Cheapest return flights from Chicago to Lisbon in August from 564€

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

17 Aug - 30 Sep Finnair
25 Aug - 01 Sep Air Canada
02 Aug - 23 Aug Air Canada
28 Aug - 21 Sep Turkish Airlines
01 Aug - 08 Aug Air Canada
31 Aug - 07 Sep Air Canada
17 Aug - 29 Sep Finnair
29 Aug - 05 Sep Finnair
30 Aug - 06 Sep British Airways
28 Aug - 07 Sep Finnair
07 Aug - 14 Aug TAP direct
02 Aug - 09 Aug Air Canada
01 Aug - 08 Aug TAP direct
02 Aug - 09 Aug TAP direct
28 Aug - 21 Sep TAP direct
02 Aug - 23 Aug TAP direct
31 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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon