Cheap flights from Billings to Knoxville

One-way fares from $411 · BIL → TYS · prices found by travellers in the last 48 hours

Compare all dates Knoxville → Billings
Cheapest fare
$411

Allegiant Air · Fri, Nov 13

Cheapest month
November

from $411

Direct flights
Not recently

Usually 1+ stop

Quickest trip
6h 13m

2,320 km

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Cheapest month to fly from Billings to Knoxville

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 Cheapest $411

Cheapest dates in November 2026

The lowest fares we've seen for each day, cheapest first.

Allegiant Air
Depart10:04 Fri, Nov 13BIL → TYS 6h 13m · 1 stop
$411one way, per person
View deal
See every date in November 2026 →

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Where to stay, what to do and getting around, from our travel partners.

Where to stay

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Things to do

Things to do in KnoxvilleTours, attractions and day trips on Klook Explore →

Getting around

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About flights from Billings to Knoxville

Billings (BIL) and Knoxville (TYS) are about 2,320 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 6h 13m. Over the next few months, one-way fares start from $411, 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 Billings to Knoxville?

The cheapest one-way fare we've seen recently is $411 with Allegiant Air, departing Friday, November 13, 2026.

What is the cheapest month to fly from Billings to Knoxville?

November 2026 currently has the lowest fares, from $411 one way.

Are there direct flights from Billings to Knoxville?

We haven't seen direct fares recently, so most journeys include at least one stop.

How long is the flight from Billings to Knoxville?

The quickest journey we've seen takes about 6h 13m. Billings and Knoxville are around 2,320 km apart.

Which airlines fly from Billings to Knoxville?

Recent fares on this route were with Allegiant Air.

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