Cheapest return flights from Knoxville to Lisbon in December from 885€

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

Return flights

12 Dec - 03 Jan Allegiant Air
12 Dec - 04 Jan Allegiant Air
12 Dec - 02 Jan Allegiant Air
29 Dec - 05 Jan Allegiant Air
13 Dec - 03 Jan Allegiant Air
14 Dec - 03 Jan Allegiant Air
27 Dec - 04 Jan Allegiant Air

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

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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