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Cheap flights from Knoxville to Phoenix from $97

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 1/5. 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
10:00 am - 12:26 pm
TYS
-
PHX
4h 26mnonstop
Allegiant Air Logo
1:16 pm - 6:39 pm
PHX
-
TYS
3h 23mnonstop
$136Allegiant Air
Sun, Jan 25 - Thu, Jan 29
Allegiant Air Logo
8:30 am - 11:05 am
TYS
-
PHX
4h 35mnonstop
Allegiant Air Logo
11:54 am - 5:17 pm
PHX
-
TYS
3h 23mnonstop
$164Allegiant Air
Sun, Feb 22 - Thu, Feb 26
Allegiant Air Logo
10:00 am - 12:26 pm
TYS
-
PHX
4h 26mnonstop
Allegiant Air Logo
1:16 pm - 6:39 pm
PHX
-
TYS
3h 23mnonstop
$168Allegiant Air
Thu, Jan 15 - Thu, Jan 22
Allegiant Air Logo
8:30 am - 11:05 am
TYS
-
PHX
4h 35mnonstop
Allegiant Air Logo
11:54 am - 5:17 pm
PHX
-
TYS
3h 23mnonstop
$172Allegiant Air
Sun, Feb 22 - Thu, Feb 26
Allegiant Air Logo
10:00 am - 12:26 pm
TYS
-
PHX
4h 26mnonstop
Allegiant Air Logo
1:16 pm - 6:39 pm
PHX
-
TYS
3h 23mnonstop
$179Allegiant Air
Thu, Jan 22 - Thu, Jan 29
Frontier Logo
4:46 pm - 12:29 am
TYS
-
PHX
9h 43m1 stop
Frontier Logo
7:00 am - 3:28 pm
PHX
-
TYS
6h 28m1 stop
$182Frontier
Mon, Jan 5 - Thu, Jan 8
Multiple Airlines Logo
8:18 pm - 12:59 am
TYS
-
PHX
30h 41m1 stop
Multiple Airlines Logo
1:16 pm - 6:39 pm
PHX
-
TYS
3h 23mnonstop
$195Multiple Airlines
Thu, Jan 15 - Thu, Jan 22
Multiple Airlines Logo
1:39 pm - 3:22 pm
TYS
-
PHX
27h 43m2 stops
Multiple Airlines Logo
1:16 pm - 6:39 pm
PHX
-
TYS
3h 23mnonstop
$196Multiple Airlines
Sun, Jan 25 - Thu, Jan 29
Multiple Airlines Logo
10:00 am - 12:26 pm
TYS
-
PHX
4h 26mnonstop
Multiple Airlines Logo
5:10 pm - 7:23 pm
PHX
-
TYS
24h 13m1 stop
$197Multiple Airlines
Sun, Jan 11 - Wed, Jan 14
Multiple Airlines Logo
10:00 am - 12:26 pm
TYS
-
PHX
4h 26mnonstop
Multiple Airlines Logo
2:38 pm - 8:39 am
PHX
-
TYS
16h 01m2 stops
$205Multiple Airlines
Sun, Jan 11 - Wed, Jan 14

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
Jan 25
TYS10:00 amKnoxville McGhee Tyson
4h 26m
PHX12:26 pmPhoenix Sky Harbor Intl
Jan 29
PHX1:16 pmPhoenix Sky Harbor Intl
3h 23m
TYS6:39 pmKnoxville McGhee Tyson
$136
Find similar
Allegiant Air
Feb 22
TYS8:30 amKnoxville McGhee Tyson
4h 35m
PHX11:05 amPhoenix Sky Harbor Intl
Feb 26
PHX11:54 amPhoenix Sky Harbor Intl
3h 23m
TYS5:17 pmKnoxville McGhee Tyson
$164
Find similar
Allegiant Air
Feb 22
TYS8:30 amKnoxville McGhee Tyson
4h 35m
PHX11:05 amPhoenix Sky Harbor Intl
Feb 26
PHX11:54 amPhoenix Sky Harbor Intl
3h 23m
TYS5:17 pmKnoxville McGhee Tyson
$172
Find similar

