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

Phoenix, AZ (PHX) to St. Louis, MO (STL) flight delay odds

77.1% of 2,284 official scheduled PHX-to-STL flights arrived on time; 12.7% arrived at least 30 minutes late and 0.4% 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
77.1%arrived on time
12.7%30+ min late
0.4%cancelled
2,284scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.9%all scheduled flights
120+ minutes late1.9%all scheduled flights
Diverted0.7%did not reach as scheduled
Average arrival+6.7 mincompleted flights

Which departure time was most reliable for PHX to STL?

Among qualifying PHX-to-STL departure window results, Early morning had the highest on-time rate: 89.8% of 657 flights. Evening was lowest at 68.0% across 649 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning65789.8%4.0%0.2%
Late morning32682.8%7.4%0.3%
Afternoon63970.3%16.4%0.3%
Evening64968.0%20.3%0.6%

Which weekday was most reliable for PHX to STL?

Among qualifying PHX-to-STL weekday results, Wednesday had the highest on-time rate: 83.8% of 315 flights. Sunday was lowest at 71.8% across 354 flights.

DayFlightsOn time30+ minCancelled
Monday35172.9%16.8%0.9%
Tuesday32282.9%7.5%0.0%
Wednesday31583.8%9.5%0.0%
Thursday33774.8%13.9%0.3%
Friday35178.1%11.1%0.9%
Saturday25476.0%12.2%0.0%
Sunday35471.8%16.7%0.3%

Which airline was most reliable for PHX to STL?

Among qualifying PHX-to-STL airline results, Envoy Air had the highest on-time rate: 93.3% of 30 flights. Southwest Airlines was lowest at 76.0% across 1,600 flights.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,60076.0%12.8%0.2%
American Airlines54778.1%12.8%0.7%
SkyWest Airlines5485.2%11.1%0.0%
Frontier Airlines5381.1%13.2%1.9%
Envoy Air3093.3%3.3%0.0%

Which month was most reliable for PHX to STL?

Among qualifying PHX-to-STL month results, February 2026 had the highest on-time rate: 84.9% of 192 flights. June 2026 was lowest at 65.7% across 166 flights.

MonthFlightsOn time30+ minCancelled
July 202516676.5%12.7%0.6%
August 202516478.0%11.0%0.6%
September 202515981.8%9.4%1.3%
October 202519980.9%13.1%0.0%
November 202518974.6%12.7%0.5%
December 202520775.4%16.4%0.0%
January 202619982.9%8.0%1.0%
February 202619284.9%6.8%0.0%
March 202623473.1%14.5%0.0%
April 202620774.4%13.5%0.0%
May 202620276.7%13.9%0.0%
June 202616665.7%19.3%0.6%

What drove PHX to STL delay minutes?

Late aircraft was the largest recorded PHX-to-STL delay category, accounting for 49.2% of 26,956 BTS-attributed delay minutes during July 2025–June 2026.

Airline41.0%
Late aircraft49.2%
National airspace7.6%
Weather1.4%
Security0.9%
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.