Cheapest one-way flights from Chicago to Lisbon in December from $300

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

One-Way flights

11 Dec Spirit Airlines
12 Dec Frontier Airlines
07 Dec Spirit Airlines
01 Dec Spirit Airlines
14 Dec Spirit Airlines
07 Dec TAP direct
14 Dec TAP direct
17 Dec Frontier Airlines
30 Dec Air Canada
26 Dec Aer Lingus

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

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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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