AirHint found the following cheapest return flights from Cincinnati (CVG) to Lisbon (LIS) in December 2025 (see full year).

Return flights

02 Dec - 10 Dec	Air Canada
09 Dec - 18 Dec	Air France
07 Dec - 27 Dec	Air Canada
12 Dec - 21 Dec	United
13 Dec - 19 Dec	British Airways
22 Dec - 17 Jan	Frontier Airlines
21 Dec - 10 Jan	Frontier Airlines
15 Dec - 19 Dec	Air Canada
24 Dec - 30 Dec	Frontier Airlines
20 Dec - 10 Jan	Frontier Airlines
18 Dec - 04 Jan	Frontier Airlines
19 Dec - 02 Jan	Frontier Airlines

Also check the deals for one-way flights from Cincinnati to Lisbon in December.

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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Cheapest return flights from Cincinnati to Lisbon in December from $531

Return flights