Cheapest return flights from Chicago to Lisbon in May from $369

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 May 2025 (see full year).

Return flights

25 May - 05 Jun SWISS
13 May - 20 May SWISS
14 May - 21 May SWISS
13 May - 21 May British Airways
12 May - 20 May British Airways
04 May - 12 May British Airways
14 May - 22 May SWISS
11 May - 19 May SWISS
01 May - 08 May SWISS
02 May - 09 May SWISS
17 May - 27 May Air Canada
31 May - 11 Jun Spirit Airlines
24 May - 02 Jun Air Canada
24 May - 04 Jun Air Canada
27 May - 04 Jun Spirit Airlines
28 May - 05 Jun jetBlue
28 May - 18 Jun Air Canada
27 May - 03 Jun KLM
30 May - 10 Jun Air Canada
31 May - 08 Jun Spirit Airlines

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

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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