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

Dallas, TX (DAL) to St. Louis, MO (STL) flight delay odds

75.6% of 1,922 official scheduled DAL-to-STL flights arrived on time; 14.7% arrived at least 30 minutes late and 1.3% 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
75.6%arrived on time
14.7%30+ min late
1.3%cancelled
1,922scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.8%all scheduled flights
120+ minutes late2.4%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+8.5 mincompleted flights

Which departure time was most reliable for DAL to STL?

Among qualifying DAL-to-STL departure window results, Early morning had the highest on-time rate: 89.2% of 453 flights. Night was lowest at 51.0% across 149 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning45389.2%4.2%1.1%
Late morning35881.0%11.5%1.1%
Afternoon41175.2%14.6%1.5%
Evening55167.9%20.0%1.3%
Night14951.0%34.9%2.0%

Which weekday was most reliable for DAL to STL?

Among qualifying DAL-to-STL weekday results, Tuesday had the highest on-time rate: 86.1% of 281 flights. Sunday was lowest at 69.2% across 286 flights.

DayFlightsOn time30+ minCancelled
Monday29269.9%16.4%2.4%
Tuesday28186.1%7.1%0.4%
Wednesday27382.8%11.0%0.0%
Thursday28972.3%17.3%0.7%
Friday28773.5%17.1%1.0%
Saturday21476.2%17.3%0.9%
Sunday28669.2%16.8%3.5%

Which airline was most reliable for DAL to STL?

Only Southwest Airlines met the DAL-to-STL airline threshold: 75.6% of 1,922 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,92275.6%14.7%1.3%

Which month was most reliable for DAL to STL?

Among qualifying DAL-to-STL month results, December 2025 had the highest on-time rate: 89.6% of 154 flights. June 2026 was lowest at 53.8% across 169 flights.

MonthFlightsOn time30+ minCancelled
July 202516175.2%17.4%0.0%
August 202517275.6%10.5%1.7%
September 202517286.6%8.7%0.0%
October 202515678.8%10.9%1.3%
November 202515078.7%14.0%2.0%
December 202515489.6%5.2%0.6%
January 202614778.2%9.5%5.4%
February 202614987.2%7.4%0.0%
March 202616668.7%19.3%1.2%
April 202615972.3%18.2%1.3%
May 202616765.3%21.6%1.8%
June 202616953.8%31.4%0.6%

What drove DAL to STL delay minutes?

Late aircraft was the largest recorded DAL-to-STL delay category, accounting for 61.9% of 26,737 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.2%
Late aircraft61.9%
National airspace8.5%
Weather3.3%
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.