Cheapest return flights from Knoxville to Jacksonville in December from $76

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

Return flights

18 Dec - 21 Dec Allegiant Air direct
23 Dec - 08 Jan Allegiant Air direct
18 Dec - 18 Dec Allegiant Air direct
21 Dec - 21 Dec Allegiant Air direct
18 Dec - 23 Dec Allegiant Air direct
21 Dec - 08 Jan Allegiant Air direct
23 Dec - 23 Dec Allegiant Air direct
21 Dec - 23 Dec Allegiant Air direct
18 Dec - 27 Dec Allegiant Air direct
23 Dec - 27 Dec Allegiant Air direct
21 Dec - 27 Dec Allegiant Air direct
04 Dec - 08 Dec Allegiant Air

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

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