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

Return flights

20 Oct - 19 Nov	United
23 Oct - 06 Nov	United
27 Oct - 05 Nov	Scandinavian Airlines
04 Oct - 19 Oct	Icelandair
01 Oct - 05 Oct	Icelandair
21 Oct - 04 Nov	United
15 Oct - 08 Nov	SWISS
20 Oct - 19 Nov	TAP	direct
28 Oct - 22 Nov	SWISS
14 Oct - 08 Nov	SWISS
16 Oct - 08 Nov	SWISS
29 Oct - 22 Nov	SWISS
14 Oct - 21 Oct	SWISS
24 Oct - 31 Oct	SWISS
24 Oct - 29 Oct	United
08 Oct - 16 Oct	Icelandair
14 Oct - 22 Oct	SWISS
13 Oct - 23 Oct	SWISS
05 Oct - 31 Oct	SWISS
16 Oct - 21 Oct	SWISS

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 349€

Return flights