Cheapest return flights from Chicago to Lisbon in May from $493

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

Return flights

02 May - 08 May TAP direct
03 May - 10 May Finnair
02 May - 06 May Aer Lingus
04 May - 18 May British Airways
02 May - 13 May Aer Lingus
01 May - 05 May British Airways
03 May - 17 May Iberia
11 May - 10 Jun Aer Lingus
17 May - 29 May Spirit Airlines
18 May - 28 May Icelandair
02 May - 13 May TAP direct
29 May - 04 Jun British Airways
28 May - 03 Jun Finnair
31 May - 06 Jun Spirit Airlines
31 May - 07 Jun TAP direct
31 May - 06 Jun TAP direct

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

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