AirHint found the following cheapest return flights from Newark (EWR) to Lisbon (LIS) in October 2025 (see full year).

Return flights

11 Oct - 19 Oct	Icelandair
11 Oct - 16 Oct	Icelandair
28 Oct - 22 Nov	Air Canada
28 Oct - 05 Nov	Air Canada
21 Oct - 15 Nov	Air Canada
20 Oct - 15 Nov	Air Canada
24 Oct - 15 Nov	Air Canada
23 Oct - 15 Nov	Air Canada
21 Oct - 04 Nov	Air Canada
23 Oct - 07 Nov	Air Canada
04 Oct - 09 Oct	Icelandair
01 Oct - 05 Oct	Icelandair
19 Oct - 08 Nov	Air Canada
22 Oct - 15 Nov	Air Canada
13 Oct - 20 Oct	Air Canada
20 Oct - 27 Oct	Air Canada
24 Oct - 31 Oct	Air Canada
23 Oct - 29 Oct	Air Canada
19 Oct - 29 Oct	Air Canada
24 Oct - 28 Oct	Air Canada

Also check the deals for one-way flights from Newark to Lisbon in October.

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 Newark to Lisbon in October from $377

Return flights