Cheapest return flights from Jacksonville to Knoxville in September from $56

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

Return flights

04 Sep - 07 Sep Allegiant Air direct
07 Sep - 11 Sep Allegiant Air direct
01 Sep - 04 Sep Allegiant Air direct
01 Sep - 07 Sep Allegiant Air direct
01 Sep - 11 Sep Allegiant Air direct
21 Sep - 28 Sep Allegiant Air direct
04 Sep - 11 Sep Allegiant Air direct
07 Sep - 28 Sep Allegiant Air direct
01 Sep - 21 Sep Allegiant Air direct
21 Sep - 25 Sep Allegiant Air direct
21 Sep - 12 Oct Allegiant Air direct
28 Sep - 12 Oct Allegiant Air direct
25 Sep - 12 Oct Allegiant Air direct

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

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.

Book a cheap hotel in Knoxville

Cheap car rent in Knoxville

Feel free to contact us with any feedback or request another flight research.