May is the cheapest month to fly this route, with average fares around $204 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $204 | $169 | Best | |
| June 2026 | $231 | $189 | ||
| July 2026 | $231 | $169 | ||
| August 2026 | $234 | $210 | Peak |
Departing on Wednesday offers the lowest average fares at $216. Sunday departures are the most expensive at $254, a difference of $38.
The best time to fly is May. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Philadelphia to Denver is May, with average round-trip fares around $204. The lowest fare found in May is $169.
Wednesday departures are the cheapest, averaging $216 round trip. The most expensive day is Sunday at $254.
Based on current pricing trends, booking for May travel offers the best value. Avoid August if possible, as fares average $234 compared to $204 in the cheapest month. June is a solid middle-ground option at $231.
Flying in May instead of August can save you approximately $30 per round trip. The cheapest month averages $204 while the most expensive averages $234.
Airlines, flight times, price calendar, and more for Philadelphia to Denver
View PHL → DEN Details