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

Denver, CO (DEN) to San Antonio, TX (SAT) flight delay odds

76.2% of 3,030 official scheduled DEN-to-SAT flights arrived on time; 14.6% arrived at least 30 minutes late and 0.2% 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
76.2%arrived on time
14.6%30+ min late
0.2%cancelled
3,030scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.2%all scheduled flights
120+ minutes late2.4%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+7.2 mincompleted flights

Which departure time was most reliable for DEN to SAT?

Among qualifying DEN-to-SAT departure window results, Early morning had the highest on-time rate: 88.5% of 339 flights. Evening was lowest at 63.0% across 868 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning33988.5%5.0%0.6%
Late morning62885.7%7.0%0.2%
Afternoon1,08878.3%13.7%0.0%
Evening86863.0%24.0%0.3%
Night10767.3%22.4%0.9%

Which weekday was most reliable for DEN to SAT?

Among qualifying DEN-to-SAT weekday results, Wednesday had the highest on-time rate: 83.2% of 392 flights. Friday was lowest at 72.2% across 461 flights.

DayFlightsOn time30+ minCancelled
Monday45375.9%15.0%0.2%
Tuesday40876.7%15.2%0.0%
Wednesday39283.2%11.0%0.3%
Thursday46772.4%16.3%0.6%
Friday46172.2%18.2%0.2%
Saturday41080.0%9.8%0.2%
Sunday43974.5%15.7%0.0%

Which airline was most reliable for DEN to SAT?

Among qualifying DEN-to-SAT airline results, United Airlines had the highest on-time rate: 81.7% of 1,205 flights. Southwest Airlines was lowest at 70.4% across 1,434 flights.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,43470.4%18.1%0.2%
United Airlines1,20581.7%11.2%0.2%
Frontier Airlines37280.9%11.8%0.3%
SkyWest Airlines1978.9%21.1%0.0%

Which month was most reliable for DEN to SAT?

Among qualifying DEN-to-SAT month results, November 2025 had the highest on-time rate: 87.2% of 243 flights. July 2025 was lowest at 57.6% across 278 flights.

MonthFlightsOn time30+ minCancelled
July 202527857.6%28.4%0.0%
August 202523974.1%15.9%0.8%
September 202522081.8%13.6%0.0%
October 202525283.3%7.5%0.0%
November 202524387.2%5.3%0.4%
December 202528275.9%13.1%0.4%
January 202622578.2%13.8%0.4%
February 202619385.0%8.3%0.0%
March 202629973.6%19.4%0.3%
April 202625084.4%9.2%0.4%
May 202626779.0%10.9%0.0%
June 202628261.7%24.5%0.0%

What drove DEN to SAT delay minutes?

Late aircraft was the largest recorded DEN-to-SAT delay category, accounting for 57.6% of 40,303 BTS-attributed delay minutes during July 2025–June 2026.

Airline28.2%
Late aircraft57.6%
National airspace12.3%
Weather1.9%
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.