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Cheap flights from Knoxville to Phoenix from $114

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 Phoenix departing on 2/15. 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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Find the cheapest flights from Knoxville to Phoenix

Cheap round-trip flights

Enter your travel dates to find the best prices.
Allegiant Air Logo
8:30 am - 11:04 am
TYS
-
PHX
4h 34mnonstop
Allegiant Air Logo
11:06 am - 5:34 pm
PHX
-
TYS
3h 28mnonstop
$200Allegiant Air
Sun, Mar 1 - Tue, Mar 10
Allegiant Air Logo
9:00 am - 11:35 am
TYS
-
PHX
4h 35mnonstop
Allegiant Air Logo
11:55 am - 5:22 pm
PHX
-
TYS
3h 27mnonstop
$217Allegiant Air
Sun, Feb 15 - Thu, Feb 19
Allegiant Air Logo
9:00 am - 11:35 am
TYS
-
PHX
4h 35mnonstop
Allegiant Air Logo
11:55 am - 5:22 pm
PHX
-
TYS
3h 27mnonstop
$224Allegiant Air
Sun, Feb 15 - Thu, Feb 19
Allegiant Air Logo
9:00 am - 11:35 am
TYS
-
PHX
4h 35mnonstop
Allegiant Air Logo
11:55 am - 5:22 pm
PHX
-
TYS
3h 27mnonstop
$233Allegiant Air
Sun, Feb 15 - Thu, Feb 19
Frontier Logo
8:13 pm - 12:41 am
TYS
-
PHX
6h 28m
1 stop
Frontier Logo
6:00 am - 7:18 pm
PHX
-
TYS
11h 18m
1 stop
$235Frontier
Mon, Feb 23 - Mon, Mar 2
Multiple Airlines Logo
8:13 pm - 8:42 am
TYS
-
PHX
14h 29m
1 stop
Multiple Airlines Logo
9:22 am - 10:07 pm
PHX
-
TYS
34h 45m
2 stops
$239Multiple Airlines
Mon, Feb 23 - Sat, Feb 28
Allegiant Air Logo
8:00 am - 9:06 am
TYS
-
PHX
4h 06mnonstop
Allegiant Air Logo
9:56 am - 4:20 pm
PHX
-
TYS
3h 24mnonstop
$244Allegiant Air
Thu, Apr 30 - Sun, May 10
Multiple Airlines Logo
5:53 pm - 12:55 am
TYS
-
PHX
33h 02m
2 stops
Multiple Airlines Logo
11:06 am - 5:34 pm
PHX
-
TYS
3h 28mnonstop
$246Multiple Airlines
Sun, Mar 1 - Tue, Mar 10
Multiple Airlines Logo
5:53 pm - 5:19 pm
TYS
-
PHX
49h 26m
3 stops
Multiple Airlines Logo
11:06 am - 5:34 pm
PHX
-
TYS
3h 28mnonstop
$250Multiple Airlines
Sun, Mar 1 - Tue, Mar 10
Multiple Airlines Logo
9:00 am - 11:35 am
TYS
-
PHX
4h 35mnonstop
Multiple Airlines Logo
8:52 am - 7:27 pm
PHX
-
TYS
8h 35m
1 stop
$251Multiple Airlines
Sun, Feb 15 - Fri, Feb 20

Allegiant Air flights from Knoxville to Phoenix Sky Harbor Intl Airport

Our best Allegiant Air deals on Knoxville to Phoenix Sky Harbor Intl Airport flight tickets
Allegiant Air
Mar 1
TYS8:30 amKnoxville McGhee Tyson
4h 34m
PHX11:04 amPhoenix Sky Harbor Intl
Mar 10
PHX11:06 amPhoenix Sky Harbor Intl
3h 28m
TYS5:34 pmKnoxville McGhee Tyson
$200
Allegiant Air
Feb 15
TYS9:00 amKnoxville McGhee Tyson
4h 35m
PHX11:35 amPhoenix Sky Harbor Intl
Feb 19
PHX11:55 amPhoenix Sky Harbor Intl
3h 27m
TYS5:22 pmKnoxville McGhee Tyson
$217
Allegiant Air
Feb 8
TYS10:05 amKnoxville McGhee Tyson
4h 26m
PHX12:31 pmPhoenix Sky Harbor Intl
Feb 12
PHX12:25 pmPhoenix Sky Harbor Intl
3h 27m
TYS5:52 pmKnoxville McGhee Tyson
$222

