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

Return flights

07 Sep - 06 Oct	Sky Airline
08 Sep - 06 Oct	Sky Airline
08 Sep - 01 Oct	Sky Airline
08 Sep - 09 Oct	Sky Airline
08 Sep - 10 Oct	Sky Airline
08 Sep - 03 Oct	Sky Airline
08 Sep - 05 Oct	Sky Airline
09 Sep - 02 Oct	LATAM Airlines Group
09 Sep - 07 Oct	LATAM Airlines Group
09 Sep - 06 Oct	LATAM Airlines Group
17 Sep - 22 Sep	Iberia
05 Sep - 27 Sep	Avianca
06 Sep - 23 Sep	Iberia
05 Sep - 12 Sep	Avianca
07 Sep - 24 Sep	Avianca
01 Sep - 15 Sep	Avianca
15 Sep - 27 Sep	Avianca
12 Sep - 30 Sep	Avianca
05 Sep - 25 Sep	Avianca
05 Sep - 21 Sep	Turkish Airlines

Also check the deals for one-way flights from Santiago to London in September.

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 September from $1035

Return flights