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Cheap flights from Knoxville to Austin from $103

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 12/22. 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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Cheap round-trip flights

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Allegiant Air Logo
1:41 pm - 3:15 pmTYS-AUS
2h 34mnonstop
Allegiant Air Logo
4:05 pm - 7:14 pmAUS-TYS
2h 09mnonstop
$106Allegiant Air
Find Deal
Fri, Dec 12 - Mon, Dec 15
Frontier Logo
4:52 pm - 12:14 amTYS-AUS
8h 22m1 stop
Frontier Logo
6:55 am - 3:57 pmAUS-TYS
8h 02m1 stop
$110Frontier
Find Deal
Thu, Dec 4 - Thu, Dec 11
Multiple Airlines Logo
1:41 pm - 3:15 pmTYS-AUS
2h 34mnonstop
Multiple Airlines Logo
6:55 am - 3:57 pmAUS-TYS
8h 02m1 stop
$125Multiple Airlines
Find Deal
Fri, Dec 12 - Mon, Dec 15
Allegiant Air Logo
1:41 pm - 3:15 pmTYS-AUS
2h 34mnonstop
Allegiant Air Logo
6:38 pm - 9:47 pmAUS-TYS
2h 09mnonstop
$127Allegiant Air
Find Deal
Mon, Dec 15 - Fri, Dec 19
Multiple Airlines Logo
1:41 pm - 3:15 pmTYS-AUS
2h 34mnonstop
Multiple Airlines Logo
6:55 am - 3:57 pmAUS-TYS
8h 02m1 stop
$131Multiple Airlines
Find Deal
Fri, Dec 5 - Thu, Dec 11
Delta Logo
8:35 am - 2:19 pmTYS-AUS
6h 44m1 stop
Delta Logo
1:42 pm - 6:58 pmAUS-TYS
4h 16m1 stop
$259Delta
Find Deal
Sat, Dec 6 - Sat, Dec 13
United Airlines Logo
10:50 am - 7:52 pmTYS-AUS
10h 02m2 stops
United Airlines Logo
7:00 am - 1:17 pmAUS-TYS
5h 17m1 stop
$264United Airlines
Find Deal
Sat, Dec 6 - Sat, Dec 13
United Airlines Logo
9:10 am - 1:13 pmTYS-AUS
5h 03m1 stop
United Airlines Logo
2:15 pm - 7:55 pmAUS-TYS
4h 40m1 stop
$289United Airlines
Find Deal
Fri, Feb 13 - Tue, Feb 17
Delta Logo
12:50 pm - 6:32 pmTYS-AUS
6h 42m1 stop
Delta Logo
5:25 am - 10:46 amAUS-TYS
4h 21m1 stop
$319Delta
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Fri, Dec 12 - Sun, Dec 14
American Airlines Logo
4:00 pm - 10:04 pmTYS-AUS
7h 04m1 stop
American Airlines Logo
10:31 am - 3:46 pmAUS-TYS
4h 15m1 stop
$339American Airlines
Find Deal
Mon, Jan 19 - Mon, Jan 26

Allegiant Air flights from Knoxville to Austin

Our best Allegiant Air deals on Knoxville to Austin flight tickets
Allegiant Air
Dec 12
TYS1:41 pmKnoxville McGhee Tyson
2h 34m
AUS3:15 pmAustin Bergstrom
Dec 15
AUS4:05 pmAustin Bergstrom
2h 09m
TYS7:14 pmKnoxville McGhee Tyson
$106
Find similar
Allegiant Air
Dec 15
TYS1:41 pmKnoxville McGhee Tyson
2h 34m
AUS3:15 pmAustin Bergstrom
Dec 19
AUS6:38 pmAustin Bergstrom
2h 09m
TYS9:47 pmKnoxville McGhee Tyson
$127
Find similar
Allegiant Air
Nov 14
TYS12:50 pmKnoxville McGhee Tyson
2h 39m
AUS2:29 pmAustin Bergstrom
Nov 17
AUS3:19 pmAustin Bergstrom
2h 04m
TYS6:23 pmKnoxville McGhee Tyson
$132
Find similar

