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

Washington, DC (IAD) to Phoenix, AZ (PHX) flight delay odds

79.1% of 1,097 official scheduled IAD-to-PHX flights arrived on time; 12.0% arrived at least 30 minutes late and 0.8% 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
79.1%arrived on time
12.0%30+ min late
0.8%cancelled
1,097scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.6%all scheduled flights
120+ minutes late2.6%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+2.4 mincompleted flights

Which departure time was most reliable for IAD to PHX?

Among qualifying IAD-to-PHX departure window results, Early morning had the highest on-time rate: 94.3% of 193 flights. Evening was lowest at 71.1% across 488 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning19394.3%2.1%1.0%
Afternoon40180.8%9.0%0.7%
Evening48871.1%18.9%0.8%

Which weekday was most reliable for IAD to PHX?

Among qualifying IAD-to-PHX weekday results, Saturday had the highest on-time rate: 83.6% of 152 flights. Wednesday was lowest at 73.7% across 152 flights.

DayFlightsOn time30+ minCancelled
Monday16177.6%11.8%1.2%
Tuesday15383.0%11.1%1.3%
Wednesday15273.7%16.4%0.0%
Thursday15979.9%9.4%0.6%
Friday16078.1%14.4%0.0%
Saturday15283.6%6.6%0.0%
Sunday16078.1%14.4%2.5%

Which airline was most reliable for IAD to PHX?

Among qualifying IAD-to-PHX airline results, United Airlines had the highest on-time rate: 84.2% of 760 flights. Southwest Airlines was lowest at 67.7% across 337 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines76084.2%9.6%0.8%
Southwest Airlines33767.7%17.5%0.9%

Which month was most reliable for IAD to PHX?

Among qualifying IAD-to-PHX month results, April 2026 had the highest on-time rate: 89.0% of 91 flights. July 2025 was lowest at 57.6% across 92 flights.

MonthFlightsOn time30+ minCancelled
July 20259257.6%28.3%2.2%
August 20258883.0%10.2%0.0%
September 20258774.7%9.2%0.0%
October 20259775.3%10.3%0.0%
November 202510973.4%14.7%1.8%
December 202510882.4%8.3%0.0%
January 20269885.7%5.1%4.1%
February 20268184.0%8.6%0.0%
March 202611782.9%13.7%0.9%
April 20269189.0%9.9%0.0%
May 20269684.4%10.4%0.0%
June 20263372.7%21.2%0.0%

What drove IAD to PHX delay minutes?

Late aircraft was the largest recorded IAD-to-PHX delay category, accounting for 42.8% of 13,800 BTS-attributed delay minutes during July 2025–June 2026.

Airline23.9%
Late aircraft42.8%
National airspace28.1%
Weather5.1%
Security0.0%
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.