Cheapest return flights from Chicago to Lisbon in August from 412€

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

Return flights

20 Aug - 24 Aug Icelandair
17 Aug - 28 Aug United
20 Aug - 27 Aug United
19 Aug - 17 Sep United
20 Aug - 26 Aug SWISS
18 Aug - 28 Aug TAP direct
17 Aug - 28 Aug TAP direct
30 Aug - 07 Sep Icelandair
23 Aug - 29 Aug TAP direct
15 Aug - 29 Aug United
16 Aug - 27 Aug United
08 Aug - 02 Sep SWISS
07 Aug - 21 Aug SWISS
07 Aug - 02 Sep SWISS
29 Aug - 02 Sep Aer Lingus
23 Aug - 06 Sep Air Canada
26 Aug - 02 Sep United
23 Aug - 06 Sep TAP direct
27 Aug - 05 Sep SWISS
28 Aug - 01 Sep Icelandair

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

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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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