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Cheap flights from Austin to Knoxville from $81

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Austin to Knoxville departing on 12/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Allegiant Air Logo
4:05 pm - 7:14 pmAUS-TYS
2h 09mnonstop
Allegiant Air Logo
1:41 pm - 3:15 pmTYS-AUS
2h 34mnonstop
$95Allegiant Air
Find Deal
Mon, Dec 8 - Mon, Dec 15
Allegiant Air Logo
4:05 pm - 7:14 pmAUS-TYS
2h 09mnonstop
Allegiant Air Logo
4:23 pm - 5:57 pmTYS-AUS
2h 34mnonstop
$106Allegiant Air
Find Deal
Mon, Dec 8 - Mon, Dec 22
Allegiant Air Logo
4:05 pm - 7:14 pmAUS-TYS
2h 09mnonstop
Allegiant Air Logo
1:41 pm - 3:15 pmTYS-AUS
2h 34mnonstop
$109Allegiant Air
Find Deal
Fri, Dec 12 - Mon, Dec 15
Allegiant Air Logo
4:05 pm - 7:14 pmAUS-TYS
2h 09mnonstop
Allegiant Air Logo
1:41 pm - 3:15 pmTYS-AUS
2h 34mnonstop
$139Allegiant Air
Find Deal
Mon, Dec 8 - Fri, Dec 12
Allegiant Air Logo
4:05 pm - 7:14 pmAUS-TYS
2h 09mnonstop
Allegiant Air Logo
1:41 pm - 3:15 pmTYS-AUS
2h 34mnonstop
$140Allegiant Air
Find Deal
Fri, Dec 5 - Mon, Dec 8
Allegiant Air Logo
7:44 pm - 10:52 pmAUS-TYS
2h 08mnonstop
Allegiant Air Logo
1:41 pm - 3:15 pmTYS-AUS
2h 34mnonstop
$147Allegiant Air
Find Deal
Mon, Dec 1 - Fri, Dec 5
Multiple Airlines Logo
4:05 pm - 7:14 pmAUS-TYS
2h 09mnonstop
Multiple Airlines Logo
4:52 pm - 12:14 amTYS-AUS
8h 22m1 stop
$160Multiple Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
Frontier Logo
6:55 am - 3:57 pmAUS-TYS
8h 02m1 stop
Frontier Logo
4:46 pm - 12:14 amTYS-AUS
8h 28m1 stop
$162Frontier
Find Deal
Mon, Dec 8 - Mon, Dec 22
Multiple Airlines Logo
4:05 pm - 7:14 pmAUS-TYS
2h 09mnonstop
Multiple Airlines Logo
4:52 pm - 12:14 amTYS-AUS
8h 22m1 stop
$164Multiple Airlines
Find Deal
Fri, Dec 12 - Mon, Dec 15
Multiple Airlines Logo
4:05 pm - 7:14 pmAUS-TYS
2h 09mnonstop
Multiple Airlines Logo
6:30 am - 9:57 pmTYS-AUS
16h 27m1 stop
$169Multiple Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 22

Frontier flights from Austin to Knoxville

Our best Frontier deals on Austin to Knoxville flight tickets
Frontier
Dec 8
AUS6:55 amAustin Bergstrom
8h 02m
1 stop
TYS3:57 pmKnoxville McGhee Tyson
Dec 22
TYS4:46 pmKnoxville McGhee Tyson
8h 28m
1 stop
AUS12:14 amAustin Bergstrom
$162
Find similar
Frontier
Jan 30
AUS6:55 amAustin Bergstrom
7h 35m
1 stop
TYS3:30 pmKnoxville McGhee Tyson
Feb 2
TYS4:30 pmKnoxville McGhee Tyson
8h 46m
1 stop
AUS12:16 amAustin Bergstrom
$197
Find similar
Frontier
Dec 7
AUS6:55 amAustin Bergstrom
8h 02m
1 stop
TYS3:57 pmKnoxville McGhee Tyson
Dec 11
TYS4:52 pmKnoxville McGhee Tyson
8h 22m
1 stop
AUS12:14 amAustin Bergstrom
$208
Find similar

