Cheap flights from Knoxville to Phoenix from $108

In general, August 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 $208. If you are unable to visit Phoenix Sky Harbor Intl Airport during the month of August, then departing from Knoxville during the month September is also very affordable. Most momondo users find prices during this month for around $209.

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 $404. These prices are subject to change though, so be sure to set up a Price Alert for flights 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 $247. 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 $266. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

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 $312 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 $211 on momondo.

You could potentially save up to 18% on your flight if you consider stops on a Knoxville to Phoenix Sky Harbor Intl Airport flight.

As of May 2026, prices for Knoxville to Phoenix Sky Harbor Intl Airport flights are approximately 14% more expensive when compared to flights at the same time last year.

Allegiant Air and Frontier are the most popular carriers operating from Knoxville McGhee Tyson to Phoenix Sky Harbor Intl

American Airlines, Allegiant Air and Delta are the top three most popular airlines that fly to Phoenix Sky Harbor Intl Airport from Knoxville according to our data. American Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Phoenix Sky Harbor Intl Airport. Keep in mind that there are 5 different airlines that fly to Phoenix Sky Harbor Intl Airport on a routine basis, so you have a few additional options to choose from.

Dallas (DFW) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Dallas (DFW) offer the lowest average round-trip price of $549.

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 6h 36m.

Dallas (DFW) has the shortest average layover time for this route: 0h 55m.