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

Return flights

22 Oct - 26 Oct	Icelandair
15 Oct - 19 Oct	Icelandair
04 Oct - 12 Oct	Icelandair
01 Oct - 09 Oct	Icelandair
01 Oct - 06 Oct	Air Canada
02 Oct - 05 Oct	Air Canada
06 Oct - 12 Oct	Air Canada
13 Oct - 21 Oct	Air Canada
09 Oct - 13 Oct	Air Canada
11 Oct - 19 Oct	Icelandair
29 Oct - 05 Nov	TAP	direct
23 Oct - 03 Nov	Air Canada
30 Oct - 18 Nov	TAP	direct
30 Oct - 06 Nov	Delta
30 Oct - 07 Nov	Delta
30 Oct - 06 Nov	TAP	direct
30 Oct - 07 Nov	TAP	direct
29 Oct - 11 Nov	TAP	direct
31 Oct - 03 Nov	Air Canada
31 Oct - 09 Nov	TAP	direct

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 $369

Return flights