Allegiant AirDepart19:13
Fri, Nov 13FSD → TYS
4h 57m · 1 stop
$166one way, per person
View deal
- Cheapest fare
- $166
- Cheapest month
- November
- Direct flights
- Not recently
- Quickest trip
- 4h 57m
Allegiant Air · Fri, Nov 13
from $166
Usually 1+ stop
1,380 km
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Cheapest month to fly from Sioux Falls 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 Sioux Falls to Knoxville
Sioux Falls (FSD) and Knoxville (TYS) are about 1,380 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 4h 57m. Over the next few months, one-way fares start from $166, 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 Sioux Falls to Knoxville?
The cheapest one-way fare we've seen recently is $166 with Allegiant Air, departing Friday, November 13, 2026.
What is the cheapest month to fly from Sioux Falls to Knoxville?
November 2026 currently has the lowest fares, from $166 one way.
Are there direct flights from Sioux Falls to Knoxville?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from Sioux Falls to Knoxville?
The quickest journey we've seen takes about 4h 57m. Sioux Falls and Knoxville are around 1,380 km apart.
Which airlines fly from Sioux Falls to Knoxville?
Recent fares on this route were with Allegiant Air.
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