Cheapest return ORD–LIS flights, May

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

Return flights

05 May - 12 May KLM
04 May - 15 May Iberia
04 May - 11 May KLM
06 May - 13 May KLM
06 May - 20 May Iberia
05 May - 11 May Air France
04 May - 18 May Air France
04 May - 13 May Delta
03 May - 10 May Delta
01 May - 04 May KLM
17 May - 16 Jun Air Canada
30 May - 09 Jun Frontier Airlines
30 May - 08 Jun Frontier Airlines
31 May - 12 Jun Air Canada
17 May - 15 Jun Air Canada
21 May - 01 Jun Sun Country Airlines
29 May - 01 Jun KLM
31 May - 12 Jun TAP direct

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

Powered by

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Feel free to contact us with any feedback or request another flight research.