August is the cheapest month to fly this route, with average fares around $122 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $141 | $112 | Peak | |
| June 2026 | $125 | $112 | ||
| July 2026 | $127 | $112 | ||
| August 2026 | $122 | $112 | Best |
Departing on Wednesday offers the lowest average fares at $113. Sunday departures are the most expensive at $139, a difference of $26.
The best time to fly is August. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Denver to Phoenix is August, with average round-trip fares around $122. The lowest fare found in August is $112.
Wednesday departures are the cheapest, averaging $113 round trip. The most expensive day is Sunday at $139.
Based on current pricing trends, booking for August travel offers the best value. Avoid May if possible, as fares average $141 compared to $122 in the cheapest month. July is a solid middle-ground option at $127.
Flying in August instead of May can save you approximately $19 per round trip. The cheapest month averages $122 while the most expensive averages $141.
Airlines, flight times, price calendar, and more for Denver to Phoenix
View DEN → PHX Details