Cheapest one-way flights from Chicago to Lisbon in October from 201€

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

One-Way flights

27 Oct Frontier Airlines
18 Oct Frontier Airlines
11 Oct Spirit Airlines
12 Oct Frontier Airlines
05 Oct Frontier Airlines
19 Oct TAP direct
06 Oct Spirit Airlines
13 Oct Spirit Airlines
15 Oct Frontier Airlines
11 Oct TAP direct

Also check the deals for return flights from Chicago to Lisbon in October.

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

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