Cheapest return flights from Jacksonville to Knoxville in December from $78

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

Return flights

18 Dec - 23 Dec Allegiant Air direct
18 Dec - 21 Dec Allegiant Air direct
21 Dec - 23 Dec Allegiant Air direct
21 Dec - 11 Jan Allegiant Air direct
04 Dec - 07 Dec Allegiant Air direct
18 Dec - 30 Dec Allegiant Air direct
21 Dec - 30 Dec Allegiant Air direct
04 Dec - 23 Dec Allegiant Air direct
04 Dec - 18 Dec Allegiant Air direct
23 Dec - 11 Jan Allegiant Air direct
23 Dec - 30 Dec Allegiant Air direct
27 Dec - 11 Jan Allegiant Air direct
27 Dec - 30 Dec Allegiant Air direct

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

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