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

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

Historically, 82.2% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 3,059 flights.

HISTORICAL ROUTE SIGNALLower disruption
82.2%arrived on time
10.9%30+ min late
0.7%cancelled
3,059scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.0%all scheduled flights
120+ minutes late1.7%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+5.2 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 morning88089.7%5.7%0.8%
Late morning41187.8%8.0%0.7%
Afternoon1,12679.0%12.3%0.8%
Evening62774.0%17.1%0.2%

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
Monday45980.6%11.5%1.3%
Tuesday44683.9%9.6%0.2%
Wednesday42882.9%11.2%0.7%
Thursday46683.3%11.2%0.2%
Friday46181.6%10.2%0.9%
Saturday35283.2%10.5%0.6%
Sunday44780.1%11.6%0.7%

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
Southwest Airlines1,60881.2%10.8%0.4%
American Airlines1,31583.0%11.2%1.0%
SkyWest Airlines9184.6%9.9%1.1%
Envoy Air4588.9%4.4%0.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202526381.4%12.9%0.8%
August 202523784.0%11.8%0.0%
September 202522783.7%10.1%2.2%
October 202525876.7%12.0%0.0%
November 202527271.7%17.6%2.6%
December 202528280.1%10.3%0.0%
January 202626184.7%10.0%0.8%
February 202624087.5%7.5%0.0%
March 202628985.1%10.0%0.3%
April 202625286.9%7.9%0.0%
May 202625487.8%6.7%0.0%
June 202622477.2%12.9%1.3%

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.

Airline37.9%
Late aircraft45.7%
National airspace15.4%
Weather0.7%
Security0.2%
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.