Allegiant Air flights from Austin to Knoxville

Our best Allegiant Air deals on Austin to Knoxville flight tickets
Allegiant Air
Dec 8
AUS4:05 pmAustin Bergstrom
2h 09m
TYS7:14 pmKnoxville McGhee Tyson
Dec 15
TYS1:41 pmKnoxville McGhee Tyson
2h 34m
AUS3:15 pmAustin Bergstrom
$95
Find similar
Allegiant Air
Dec 8
AUS4:05 pmAustin Bergstrom
2h 09m
TYS7:14 pmKnoxville McGhee Tyson
Dec 22
TYS4:23 pmKnoxville McGhee Tyson
2h 34m
AUS5:57 pmAustin Bergstrom
$106
Find similar
Allegiant Air
Dec 12
AUS4:05 pmAustin Bergstrom
2h 09m
TYS7:14 pmKnoxville McGhee Tyson
Dec 15
TYS1:41 pmKnoxville McGhee Tyson
2h 34m
AUS3:15 pmAustin Bergstrom
$109
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Austin to Knoxville that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 24, 2025.
Use the filters below to find and compare flights from Austin to Knoxville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

AustinKnoxville

AUS - TYS

AUSTYS

Austin Bergstrom

Mon 12/8

4:05 pm-7:14 pm

Nonstop2h 09m

Knoxville McGhee Tyson

Mon 12/15

1:41 pm-3:15 pm

Nonstop2h 34m

$95

AustinKnoxville

AUS - TYS

AUSTYS

Austin Bergstrom

Mon 12/8

4:05 pm-7:14 pm

Nonstop2h 09m

Knoxville McGhee Tyson

Mon 12/22

4:23 pm-5:57 pm

Nonstop2h 34m

$106

AustinKnoxville

AUS - TYS

AUSTYS

Austin Bergstrom

Fri 12/12

4:05 pm-7:14 pm

Nonstop2h 09m

Knoxville McGhee Tyson

Mon 12/15

1:41 pm-3:15 pm

Nonstop2h 34m

$109

AustinKnoxville

AUS - TYS

AUSTYS

Austin Bergstrom

Mon 12/8

4:05 pm-7:14 pm

Nonstop2h 09m

Knoxville McGhee Tyson

Fri 12/12

1:41 pm-3:15 pm

Nonstop2h 34m

$139

AustinKnoxville

AUS - TYS

AUSTYS

Austin Bergstrom

Fri 12/5

4:05 pm-7:14 pm

Nonstop2h 09m

Knoxville McGhee Tyson

Mon 12/8

1:41 pm-3:15 pm

Nonstop2h 34m

$140

AustinKnoxville

AUS - TYS

AUSTYS

Austin Bergstrom

Mon 12/1

7:44 pm-10:52 pm

Nonstop2h 08m

Knoxville McGhee Tyson

Fri 12/5

1:41 pm-3:15 pm

Nonstop2h 34m

$147

AustinKnoxville

AUS - TYS

AUSTYS

Austin Bergstrom

Mon 12/8

4:05 pm-7:14 pm

Nonstop2h 09m

Knoxville McGhee Tyson

Mon 12/15

4:52 pm-12:14 am

1 stop8h 22m

$160

AustinKnoxville

AUS - TYS

AUSTYS

Austin Bergstrom

Mon 12/8

6:55 am-3:57 pm

1 stop8h 02m

Knoxville McGhee Tyson

Mon 12/22

4:46 pm-12:14 am

1 stop8h 28m

$162

AustinKnoxville

AUS - TYS

AUSTYS

Austin Bergstrom

Fri 12/12

4:05 pm-7:14 pm

Nonstop2h 09m

Knoxville McGhee Tyson

Mon 12/15

4:52 pm-12:14 am

1 stop8h 22m

$164

AustinKnoxville

AUS - TYS

AUSTYS

Austin Bergstrom

Mon 12/8

4:05 pm-7:14 pm

Nonstop2h 09m

Knoxville McGhee Tyson

Mon 12/22

6:30 am-9:57 pm

1 stop16h 27m

$169

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Knoxville from

How to get the cheapest flight ticket from Austin to Knoxville

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Knoxville?

The month of October is, on average, the cheapest month to fly to Knoxville from Austin, with most prices found around $248. If you aren’t able to travel during the month of October, then book flights to Knoxville from Austin during August instead. Flights to Knoxville in August, while not as cheap as those in October, still average around $261.

What is the cheapest day to depart on your flight to Knoxville?

The cheapest day to depart from Austin to Knoxville is on a Sunday. Travelers who choose to depart for Knoxville on a Sunday will often find tickets for as low as $140. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Austin to Knoxville for around $340.

What is the cheapest time of day to depart on your flight to Knoxville?

