Cheapest return flights from Chicago to Lisbon in September from 424€

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

Return flights

15 Sep - 21 Sep TAP direct
06 Sep - 15 Sep TAP direct
25 Sep - 29 Sep TAP direct
15 Sep - 22 Sep TAP direct
20 Sep - 26 Sep TAP direct
22 Sep - 01 Oct TAP direct
26 Sep - 15 Oct TAP direct
11 Sep - 15 Sep TAP direct
23 Sep - 02 Oct Aer Lingus
25 Sep - 09 Oct TAP direct
24 Sep - 01 Oct Delta
08 Sep - 21 Sep Aer Lingus
08 Sep - 12 Sep Icelandair
16 Sep - 18 Sep Aer Lingus
24 Sep - 13 Oct United
18 Sep - 22 Sep TAP direct
28 Sep - 10 Oct Aer Lingus
10 Sep - 14 Oct Lufthansa
30 Sep - 07 Oct United
27 Sep - 04 Oct TAP direct

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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