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

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

Historically, 77.1% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 2,284 flights.

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

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 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%

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
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%

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 Airlines1,60076.0%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%

Monthly trend

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

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 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.

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.