Cheapest one-way flights from Chicago to Lisbon in May from $399

Best time to book flights for Chicago (ORD) to Lisbon (LIS) flights at AirHint

AirHint found the following cheapest one-way flights from Chicago (ORD) to Lisbon (LIS) in May 2025 (see full year).

One-Way flights

04 May Icelandair
18 May Icelandair
14 May Spirit Airlines
05 May Scandinavian Airlines
17 May Frontier Airlines
16 May Spirit Airlines
15 May Spirit Airlines
19 May Spirit Airlines
21 May Spirit Airlines
23 May Spirit Airlines

Also check the deals for return 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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