Frontier flights from Knoxville to Phoenix Sky Harbor Intl Airport

Our best Frontier deals on Knoxville to Phoenix Sky Harbor Intl Airport flight tickets
Frontier
Feb 23
TYS8:13 pmKnoxville McGhee Tyson
6h 28m
1 stop
PHX12:41 amPhoenix Sky Harbor Intl
Mar 2
PHX6:00 amPhoenix Sky Harbor Intl
11h 18m
1 stop
TYS7:18 pmKnoxville McGhee Tyson
$235
Frontier
Apr 10
TYS4:20 pmKnoxville McGhee Tyson
6h 54m
1 stop
PHX8:14 pmPhoenix Sky Harbor Intl
Apr 13
PHX6:50 amPhoenix Sky Harbor Intl
5h 38m
1 stop
TYS3:28 pmKnoxville McGhee Tyson
$266
Frontier
Feb 20
TYS8:12 pmKnoxville McGhee Tyson
14h 00m
1 stop
PHX8:12 amPhoenix Sky Harbor Intl
Feb 22
PHX10:51 pmPhoenix Sky Harbor Intl
18h 27m
1 stop
TYS7:18 pmKnoxville McGhee Tyson
$281

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Phoenix Sky Harbor Intl Airport 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 February 4, 2026.
Use the filters below to find and compare flights from Knoxville to Phoenix Sky Harbor Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Sun 3/1

8:30 am-11:04 am

Nonstop4h 34m

Phoenix Sky Harbor Intl

Tue 3/10

11:06 am-5:34 pm

Nonstop3h 28m

$200

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Sun 2/15

9:00 am-11:35 am

Nonstop4h 35m

Phoenix Sky Harbor Intl

Thu 2/19

11:55 am-5:22 pm

Nonstop3h 27m

$217

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Sun 2/15

9:00 am-11:35 am

Nonstop4h 35m

Phoenix Sky Harbor Intl

Thu 2/19

11:55 am-5:22 pm

Nonstop3h 27m

$224

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Sun 2/15

9:00 am-11:35 am

Nonstop4h 35m

Phoenix Sky Harbor Intl

Thu 2/19

11:55 am-5:22 pm

Nonstop3h 27m

$233

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Mon 2/23

8:13 pm-12:41 am

1 stop6h 28m

Phoenix Sky Harbor Intl

Mon 3/2

6:00 am-7:18 pm

1 stop11h 18m

$235

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Mon 2/23

8:13 pm-8:42 am

1 stop14h 29m

Phoenix Sky Harbor Intl

Sat 2/28

9:22 am-10:07 pm

2 stops34h 45m

$239

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Thu 4/30

8:00 am-9:06 am

Nonstop4h 06m

Phoenix Sky Harbor Intl

Sun 5/10

9:56 am-4:20 pm

Nonstop3h 24m

$244

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Sun 3/1

5:53 pm-12:55 am

2 stops33h 02m

Phoenix Sky Harbor Intl

Tue 3/10

11:06 am-5:34 pm

Nonstop3h 28m

$246

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Sun 3/1

5:53 pm-5:19 pm

3 stops49h 26m

Phoenix Sky Harbor Intl

Tue 3/10

11:06 am-5:34 pm

Nonstop3h 28m

$250

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Sun 2/15

9:00 am-11:35 am

Nonstop4h 35m

Phoenix Sky Harbor Intl

Fri 2/20

8:52 am-7:27 pm

1 stop8h 35m

$251

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 Phoenix from

How to get the cheapest flight ticket from Knoxville to Phoenix Sky Harbor Intl Airport

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 Phoenix Sky Harbor Intl Airport?

In general, September is the cheapest month to fly from Knoxville to Phoenix Sky Harbor Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $205. If you are unable to visit Phoenix Sky Harbor Intl Airport during the month of September, then departing from Knoxville during the month August is also very affordable. Most momondo users find prices during this month for around $229.

What is the cheapest day to depart on your flight to Phoenix Sky Harbor Intl Airport?

On average, the least expensive day to fly to Phoenix Sky Harbor Intl Airport from Knoxville is on a Friday. momondo users have found tickets for Friday departures for as low as $202. However, this price may fluctuate depending on the airline, the season, and holidays. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $380. These prices are subject to change though, so be sure to set up a Price Alert for flights to Phoenix Sky Harbor Intl Airport.

What is the cheapest time of day to depart on your flight to Phoenix Sky Harbor Intl Airport?

