Cheap Frontier Airlines flights Portland (PDX) to Knoxville (TYS)

Cheap Frontier Airlines flights Portland (PDX) to Knoxville (TYS)

Prices were available within the past 7 days and start at for one-way flights and $271 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, May 22 - Thu, May 29

PDX

Portland

TYS

Knoxville

$271 Roundtrip, found 13 hours ago

$271

Roundtrip

found 13 hours ago

Select Frontier Airlines flight, departing Thu, May 22 from Portland to Knoxville, returning Thu, May 29, priced at $271 found 13 hours ago

Thu, May 22 - Sun, May 25

PDX

Portland

TYS

Knoxville

$290 Roundtrip, found 13 hours ago

$290

Roundtrip

found 13 hours ago

Select Frontier Airlines flight, departing Thu, May 22 from Portland to Knoxville, returning Sun, May 25, priced at $290 found 13 hours ago