 Jan	LATAM Airlines Group
25 Dec - 17 Jan	British Airways	direct
19 Dec - 31 Dec	British Airways	direct
26 Dec - 17 Jan	British Airways	direct
25 Dec - 04 Jan	Iberia For Level
12 Dec - 10 Jan	British Airways	direct
26 Dec - 05 Jan	Air Canada
16 Dec - 09 Jan	Iberia
16 Dec - 17 Dec	Iberia For Level
16 Dec - 17 Dec	British Airways	direct

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 781€

Return flights