Cheap Frontier Airlines flights Ontario (ONT) to Knoxville (TYS)

Cheap Frontier Airlines flights Ontario (ONT) to Knoxville (TYS)

Prices were available within the past 7 days and start at for one-way flights and $570 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Oct 23 - Mon, Oct 27

ONT

Ontario

TYS

Knoxville

$570 Roundtrip, found 17 hours ago

$570

Roundtrip

found 17 hours ago

Select Frontier Airlines flight, departing Thu, Oct 23 from Ontario to Knoxville, returning Mon, Oct 27, priced at $570 found 17 hours ago