Cheapest return flights from Chicago to Lisbon in September from 420€

AirHint found the following cheapest return flights from Chicago (ORD) to Lisbon (LIS) in September 2026 (see full year).

Return flights

22 Sep - 29 Sep Air Canada
23 Sep - 30 Sep Finnair
17 Sep - 24 Sep Finnair
10 Sep - 17 Sep Turkish Airlines
02 Sep - 17 Sep Iberia
02 Sep - 12 Sep Turkish Airlines
16 Sep - 14 Oct Delta
25 Sep - 03 Oct Iberia
04 Sep - 08 Sep Iberia
17 Sep - 24 Sep TAP direct
17 Sep - 08 Oct TAP direct
02 Sep - 17 Sep TAP direct
10 Sep - 17 Sep TAP direct
25 Sep - 03 Oct TAP direct
16 Sep - 14 Oct TAP direct

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

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