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

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

Prices were available within the past 7 days and start at for one-way flights and $247 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Jan 4 - Thu, Jan 15

TYS

Knoxville

ONT

Ontario

$247 Roundtrip, found 1 day ago

$247

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Jan 4 from Knoxville to Ontario, returning Thu, Jan 15, priced at $247 found 1 day ago

Thu, Jan 1 - Thu, Jan 15

TYS

Knoxville

ONT

Ontario

$263 Roundtrip, found 1 day ago

$263

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jan 1 from Knoxville to Ontario, returning Thu, Jan 15, priced at $263 found 1 day ago

Sun, Jan 4 - Sun, Jan 11

TYS

Knoxville

ONT

Ontario

$282 Roundtrip, found 1 day ago

$282

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Jan 4 from Knoxville to Ontario, returning Sun, Jan 11, priced at $282 found 1 day ago

Thu, Jan 1 - Sun, Jan 11

TYS

Knoxville

ONT

Ontario

$298 Roundtrip, found 1 day ago

$298

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jan 1 from Knoxville to Ontario, returning Sun, Jan 11, priced at $298 found 1 day ago

Sun, Jan 4 - Sun, Jan 18

TYS

Knoxville

ONT

Ontario

$302 Roundtrip, found 1 day ago

$302

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Jan 4 from Knoxville to Ontario, returning Sun, Jan 18, priced at $302 found 1 day ago