BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
PHL→DEN

Philadelphia, PA (PHL) to Denver, CO (DEN) flight delay odds

73.7% of 3,005 official scheduled PHL-to-DEN flights arrived on time; 16.6% arrived at least 30 minutes late and 1.1% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
73.7%arrived on time
16.6%30+ min late
1.1%cancelled
3,005scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.4%all scheduled flights
120+ minutes late3.6%all scheduled flights
Diverted0.5%did not reach as scheduled
Average arrival+10.9 mincompleted flights

Which departure time was most reliable for PHL to DEN?

Among qualifying PHL-to-DEN departure window results, Early morning had the highest on-time rate: 84.4% of 993 flights. Evening was lowest at 56.0% across 727 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning99384.4%8.9%0.9%
Late morning54882.7%12.6%0.2%
Afternoon70469.7%17.5%0.6%
Evening72756.0%29.7%2.8%

Which weekday was most reliable for PHL to DEN?

Among qualifying PHL-to-DEN weekday results, Wednesday had the highest on-time rate: 77.7% of 394 flights. Sunday was lowest at 70.9% across 437 flights.

DayFlightsOn time30+ minCancelled
Monday45972.8%15.5%2.2%
Tuesday40175.6%15.2%0.2%
Wednesday39477.7%14.0%0.3%
Thursday45071.1%21.3%0.9%
Friday46472.4%16.4%0.9%
Saturday40076.8%14.0%0.2%
Sunday43770.9%19.0%3.0%

Which airline was most reliable for PHL to DEN?

Among qualifying PHL-to-DEN airline results, United Airlines had the highest on-time rate: 82.8% of 953 flights. Frontier Airlines was lowest at 67.2% across 296 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines95382.8%10.9%0.8%
Southwest Airlines87967.8%18.5%0.8%
American Airlines87772.1%18.4%1.6%
Frontier Airlines29667.2%23.6%1.7%

Which month was most reliable for PHL to DEN?

Among qualifying PHL-to-DEN month results, November 2025 had the highest on-time rate: 85.4% of 239 flights. December 2025 was lowest at 54.7% across 236 flights.

MonthFlightsOn time30+ minCancelled
July 202531765.9%24.3%2.5%
August 202530975.1%15.5%0.6%
September 202528383.4%11.3%0.4%
October 202524880.6%13.7%0.0%
November 202523985.4%7.5%0.4%
December 202523654.7%27.1%1.7%
January 202617770.1%16.4%4.0%
February 202617378.0%13.9%3.5%
March 202620674.3%17.0%1.5%
April 202622580.4%14.2%0.0%
May 202627676.4%12.0%0.0%
June 202631663.9%22.8%0.6%

What drove PHL to DEN delay minutes?

Airline was the largest recorded PHL-to-DEN delay category, accounting for 37.4% of 54,649 BTS-attributed delay minutes during July 2025–June 2026.

Airline37.4%
Late aircraft34.5%
National airspace22.8%
Weather5.3%
Security0.1%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.