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
Jan 5
TYS4:46 pmKnoxville McGhee Tyson
9h 43m
1 stop
PHX12:29 amPhoenix Sky Harbor Intl
Jan 8
PHX7:00 amPhoenix Sky Harbor Intl
6h 28m
1 stop
TYS3:28 pmKnoxville McGhee Tyson
$182
Find similar
Frontier
Jan 5
TYS4:46 pmKnoxville McGhee Tyson
9h 43m
1 stop
PHX12:29 amPhoenix Sky Harbor Intl
Jan 11
PHX7:00 amPhoenix Sky Harbor Intl
6h 28m
1 stop
TYS3:28 pmKnoxville McGhee Tyson
$217
Find similar
Frontier
Jan 30
TYS4:25 pmKnoxville McGhee Tyson
10h 15m
1 stop
PHX12:40 amPhoenix Sky Harbor Intl
Feb 2
PHX7:00 amPhoenix Sky Harbor Intl
6h 35m
1 stop
TYS3:35 pmKnoxville McGhee Tyson
$238
Find similar

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 December 21, 2025.
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 1/25

10:00 am-12:26 pm

Nonstop4h 26m

Phoenix Sky Harbor Intl

Thu 1/29

1:16 pm-6:39 pm

Nonstop3h 23m

$136

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Sun 2/22

8:30 am-11:05 am

Nonstop4h 35m

Phoenix Sky Harbor Intl

Thu 2/26

11:54 am-5:17 pm

Nonstop3h 23m

$164

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Thu 1/15

10:00 am-12:26 pm

Nonstop4h 26m

Phoenix Sky Harbor Intl

Thu 1/22

1:16 pm-6:39 pm

Nonstop3h 23m

$168

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Sun 2/22

8:30 am-11:05 am

Nonstop4h 35m

Phoenix Sky Harbor Intl

Thu 2/26

11:54 am-5:17 pm

Nonstop3h 23m

$172

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Thu 1/22

10:00 am-12:26 pm

Nonstop4h 26m

Phoenix Sky Harbor Intl

Thu 1/29

1:16 pm-6:39 pm

Nonstop3h 23m

$179

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Mon 1/5

4:46 pm-12:29 am

1 stop9h 43m

Phoenix Sky Harbor Intl

Thu 1/8

7:00 am-3:28 pm

1 stop6h 28m

$182

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Thu 1/15

8:18 pm-12:59 am

1 stop30h 41m

Phoenix Sky Harbor Intl

Thu 1/22

1:16 pm-6:39 pm

Nonstop3h 23m

$195

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Sun 1/25

1:39 pm-3:22 pm

2 stops27h 43m

Phoenix Sky Harbor Intl

Thu 1/29

1:16 pm-6:39 pm

Nonstop3h 23m

$196

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Sun 1/11

10:00 am-12:26 pm

Nonstop4h 26m

Phoenix Sky Harbor Intl

Wed 1/14

5:10 pm-7:23 pm

1 stop24h 13m

$197

KnoxvillePhoenix

TYS - PHX

TYSPHX

Knoxville McGhee Tyson

Sun 1/11

10:00 am-12:26 pm

Nonstop4h 26m

Phoenix Sky Harbor Intl

Wed 1/14

2:38 pm-8:39 am

2 stops16h 01m

$205

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 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 $198. 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 $364. 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 $232. 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 in the evening because they tend to be around $300. 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 $321 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 $141 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.

Can stopping save me money on Knoxville to Phoenix Sky Harbor Intl Airport flights?

No. A direct flight is the cheapest option for a flight between Knoxville to Phoenix Sky Harbor Intl Airport.

How have Knoxville to Phoenix Sky Harbor Intl Airport flight prices changed over time?

As of December 2025, prices for Knoxville to Phoenix Sky Harbor Intl Airport flights are approximately 43% 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

$104

Fastest flight time

4h 05m

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 $104. The best round-trip flight deal from Knoxville to Phoenix Sky Harbor Intl Airport found on momondo in the last 72 hours is $198.
The fastest flight from Knoxville to Phoenix Sky Harbor Intl Airport takes 4h 05m
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 05m.

  • 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
Allegiant AirPriceFrom $115Free CancellationRating
7.2
702 reviews
Search Allegiant Air flights
DeltaPriceFrom $128Free CancellationRating
7.9
8,021 reviews
Search Delta flights
United AirlinesPriceFrom $228Free CancellationRating
7.4
9,099 reviews
Search United Airlines flights
American AirlinesPriceFrom $252Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights

  • Allegiant Air Flights From Knoxville to Phoenix Sky Harbor Intl Airport

    Allegiant Air flight deals from Knoxville to Phoenix Sky Harbor Intl Airport start from $115 round-trip. Over the 1 Allegiant Air flight for this route in a normal week, average airfare is usually $238 round-trip - but some users have found much cheaper deals with momondo.

Traveling to a place near Phoenix?

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

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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