Cheapest return flights from Chicago to Lisbon in September from 451€

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

Return flights

10 Sep - 18 Sep Icelandair
27 Sep - 02 Oct Icelandair
27 Sep - 05 Oct Icelandair
24 Sep - 05 Oct Icelandair
29 Sep - 06 Oct SWISS
23 Sep - 01 Oct SWISS
26 Sep - 03 Oct Lufthansa
22 Sep - 18 Oct Lufthansa
30 Sep - 25 Oct Finnair
09 Sep - 16 Sep United
16 Sep - 23 Sep Aer Lingus
01 Sep - 12 Sep SWISS
03 Sep - 10 Sep British Airways
03 Sep - 12 Sep British Airways
28 Sep - 05 Oct SWISS
05 Sep - 12 Sep TAP direct
20 Sep - 26 Sep Spirit Airlines
27 Sep - 18 Oct Lufthansa
08 Sep - 15 Sep United
19 Sep - 26 Sep Aer Lingus

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

Skyscanner

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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