In the morning is the cheapest time of day to fly from Knoxville to Phoenix Sky Harbor Intl Airport when you can find flight prices for as low as $226. Flying to Phoenix Sky Harbor Intl Airport in the morning is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $240. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Knoxville McGhee Tyson to Phoenix Sky Harbor Intl flight route?

Fly from Knoxville McGhee Tyson to Phoenix Sky Harbor Intl for the best Knoxville McGhee Tyson - Phoenix Sky Harbor Intl flight prices

How far in advance should I book a flight to Phoenix Sky Harbor Intl Airport?

You are more likely to see cheaper flights to Phoenix Sky Harbor Intl Airport from Knoxville when booking weeks ahead of your departure date. In general, you can expect to find flights to Phoenix Sky Harbor Intl Airport for around $311 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Phoenix Sky Harbor Intl Airport from Knoxville for as low as $196 on momondo.

What cabin class options are available on Knoxville McGhee Tyson to Phoenix Sky Harbor Intl flights?

There is only 1 cabin class available to choose from on Knoxville McGhee Tyson to Phoenix Sky Harbor Intl 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 Phoenix Sky Harbor Intl Airport flight prices changed over time?

As of February 2026, prices for Knoxville to Phoenix Sky Harbor Intl Airport flights are approximately 34% more expensive when compared to flights at the same time last year.

When to book flights from Knoxville to Phoenix Sky Harbor Intl Airport

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

Cheap Knoxville to Phoenix Sky Harbor Intl Airport (TYS to PHX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Phoenix Sky Harbor Intl Airport

Best Price Found

$109

Fastest flight time

4h 06m

Direct flights

Mon, Wed, Fri and Sun
The best one-way flight to Phoenix Sky Harbor Intl Airport from Knoxville in the past 72 hours is $109. The best round-trip flight deal from Knoxville to Phoenix Sky Harbor Intl Airport found on momondo in the last 72 hours is $145.
The fastest flight from Knoxville to Phoenix Sky Harbor Intl Airport takes 4h 06m
Direct flights go from Knoxville to Phoenix Sky Harbor Intl Airport on Monday, Wednesday, Friday and Sunday. The only airline offering direct flights is Allegiant Air.
Search flight deals

  • How far is Knoxville McGhee Tyson to Phoenix Sky Harbor Intl by plane?

    Knoxville McGhee Tyson and Phoenix Sky Harbor Intl are 1597.8 mi apart from one another. A reasonable flight in good conditions will take 4h 06m.

  • When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Phoenix Sky Harbor Intl Airport?

    Prices for flights from Knoxville McGhee Tyson Airport to Phoenix Sky Harbor Intl Airport were last updated today.

  • How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Phoenix Sky Harbor Intl Airport?

  • How old do you have to be to fly from Knoxville McGhee Tyson Airport to Phoenix Sky Harbor Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Phoenix Sky Harbor Intl Airport.

  • What documentation or ID do you need to fly to Phoenix Sky Harbor Intl Airport?

    The necessary travel and health documents for your Phoenix Sky Harbor Intl 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 Phoenix Sky Harbor Intl Airport?

  • What is the most popular airline from Knoxville to Phoenix Sky Harbor Intl Airport?

Best airlines flying from Knoxville to Phoenix Sky Harbor Intl Airport

Compare and see reviews for airlines that fly from Knoxville to Phoenix Sky Harbor Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $70Free CancellationRating
5.7
3,052 reviews
Search Frontier flights
Allegiant AirPriceFrom $109Free CancellationRating
7.2
709 reviews
Search Allegiant Air flights
DeltaPriceFrom $128Free CancellationRating
7.9
8,146 reviews
Search Delta flights
United AirlinesPriceFrom $170Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
American AirlinesPriceFrom $250Free CancellationRating
7.2
11,222 reviews
Search American Airlines flights

Traveling to a place near Phoenix?

Book flights to Phoenix if you plan to visit one of these locations
Scottsdale
Mesa
Tempe
Chandler
Glendale
Gilbert
Peoria
Casa Grande
Surprise
Goodyear
Buckeye
Payson
Apache Junction
Paradise Valley
Avondale
Wickenburg
Camp Verde
Guadalupe
Litchfield Park
Fountain Hills

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Knoxville to Phoenix for you.

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

momondo does allow users to show only those flights to Phoenix from Knoxville which offer a flexible booking policy as well as other useful filters and features.

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

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 Phoenix from Knoxville.

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

Yes. momondo can track prices for Knoxville to Phoenix 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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