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Cheap flights from Knoxville to Austin from $48

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Austin departing on 9/26. 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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Cheap round-trip flights

Allegiant Air Logo
11:06 am - 12:38 pmTYS-AUS
2h 32mnonstop
Allegiant Air Logo
1:28 pm - 4:45 pmAUS-TYS
2h 17mnonstop
$100Allegiant Air
Find Deal
Fri, Aug 15 - Mon, Aug 18
Allegiant Air Logo
12:45 pm - 2:13 pmTYS-AUS
2h 28mnonstop
Allegiant Air Logo
6:41 pm - 9:50 pmAUS-TYS
2h 09mnonstop
$120Allegiant Air
Find Deal
Fri, Oct 3 - Sun, Oct 5
Allegiant Air Logo
8:00 am - 9:32 amTYS-AUS
2h 32mnonstop
Allegiant Air Logo
10:22 am - 1:39 pmAUS-TYS
2h 17mnonstop
$127Allegiant Air
Find Deal
Fri, Aug 29 - Mon, Sep 1
Allegiant Air Logo
12:45 pm - 2:13 pmTYS-AUS
2h 28mnonstop
Allegiant Air Logo
6:41 pm - 9:50 pmAUS-TYS
2h 09mnonstop
$154Allegiant Air
Find Deal
Fri, Oct 17 - Sun, Oct 19
Logo
6:00 am - 12:59 amTYS-AUS
19h 59m2 stops
Logo
1:28 pm - 4:45 pmAUS-TYS
2h 17mnonstop
$193
Find Deal
Fri, Aug 15 - Mon, Aug 18
Logo
11:06 am - 12:38 pmTYS-AUS
2h 32mnonstop
Logo
7:15 am - 8:02 pmAUS-TYS
11h 47m1 stop
$202
Find Deal
Fri, Aug 15 - Sun, Aug 17
Delta Logo
11:54 am - 5:15 pmTYS-AUS
6h 21m1 stop
Delta Logo
4:00 pm - 11:48 pmAUS-TYS
6h 48m1 stop
$233Delta
Find Deal
Thu, Aug 28 - Sun, Aug 31
American Airlines Logo
2:16 pm - 8:22 pmTYS-AUS
7h 06m1 stop
American Airlines Logo
7:00 am - 1:38 pmAUS-TYS
5h 38m1 stop
$249American Airlines
Find Deal
Fri, Aug 29 - Sun, Aug 31
American Airlines Logo
5:30 am - 9:23 amTYS-AUS
4h 53m1 stop
American Airlines Logo
5:00 am - 11:30 amAUS-TYS
5h 30m1 stop
$259American Airlines
Find Deal
Sat, Aug 16 - Sun, Aug 17
United Airlines Logo
7:00 am - 3:23 pmTYS-AUS
9h 23m2 stops
United Airlines Logo
4:20 pm - 11:44 pmAUS-TYS
6h 24m1 stop
$324United Airlines
Find Deal
Fri, Sep 5 - Tue, Sep 9

Allegiant Air flights from Knoxville to Austin

Our best Allegiant Air deals on Knoxville to Austin flight tickets
Allegiant Air
Aug 15
TYS11:06 amKnoxville McGhee Tyson
2h 32m
AUS12:38 pmAustin Bergstrom
Aug 18
AUS1:28 pmAustin Bergstrom
2h 17m
TYS4:45 pmKnoxville McGhee Tyson
$100
Find similar
Allegiant Air
Oct 3
TYS12:45 pmKnoxville McGhee Tyson
2h 28m
AUS2:13 pmAustin Bergstrom
Oct 5
AUS6:41 pmAustin Bergstrom
2h 09m
TYS9:50 pmKnoxville McGhee Tyson
$120
Find similar
Allegiant Air
Aug 29
TYS8:00 amKnoxville McGhee Tyson
2h 32m
AUS9:32 amAustin Bergstrom
Sep 1
AUS10:22 amAustin Bergstrom
2h 17m
TYS1:39 pmKnoxville McGhee Tyson
$127
Find similar

Frontier flights from Knoxville to Austin

Our best Frontier deals on Knoxville to Austin flight tickets
Frontier
Aug 21
TYS8:36 pmKnoxville McGhee Tyson
25h 04m
1 stop
AUS8:40 pmAustin Bergstrom
Aug 25
AUS6:00 amAustin Bergstrom
11h 25m
1 stop
TYS6:25 pmKnoxville McGhee Tyson
$245
Find similar
Frontier
Sep 7
TYS5:08 pmKnoxville McGhee Tyson
7h 24m
1 stop
AUS11:32 pmAustin Bergstrom
Sep 8
AUS6:30 amAustin Bergstrom
12h 15m
1 stop
TYS7:45 pmKnoxville McGhee Tyson
$268
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Austin 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 August 2, 2025.
Use the filters below to find and compare flights from Knoxville to Austin that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Fri 8/15

