Cheap flights from Phoenix Sky Harbor Intl Airport to Denver from $56

The cheapest month to fly to Denver from Phoenix Sky Harbor Intl Airport is in February. Flight prices, which tend to average around $149, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in February, then you should wait until October to fly from Phoenix Sky Harbor Intl Airport, when ticket prices are also cheap, with an average price of $151.

The cheapest day to depart on your flight to Denver is on a Thursday when prices can be found for as low as $237. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Sunday, with ticket prices averaging around $323.

The cheapest time of day to fly to Denver is in the evening when flights can be purchased for as low as $207. Flights at noon are often more expensive with an average ticket price of $412.

Fly from Phoenix Sky Harbor Intl to Denver Intl for the best Phoenix Sky Harbor Intl - Denver Intl flight prices

You are more likely to see cheaper flights to Denver from Phoenix Sky Harbor Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $179 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Phoenix Sky Harbor Intl Airport for as low as $133 on momondo.

Southwest and Delta are the most popular carriers operating from Phoenix Sky Harbor Intl to Denver Intl

Frontier, Southwest and United Airlines are the top three most popular airlines that fly to Denver from Phoenix Sky Harbor Intl Airport according to our data. Frontier is the first choice among our users, with 69% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 5 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

Historically, on average around 18% of flights between Phoenix and Denver have experienced a delay on any given week. The average delay length over the past 12 months has been 126 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, Frontier have had the least number of delays on this route over the last 12 months; with about 13% of their flights experiencing any sort of delay.

36 flights are operational daily from Phoenix Sky Harbor Intl Airport to Denver as of May 2026. The most popular departure time for this route is 6:00PM, with 47% of flights per day taking off in the afternoon.

The number of flights available between Phoenix Sky Harbor Intl Airport and Denver is 258 per week as of May 2026. The most frequent departure day is Thu, with 19% of weekly flights leaving on this day.