Cheapest return flights from Chicago to Lisbon in August from $951

AirHint found the following cheapest return flights from Chicago (MDW) to Lisbon (LIS) in August 2026 (see full year).

Return flights

04 Aug - 18 Aug Delta
22 Aug - 30 Aug Delta
02 Aug - 11 Aug Delta

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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