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

Return flights

25 Dec - 29 Jan	Air Canada
12 Dec - 31 Dec	Iberia
24 Dec - 24 Jan	Air Canada
26 Dec - 17 Jan	Air Canada
10 Dec - 11 Jan	Air Canada
25 Dec - 13 Jan	Air Canada
27 Dec - 31 Jan	Air Canada
26 Dec - 05 Jan	Air Canada
02 Dec - 10 Dec	Iberia For Level
23 Dec - 05 Jan	Avianca
18 Dec - 27 Jan	Avianca
26 Dec - 14 Jan	Air Canada
19 Dec - 29 Dec	British Airways

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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Santiago to London in December from 786€

Return flights