Frontier flights from Knoxville to Austin

Our best Frontier deals on Knoxville to Austin flight tickets
Frontier
Dec 4
TYS4:52 pmKnoxville McGhee Tyson
8h 22m
1 stop
AUS12:14 amAustin Bergstrom
Dec 11
AUS6:55 amAustin Bergstrom
8h 02m
1 stop
TYS3:57 pmKnoxville McGhee Tyson
$110
Find similar
Frontier
Dec 8
TYS4:52 pmKnoxville McGhee Tyson
8h 22m
1 stop
AUS12:14 amAustin Bergstrom
Dec 11
AUS6:55 amAustin Bergstrom
8h 02m
1 stop
TYS3:57 pmKnoxville McGhee Tyson
$128
Find similar
Frontier
Nov 22
TYS8:05 pmKnoxville McGhee Tyson
14h 16m
1 stop
AUS9:21 amAustin Bergstrom
Nov 28
AUS6:45 amAustin Bergstrom
8h 08m
1 stop
TYS3:53 pmKnoxville McGhee Tyson
$185
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 November 6, 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 12/12

1:41 pm-3:15 pm

Nonstop2h 34m

Austin Bergstrom

Mon 12/15

4:05 pm-7:14 pm

Nonstop2h 09m

$106

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Thu 12/4

4:52 pm-12:14 am

1 stop8h 22m

Austin Bergstrom

Thu 12/11

6:55 am-3:57 pm

1 stop8h 02m

$110

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Fri 12/12

1:41 pm-3:15 pm

Nonstop2h 34m

Austin Bergstrom

Mon 12/15

6:55 am-3:57 pm

1 stop8h 02m

$125

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Mon 12/15

1:41 pm-3:15 pm

Nonstop2h 34m

Austin Bergstrom

Fri 12/19

6:38 pm-9:47 pm

Nonstop2h 09m

$127

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Fri 12/5

1:41 pm-3:15 pm

Nonstop2h 34m

Austin Bergstrom

Thu 12/11

6:55 am-3:57 pm

1 stop8h 02m

$131

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Sat 12/6

8:35 am-2:19 pm

1 stop6h 44m

Austin Bergstrom

Sat 12/13

1:42 pm-6:58 pm

1 stop4h 16m

$259

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Sat 12/6

10:50 am-7:52 pm

2 stops10h 02m

Austin Bergstrom

Sat 12/13

7:00 am-1:17 pm

1 stop5h 17m

$264

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Fri 2/13

9:10 am-1:13 pm

1 stop5h 03m

Austin Bergstrom

Tue 2/17

2:15 pm-7:55 pm

1 stop4h 40m

$289

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Fri 12/12

12:50 pm-6:32 pm

1 stop6h 42m

Austin Bergstrom

Sun 12/14

5:25 am-10:46 am

1 stop4h 21m

$319

KnoxvilleAustin

TYS - AUS

TYSAUS

Knoxville McGhee Tyson

Mon 1/19

4:00 pm-10:04 pm

1 stop7h 04m

Austin Bergstrom

Mon 1/26

10:31 am-3:46 pm

1 stop4h 15m

$339

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 October. Flight prices, which tend to average around $212, are often lower during this time because this is during the off-season. If you’re not able to fly to Austin in October, then December is your next best option. Flight prices from Knoxville to Austin during December 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 Tuesday when prices can be found for as low as $124. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Knoxville to Austin for around $184.

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 evening, with an average ticket price of $216. Departure times in the evening 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 $289 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 $169 on momondo.

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

There is only 1 cabin class 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 November 2025, prices for Knoxville to Austin flights are approximately 24% cheaper 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

$89

Fastest flight time

2h 34m

Direct flights

Mon, Tue, Thu, Sat and Sun

Airports in Austin

1 airport
The best one-way flight to Austin from Knoxville in the past 72 hours is $89. The best round-trip flight deal from Knoxville to Austin found on momondo in the last 72 hours is $140.
The fastest flight from Knoxville to Austin takes 2h 34m
Direct flights go from Knoxville to Austin on Monday, Tuesday, Thursday, Saturday and Sunday. 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 34m.

  • 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 $88Free CancellationRating
7.2
697 reviews
Search Allegiant Air flights
DeltaPriceFrom $216Free CancellationRating
7.9
8,001 reviews
Search Delta flights
American AirlinesPriceFrom $228Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights
United AirlinesPriceFrom $233Free CancellationRating
7.4
9,007 reviews
Search United Airlines flights

Traveling to a place near Austin?

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