$115 Cheap United flights Phoenix (PHX) to Knoxville (TYS)

View $115 flight on Sat, Aug 30, 2025Opens in a new window

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

$115 Cheap United flights Phoenix (PHX) to Knoxville (TYS)

Prices were available within the past 7 days and start at $115 for one-way flights and $224 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Aug 30 - Sun, Aug 31
PHX
Phoenix
TYS
Knoxville
$224 Roundtrip, found 21 hours ago
$224
Roundtrip
found 21 hours ago
Select United flight, departing Sat, Aug 30 from Phoenix to Knoxville, returning Sun, Aug 31, priced at $224 found 21 hours ago
United
Tue, Aug 12 - Wed, Aug 13
PHX
Phoenix
TYS
Knoxville
$246 Roundtrip, found 17 hours ago
$246
Roundtrip
found 17 hours ago
Select United flight, departing Tue, Aug 12 from Phoenix to Knoxville, returning Wed, Aug 13, priced at $246 found 17 hours ago
United
Wed, Oct 22 - Mon, Oct 27
PHX
Phoenix
TYS
Knoxville
$258 Roundtrip, found 6 days ago
$258
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 22 from Phoenix to Knoxville, returning Mon, Oct 27, priced at $258 found 6 days ago
United
Sat, Aug 30 - Sun, Aug 31
PHX
Phoenix
TYS
Knoxville
$260 Roundtrip, found 21 hours ago
$260
Roundtrip
found 21 hours ago
Select United flight, departing Sat, Aug 30 from Phoenix to Knoxville, returning Sun, Aug 31, priced at $260 found 21 hours ago
United
Sat, Aug 30 - Sun, Aug 31
PHX
Phoenix
TYS
Knoxville
$265 Roundtrip, found 21 hours ago
$265
Roundtrip
found 21 hours ago
Select United flight, departing Sat, Aug 30 from Phoenix to Knoxville, returning Sun, Aug 31, priced at $265 found 21 hours ago
United
Wed, Aug 27 - Sun, Aug 31
PHX
Phoenix
TYS
Knoxville
$268 Roundtrip, found 18 hours ago
$268
Roundtrip
found 18 hours ago
Select United flight, departing Wed, Aug 27 from Phoenix to Knoxville, returning Sun, Aug 31, priced at $268 found 18 hours ago
Flights from Phoenix (PHX) to Knoxville (TYS)
Origin airport
Sky Harbor Intl.
Destination airport
McGhee Tyson
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, United
Popular airline
American Airlines
Distance
1596 mi
Average flight time
6 hours 33 mins

Frequently asked questions

How much is a United Airlines flight from Sky Harbor Intl. Airport (PHX) to McGhee Tyson Airport (TYS)?
Landing cheap one-way United Airlines flights from PHX to TYS from $115 on Expedia is a cinch --- just filter by "Price (lowest to highest)." Or check out our affordable round-trip fares from $224 for your next exciting getaway.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from PHX to TYS with United Airlines?
January is one of the least expensive months to get away to Knoxville with United Airlines. You could also find fantastic deals on one-way and return tickets in December.
What is the cheapest time to book flights from Sky Harbor Intl. Airport (PHX) to McGhee Tyson Airport (TYS) with United Airlines?
Search for affordable United Airlines flights from Sky Harbor Intl. Airport (PHX) to McGhee Tyson Airport (TYS) one to three months prior to your departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and itinerary, the best day of the week to book a domestic flight is usually Sunday and the most expensive is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Sky Harbor Intl. Airport (PHX) to McGhee Tyson Airport (TYS)?
To figure out if there's a direct journey from PHX to TYS with United Airlines or other carriers, check the "Nonstop" filter when searching for tickets.
What is the earliest United Airlines flight from PHX to TYS?
Filter your results by "Morning" and "Early Morning" to browse the earliest departures from PHX to TYS. Setting off early means you're 20% less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Knoxville?
McGhee Tyson Airport (TYS) is the main Knoxville hub for United Airlines flights from Sky Harbor Intl. Airport (PHX).
Why fly with United Airlines from PHX to TYS?
A rewarding loyalty program and the chance to rack up points through United Mileage Plus are the start of the reasons to jet off from PHX to TYS with United Airlines. Plus, when you sign up to our One Key™ program, you can receive OneKeyCash™* on top of United Airlines's loyalty program earnings. You can put it toward your future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from Sky Harbor Intl. Airport (PHX) to McGhee Tyson Airport (TYS)?
It's generally possible to cancel or change your flight, although there may be a charge if you made your booking more than 24 hours ago. Prefer to keep your options open? Apply the "Changes included" and "No cancel fee" filters to find flights that won't charge you extra if you have to revise your plans. To modify your itinerary, head to "Trips," select your flight and click on "Manage Booking" for more information.

Explore a world of travel with Expedia

*Available to One Key members.