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

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

Historically, 73.7% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 3,005 flights.

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

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

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%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

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%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 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%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

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 reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

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.