Cheapest return flights from Chicago to Lisbon in May from $506

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

04 May - 16 May TAP direct
04 May - 14 May TAP direct
06 May - 13 May SWISS
11 May - 14 May Aer Lingus
10 May - 21 May Air Canada
21 May - 29 May Icelandair
06 May - 11 May Aer Lingus
04 May - 11 May SWISS
08 May - 15 May Aer Lingus
11 May - 18 May Aer Lingus
13 May - 03 Jun American Airlines
27 May - 03 Jun Finnair
28 May - 04 Jun Finnair
31 May - 08 Jun Icelandair
25 May - 01 Jun Air Canada
29 May - 05 Jun United
31 May - 07 Jun Aer Lingus
30 May - 07 Jun Iberia
23 May - 01 Jun Air Canada
31 May - 07 Jun TAP direct

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

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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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