Cheapest return flights from Chicago to Lisbon in October from $467

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

Return flights

28 Oct - 22 Nov Iberia
29 Oct - 04 Nov Lufthansa
29 Oct - 22 Nov Iberia
29 Oct - 10 Nov KLM
31 Oct - 22 Nov Aer Lingus
31 Oct - 05 Nov British Airways
31 Oct - 05 Nov TAP direct
29 Oct - 03 Nov Iberia

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

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