Cheapest return flights from Chicago to Lisbon in September from $563

Best time to book flights for Chicago (ORD) to Lisbon (LIS) flights at AirHint

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

Return flights

23 Sep - 30 Sep Turkish Airlines
22 Sep - 23 Oct Turkish Airlines
29 Sep - 05 Oct Turkish Airlines
12 Sep - 22 Sep Turkish Airlines
29 Sep - 05 Oct TAP direct
27 Sep - 04 Oct TAP direct
22 Sep - 23 Oct TAP direct
25 Sep - 28 Sep TAP direct
05 Sep - 14 Sep Turkish Airlines
12 Sep - 22 Sep TAP direct
06 Sep - 13 Sep TAP direct
05 Sep - 14 Sep TAP direct

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

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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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