Cheapest return flights from Chicago to Lisbon in August from $545

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

16 Aug - 21 Aug Icelandair
11 Aug - 25 Aug British Airways
11 Aug - 22 Aug Delta
04 Aug - 18 Aug KLM
15 Aug - 21 Aug Finnair
14 Aug - 20 Aug British Airways
06 Aug - 13 Aug Aer Lingus
02 Aug - 23 Aug Finnair
30 Aug - 06 Sep Turkish Airlines
26 Aug - 02 Sep United
26 Aug - 01 Sep KLM
17 Aug - 23 Aug Scandinavian Airlines
04 Aug - 16 Aug Finnair
29 Aug - 14 Sep Finnair
29 Aug - 07 Sep Finnair
31 Aug - 07 Sep TAP direct
29 Aug - 14 Sep TAP direct
30 Aug - 06 Sep TAP direct
29 Aug - 07 Sep TAP direct

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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