Cheapest return flights from Chicago to Lisbon in August from $575

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 August 2025 (see full year).

Return flights

27 Aug - 04 Sep Icelandair
04 Aug - 18 Aug Air Canada
18 Aug - 25 Aug Air Canada
12 Aug - 20 Aug Air Canada
19 Aug - 27 Aug Air Canada
18 Aug - 26 Aug Air Canada
20 Aug - 28 Aug Air Canada
15 Aug - 29 Aug TAP direct
12 Aug - 19 Aug United
11 Aug - 19 Aug United
16 Aug - 24 Aug Icelandair
31 Aug - 12 Sep SWISS
26 Aug - 03 Sep Air Canada
25 Aug - 02 Sep Air Canada
31 Aug - 08 Sep KLM
24 Aug - 01 Sep KLM
30 Aug - 11 Sep Air Canada
22 Aug - 01 Sep Scandinavian Airlines
22 Aug - 08 Sep Scandinavian Airlines
30 Aug - 06 Sep Turkish Airlines

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

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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