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

Phoenix, AZ (PHX) to Ontario, CA (ONT) flight delay odds

77.3% of 3,059 official scheduled PHX-to-ONT flights arrived on time; 13.8% arrived at least 30 minutes late and 0.5% 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
77.3%arrived on time
13.8%30+ min late
0.5%cancelled
3,059scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.5%all scheduled flights
120+ minutes late1.7%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+7.0 mincompleted flights

Which departure time was most reliable for PHX to ONT?

Among qualifying PHX-to-ONT departure window results, Early morning had the highest on-time rate: 92.7% of 437 flights. Night was lowest at 63.8% across 318 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning43792.7%2.7%0.5%
Late morning67985.0%9.6%0.7%
Afternoon81878.9%12.0%0.5%
Evening80766.3%21.2%0.4%
Night31863.8%23.9%0.6%

Which weekday was most reliable for PHX to ONT?

Among qualifying PHX-to-ONT weekday results, Tuesday had the highest on-time rate: 84.0% of 438 flights. Sunday was lowest at 72.2% across 446 flights.

DayFlightsOn time30+ minCancelled
Monday46777.7%13.9%0.6%
Tuesday43884.0%10.7%0.5%
Wednesday42978.8%12.1%0.2%
Thursday46678.5%12.9%0.0%
Friday46072.4%15.2%0.9%
Saturday35377.9%13.6%0.6%
Sunday44672.2%17.9%0.9%

Which airline was most reliable for PHX to ONT?

Among qualifying PHX-to-ONT airline results, Envoy Air had the highest on-time rate: 91.1% of 45 flights. Southwest Airlines was lowest at 74.3% across 1,608 flights.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,60874.3%14.7%0.2%
American Airlines1,31579.7%13.4%0.9%
SkyWest Airlines9190.1%6.6%1.1%
Envoy Air4591.1%6.7%0.0%

Which month was most reliable for PHX to ONT?

Among qualifying PHX-to-ONT month results, January 2026 had the highest on-time rate: 83.5% of 261 flights. June 2026 was lowest at 68.3% across 224 flights.

MonthFlightsOn time30+ minCancelled
July 202526377.6%14.4%0.4%
August 202523781.4%10.1%0.0%
September 202522776.2%13.2%1.3%
October 202525878.7%11.6%0.0%
November 202527373.6%16.8%2.6%
December 202528277.0%14.5%0.4%
January 202626183.5%11.1%0.8%
February 202624083.3%10.0%0.0%
March 202628879.5%13.2%0.0%
April 202625276.2%12.7%0.0%
May 202625471.7%18.9%0.0%
June 202622468.3%18.8%0.9%

What drove PHX to ONT delay minutes?

Late aircraft was the largest recorded PHX-to-ONT delay category, accounting for 59.7% of 37,797 BTS-attributed delay minutes during July 2025–June 2026.

Airline35.8%
Late aircraft59.7%
National airspace4.2%
Weather0.2%
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.