Cheapest return flights from Orlando to Knoxville in September from $58

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

Return flights

13 Sep - 16 Sep Allegiant Air direct
08 Sep - 11 Sep Allegiant Air direct
15 Sep - 27 Sep Allegiant Air direct
15 Sep - 17 Sep Allegiant Air direct
15 Sep - 20 Sep Allegiant Air direct
04 Sep - 11 Sep Allegiant Air direct
06 Sep - 11 Sep Allegiant Air direct
09 Sep - 11 Sep Allegiant Air direct
10 Sep - 11 Sep Allegiant Air direct
15 Sep - 01 Oct Allegiant Air direct
13 Sep - 17 Sep Allegiant Air direct
13 Sep - 01 Oct Allegiant Air direct
16 Sep - 01 Oct Allegiant Air direct
21 Sep - 01 Oct Allegiant Air direct
22 Sep - 01 Oct Allegiant Air direct
27 Sep - 01 Oct Allegiant Air direct
30 Sep - 01 Oct Allegiant Air direct
24 Sep - 01 Oct Allegiant Air direct
26 Sep - 01 Oct Allegiant Air direct
15 Sep - 04 Oct Allegiant Air direct

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

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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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