Cheap Flights from Knoxville, TN to Austin, TX from $47

Return flight: Austin – Knoxville

On Cheapflightsplus.com you will find 2 direct and 366 connecting flights from Knoxville to Austin. You can compare airfare deals from 4 airlines and multiple travel sites from $47, book and save on cheap plane tickets and last minute offers. Also check out TYS-AUS flight schedule to find best flight time, convenient departure and arrival airports.

Flight Information

Below we will explain in detail what the flights cost on the destination from Knoxville to Austin depends on and how to choose the most interesting flight option for you.

Distance between Knoxville and Austin is 1418 miles. Time difference between the cities is 1h. Airplanes depart 05:45 to 21:34 from 1 Knoxville airport and arrive 05:45 to 21:34 to 3 Austin airports. Average flight time is 2h 26m.

  • The fastest flight 2h 20m
  • Average flight time 2h 26m
  • The earliest flight 05:45
  • The latest flight 21:34
  • Distance 882 ml

The cheapest months to travel to Austin are july (from 47 $), august (from 51 $), june (from 55 $).

The most expensive months are september (from 179 $), october (from 129 $), may (from 65 $).

What is the lowest airfare Knoxville to Austin?

The cheapest plane ticket found by our users is $47. This airfare is for economy class on one-way G41410 flight by Allegiant Air for July 4, 2025 which leaves Mc Ghee Tyson in Knoxville at 06:55 am and arrives at Austin Austin-Bergstrom Intl at 08:15.

Economy class
$47
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Business class
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First class
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Flight Schedule Knoxville (Tennessee) to Austin (Texas)

06:00 — 20:02
15h 2m flight time
Find flight
from$132
06:00 — 07:37 Knoxville — Orlando
G43063 Allegiant Air
10h 28m stop
18:05 — 20:02 Orlando — Austin
NK1618 Spirit Airlines
06:00 — 18:20
13h 20m flight time
Find flight
from$138
06:00 — 07:34 Knoxville — Orlando
G41439 Allegiant Air
8h 45m stop
16:19 — 18:20 Orlando — Austin
NK2288 Spirit Airlines
06:55 — 08:15
2h 20m flight time
Find flight
from$47
Knoxville — Austin
G41410 Allegiant Air
07:00 — 11:54
5h 54m flight time
Find flight
from$139
07:00 — 07:57 Knoxville — Chicago
UA1594 United Airlines
1h 3m stop
09:04 — 11:58 Chicago — Austin
UA301 United Airlines
07:00 — 13:09
7h 9m flight time
Find flight
from$139
07:00 — 08:24 Knoxville — Houston
UA4913 United Airlines
3h 43m stop
12:07 — 13:09 Houston — Austin
UA6180 United Airlines
07:15 — 13:25
7h 10m flight time
Find flight
from$119
07:15 — 09:05 Knoxville — Newark
G41396 Allegiant Air
1h 11m stop
10:16 — 13:25 Newark — Austin
NK2118 Spirit Airlines
08:52 — 16:30
8h 38m flight time
Find flight
from$135
21:34 — 23:34 Knoxville — Miami
G42120 Allegiant Air
3h 24m stop
20:45 — 23:03 Miami — Austin
NK2722 Spirit Airlines
11:01 — 11:29+1day
25h 28m flight time
Find flight
from$125
11:01 — 12:19 Knoxville — Minneapolis
G41414 Allegiant Air
20h 21m stop
08:40 — 11:29 Minneapolis — Austin
SY1685 Sun Country Airlines
11:06 — 12:38
2h 32m flight time
Find flight
from$65
Knoxville — Austin
G43061 Allegiant Air
11:23 — 08:55+1day
22h 32m flight time
Find flight
from$129
11:08 — 13:12 Knoxville — Miami
G4502 Allegiant Air
17h 37m stop
07:00 — 08:55 Miami — Austin
NK517 Spirit Airlines
14:28 — 19:14+1day
29h 46m flight time
Find flight
from$137
14:28 — 15:35 Knoxville — Las Vegas
G444 Allegiant Air
22h 43m stop
14:18 — 19:14 Las Vegas — Austin
NK2627 Spirit Airlines
15:00 — 19:15
5h 15m flight time
Find flight
from$117
15:00 — 16:31 Knoxville — Sanford
G43024 Allegiant Air
1h 3m stop
17:34 — 19:15 Sanford — Austin
G42917 Allegiant Air
15:01 — 19:11
5h 10m flight time
Find flight
from$115
15:01 — 16:32 Knoxville — Sanford
G41396 Allegiant Air
1h 3m stop
17:35 — 19:11 Sanford — Austin
G41242 Allegiant Air
17:30 — 23:40
7h 10m flight time
Find flight
from$109
17:30 — 19:01 Knoxville — Denver
F94369 Frontier Airlines
1h 23m stop
20:24 — 23:40 Denver — Austin
F92890 Frontier Airlines
18:15 — 19:15+1day
26h flight time
Find flight
from$114
18:15 — 19:47 Knoxville — Sanford
G41418 Allegiant Air
21h 47m stop
17:34 — 19:15 Sanford — Austin
G42917 Allegiant Air
Full flight schedule will help you in detecting at what time planes fly from Knoxville to Austin. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.
*Departure and arrival times - local. Updated on October 16, 2025.

Popular Airlines on the Route

The flight Knoxville — Austin is served by 4 regular airlines and 2 low-cost airlines. Most of the flights on this route are operated by Alaska Airlines - 1 departures per week at the price of from $ 770 . And the most expensive tickets are offered by Alaska Airlines airline - from $ 770.

Direct flights

There are 2 nonstop flights on the route. The fastest direct flight is G41410 by Allegiant Air takes 2h 20m and the cheapest is G41410 by Allegiant Air for $47.

  • G4 - Allegiant Air
    from $47
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See more direct flights

Connecting Flights

There are 366 flights with layovers on the route. The fastest connecting flight is UA4913 by United Airlines takes 4h 11m and the cheapest is G41410 by Allegiant Air for $109.

  • AS - Alaska Airlines
    from $770
    Find
  • F9 - Frontier Airlines
    from $109
    Find
  • UA - United Airlines
    from $139
    Find
  • G4 - Allegiant Air
    from $114
    Find
See more connecting flights

Airports

You can fly from Knoxville to Austin from 1 airports (Mc Ghee Tyson).

Knoxville airports

  • Mc Ghee Tyson-TYS
    from $47
    Find

Austin airports

  • Austin-Bergstrom Intl-AUS
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  • Austin-ASQ
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  • Camp Maybry AHP-MMR
    Find

How to book a plane ticket yourself?

How to book an air ticket yourself?
  • Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
  • Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
  • Click «Buy» when you are ready — our system will redirect you to the site that sells the selected flight ticket.
  • Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
  • That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.

    To find a plane ticket, please select dates.

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