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

Return flights

03 Sep - 17 Sep	LATAM Airlines Group
21 Sep - 28 Sep	Sky Airline
03 Sep - 15 Oct	LATAM Airlines Group
29 Sep - 06 Oct	Avianca
15 Sep - 24 Sep	Avianca
14 Sep - 26 Sep	LATAM Airlines Group
15 Sep - 26 Sep	Avianca
10 Sep - 24 Sep	JetSmart
15 Sep - 30 Sep	LATAM Airlines Group
15 Sep - 25 Sep	LATAM Airlines Group
08 Sep - 23 Sep	LATAM Airlines Group
01 Sep - 30 Sep	Avianca
01 Sep - 23 Oct	Avianca
02 Sep - 15 Oct	LATAM Airlines Group
03 Sep - 16 Oct	LATAM Airlines Group
16 Sep - 17 Oct	Avianca
11 Sep - 18 Oct	Sky Airline
05 Sep - 16 Oct	Air France

Also check the deals for one-way flights from Santiago to Lisbon 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 Lisbon in September from 901€

Return flights