Allegiant AirDepart20:33
Thu, Nov 12TYS → FSD
5h 03m · 1 stop
$154one way, per person
View deal
- Cheapest fare
- $154
- Cheapest month
- November
- Direct flights
- Not recently
- Quickest trip
- 5h 03m
Allegiant Air · Thu, Nov 12
from $154
Usually 1+ stop
1,380 km
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Cheapest month to fly from Knoxville to Sioux Falls
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 Knoxville to Sioux Falls
Knoxville (TYS) and Sioux Falls (FSD) 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 5h 03m. Over the next few months, one-way fares start from $154, 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 Knoxville to Sioux Falls?
The cheapest one-way fare we've seen recently is $154 with Allegiant Air, departing Thursday, November 12, 2026.
What is the cheapest month to fly from Knoxville to Sioux Falls?
November 2026 currently has the lowest fares, from $154 one way.
Are there direct flights from Knoxville to Sioux Falls?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from Knoxville to Sioux Falls?
The quickest journey we've seen takes about 5h 03m. Knoxville and Sioux Falls are around 1,380 km apart.
Which airlines fly from Knoxville to Sioux Falls?
Recent fares on this route were with Allegiant Air.
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