Frontier AirlinesDepart12:02
Thu, Nov 12PDX → TYS
7h 44m · 2 stops
$237one way, per person
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- Cheapest fare
- $237
- Cheapest month
- November
- Direct flights
- Not recently
- Quickest trip
- 7h 44m
Frontier Airlines · Thu, Nov 12
from $237
Usually 1+ stop
3,400 km
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Cheapest month to fly from Portland to Knoxville
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in November 2026
The lowest fares we've seen for each day, cheapest first.
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About flights from Portland to Knoxville
Portland (PDX) and Knoxville (TYS) are about 3,400 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 7h 44m. Over the next few months, one-way fares start from $237, and November 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from Portland to Knoxville?
The cheapest one-way fare we've seen recently is $237 with Frontier Airlines, departing Thursday, November 12, 2026.
What is the cheapest month to fly from Portland to Knoxville?
November 2026 currently has the lowest fares, from $237 one way.
Are there direct flights from Portland to Knoxville?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from Portland to Knoxville?
The quickest journey we've seen takes about 7h 44m. Portland and Knoxville are around 3,400 km apart.
Which airlines fly from Portland to Knoxville?
Recent fares on this route were with Frontier Airlines.
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