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

Return flights

22 Jul - 29 Jul	Air Canada
26 Jul - 06 Aug	Iberia
21 Jul - 28 Jul	Air Canada
20 Jul - 27 Jul	Finnair
26 Jul - 04 Aug	Iberia
01 Jul - 08 Jul	Air Canada
22 Jul - 02 Aug	Finnair
12 Jul - 21 Jul	Air Canada
08 Jul - 17 Jul	Finnair
08 Jul - 21 Jul	Aer Lingus
07 Jul - 28 Jul	Aer Lingus
13 Jul - 20 Jul	British Airways
08 Jul - 29 Jul	Finnair
24 Jul - 02 Aug	Finnair
26 Jul - 06 Aug	TAP	direct
29 Jul - 05 Aug	TAP	direct
24 Jul - 02 Aug	TAP	direct
25 Jul - 01 Aug	TAP	direct
22 Jul - 02 Aug	TAP	direct

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

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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Cheapest return flights from Chicago to Lisbon in July from 522€

Return flights