11:06 am-12:38 pm

Nonstop2h 32m

Austin Bergstrom

Mon 8/18

1:28 pm-4:45 pm

Nonstop2h 17m

$100

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Fri 10/3

12:45 pm-2:13 pm

Nonstop2h 28m

Austin Bergstrom

Sun 10/5

6:41 pm-9:50 pm

Nonstop2h 09m

$120

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Fri 8/29

8:00 am-9:32 am

Nonstop2h 32m

Austin Bergstrom

Mon 9/1

10:22 am-1:39 pm

Nonstop2h 17m

$127

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Fri 10/17

12:45 pm-2:13 pm

Nonstop2h 28m

Austin Bergstrom

Sun 10/19

6:41 pm-9:50 pm

Nonstop2h 09m

$154

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Fri 8/15

6:00 am-12:59 am

2 stops19h 59m

Austin Bergstrom

Mon 8/18

1:28 pm-4:45 pm

Nonstop2h 17m

$193

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Fri 8/15

11:06 am-12:38 pm

Nonstop2h 32m

Austin Bergstrom

Sun 8/17

7:15 am-8:02 pm

1 stop11h 47m

$202

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Thu 8/28

11:54 am-5:15 pm

1 stop6h 21m

Austin Bergstrom

Sun 8/31

4:00 pm-11:48 pm

1 stop6h 48m

$233

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Fri 8/29

2:16 pm-8:22 pm

1 stop7h 06m

Austin Bergstrom

Sun 8/31

7:00 am-1:38 pm

1 stop5h 38m

$249

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Sat 8/16

5:30 am-9:23 am

1 stop4h 53m

Austin Bergstrom

Sun 8/17

5:00 am-11:30 am

1 stop5h 30m

$259

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Fri 9/5

7:00 am-3:23 pm

2 stops9h 23m

Austin Bergstrom

Tue 9/9

4:20 pm-11:44 pm

1 stop6h 24m

$324

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Knoxville to Austin

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 Austin?

The cheapest month to fly to Austin from Knoxville is in September. Flight prices, which tend to average around $228, are often lower during this time because this is during the off-season. If you’re not able to fly to Austin in September, then March is your next best option. Flight prices from Knoxville to Austin during March average around $237.

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

The cheapest day to depart on your flight to Austin is on a Wednesday when prices can be found for as low as $100. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Knoxville to Austin for around $442.

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

At noon is the cheapest time of day to fly from Knoxville to Austin when you can find flight prices for as low as $94. Flying to Austin at noon is an ideal time because this is during off-peak travel hours. Flights to Austin are more costly in the morning, with an average ticket price of $135. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

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

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

You are more likely to see cheaper flights to Austin from Knoxville when booking weeks ahead of your departure date. In general, you can expect to find flights to Austin for around $293 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Austin from Knoxville for as low as $159 on momondo.

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

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

How have Knoxville to Austin flight prices changed over time?

As of August 2025, prices for Knoxville to Austin flights are approximately 2% more expensive when compared to flights at the same time last year.

When to book flights from Knoxville to Austin

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

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

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

Best Price Found

$48

Fastest flight time

2h 20m

Direct flights

Mon, Tue, Thu, Fri and Sat

Airports in Austin

1 airport
The best one-way flight to Austin from Knoxville in the past 72 hours is $48. The best round-trip flight deal from Knoxville to Austin found on momondo in the last 72 hours is $100.
The fastest flight from Knoxville to Austin takes 2h 20m
Direct flights go from Knoxville to Austin on Monday, Tuesday, Thursday, Friday and Saturday. The only airline offering direct flights is Allegiant Air.
There is 1 airport near Austin: Austin Bergstrom (AUS)
Search flight deals

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

    A flight from Knoxville McGhee Tyson to Austin Bergstrom will travel around 889.3 mi. A reasonable flight in good conditions will take 2h 22m.

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

    Prices for flights from Knoxville McGhee Tyson Airport to Austin Bergstrom Airport were last updated today.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Knoxville McGhee Tyson Airport to Austin Bergstrom Airport.

  • What documentation or ID do you need to fly to Austin Bergstrom Airport?

    The necessary travel and health documents for your Austin Bergstrom Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

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

Best airlines flying from Knoxville to Austin

Compare and see reviews for airlines that fly from Knoxville to Austin with momondo
Airline
Rating
Free Cancellation
Price
Allegiant AirPriceFrom $87Free CancellationRating
7.2
702 reviews
Search Allegiant Air flights
DeltaPriceFrom $219Free CancellationRating
8.0
7,983 reviews
Search Delta flights
American AirlinesPriceFrom $228Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $248Free CancellationRating
7.4
8,904 reviews
Search United Airlines flights

  • Allegiant Air Flights From Knoxville to Austin

    Allegiant Air is one of the most popular airlines flying from Knoxville to Austin, operating 2 flights/week on average for this route. A good Allegiant Air flight deal for Knoxville to Austin starts from $87 round-trip, up to an average price of $133. Our users have rated Allegiant Air at 7.2/10.

Traveling to a place near Austin?

Book flights to Austin if you plan to visit one of these locations
Fredericksburg
San Marcos
Round Rock
Wimberley
Georgetown
Canyon Lake
Marble Falls
Dripping Springs
Cedar Park
Horseshoe Bay
Pflugerville
Seguin
Kyle
Bastrop
Buda
Flatonia

Why use momondo?

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

Finding the right flight to Austin from Knoxville 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 Austin quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Austin from Knoxville with this policy.

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

Once all potential Knoxville to Austin flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Knoxville to Austin flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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