In the evening is the cheapest time of day to fly from Austin to Knoxville when you can find flight prices for as low as $104. Flying to Knoxville in the evening is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Knoxville is in the afternoon when prices are around $217.

What is the cheapest Austin Bergstrom to Knoxville McGhee Tyson flight route?

Fly from Austin Bergstrom to Knoxville McGhee Tyson for the best Austin Bergstrom - Knoxville McGhee Tyson flight prices

How far in advance should I book a flight to Knoxville?

You are more likely to see cheaper flights to Knoxville from Austin when booking weeks ahead of your departure date. In general, you can expect to find flights to Knoxville for around $290 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Knoxville from Austin for as low as $178 on momondo.

What cabin class options are available on Austin Bergstrom to Knoxville McGhee Tyson flights?

There is only 1 cabin class available to choose from on Austin Bergstrom to Knoxville McGhee Tyson flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Austin to Knoxville flight prices changed over time?

As of November 2025, prices for Austin to Knoxville flights are approximately 63% more expensive when compared to flights at the same time last year.

When to book flights from Austin to Knoxville

Are you open to changing your travel dates? Check out the ideal times to fly from Austin to Knoxville according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Austin to Knoxville (AUS to TYS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Austin to Knoxville

Best Price Found

$75

Fastest flight time

2h 09m

Direct flights

Tue, Thu, Sat and Sun

Airports in Knoxville

1 airport
The best one-way flight to Knoxville from Austin in the past 72 hours is $75. The best round-trip flight deal from Austin to Knoxville found on momondo in the last 72 hours is $195.
The fastest flight from Austin to Knoxville takes 2h 09m
Direct flights go from Austin to Knoxville on Tuesday, Thursday, Saturday and Sunday. The only airline offering direct flights is Allegiant Air.
There is 1 airport near Knoxville: Knoxville McGhee Tyson (TYS)
Search flight deals

  • How far is Austin Bergstrom to Knoxville McGhee Tyson by plane?

    The straight-line distance from Austin Bergstrom to Knoxville McGhee Tyson is 889.3 mi. 2h 08m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Austin Bergstrom Airport to Knoxville McGhee Tyson Airport?

    Prices for flights from Austin Bergstrom Airport to Knoxville McGhee Tyson Airport refresh daily.

  • How many operators does momondo search for flights from Austin Bergstrom Airport to Knoxville McGhee Tyson Airport?

  • How old do you have to be to fly from Austin Bergstrom Airport to Knoxville McGhee Tyson Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Austin Bergstrom Airport to Knoxville McGhee Tyson Airport.

  • What documentation or ID do you need to fly to Knoxville McGhee Tyson Airport?

    The travel and health documents you'll need for your trip to Knoxville McGhee Tyson Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Knoxville McGhee Tyson Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Austin to Knoxville?

  • What is the most popular airline from Austin to Knoxville?

Best airlines flying from Austin to Knoxville

Compare and see reviews for airlines that fly from Austin to Knoxville with momondo
Airline
Rating
Free Cancellation
Price
Allegiant AirPriceFrom $85Free CancellationRating
7.2
701 reviews
Search Allegiant Air flights
DeltaPriceFrom $172Free CancellationRating
7.9
7,998 reviews
Search Delta flights
United AirlinesPriceFrom $174Free CancellationRating
7.4
9,044 reviews
Search United Airlines flights
American AirlinesPriceFrom $223Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights

  • Allegiant Air Flights From Austin to Knoxville

    Allegiant Air flight deals from Austin to Knoxville start from $85 round-trip. Over the 1 Allegiant Air flight for this route in a normal week, average airfare is usually $188 round-trip - but some users have found much cheaper deals with momondo.

Traveling to a place near Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Pigeon Forge
Gatlinburg
Cherokee
Bryson City
Morristown
Corbin
Crossville
Maryville
Murphy
Alcoa
Oak Ridge
Newport
Lenoir City
Kodak
Dandridge
Clinton
Jefferson City
Rockford

Why use momondo?

Why should I use momondo to find a flight deal from Austin to Knoxville?

Finding the right flight to Knoxville from Austin is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Knoxville quick and easy, saving you time and money.

Can I find flights from Austin to Knoxville with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Austin to Knoxville flights to just show those with flexible booking policies.

How can momondo help me find flights from Austin to Knoxville?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Knoxville from Austin.

I’m not ready to book a flight from Austin to Knoxville right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Austin to Knoxville flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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