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

San Diego, CA (SAN) to Denver, CO (DEN) flight delay odds

78.3% of 5,947 official scheduled SAN-to-DEN flights arrived on time; 13.3% arrived at least 30 minutes late and 0.9% 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
78.3%arrived on time
13.3%30+ min late
0.9%cancelled
5,947scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.6%all scheduled flights
120+ minutes late2.3%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+3.8 mincompleted flights

Which departure time was most reliable for SAN to DEN?

Among qualifying SAN-to-DEN departure window results, Early morning had the highest on-time rate: 88.3% of 1,797 flights. Afternoon was lowest at 66.4% across 1,944 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,79788.3%6.6%0.7%
Late morning1,06887.1%7.3%0.5%
Afternoon1,94466.4%21.1%0.7%
Evening1,05073.8%16.8%1.8%
Night8883.0%8.0%4.5%

Which weekday was most reliable for SAN to DEN?

Among qualifying SAN-to-DEN weekday results, Saturday had the highest on-time rate: 86.0% of 744 flights. Friday was lowest at 71.8% across 907 flights.

DayFlightsOn time30+ minCancelled
Monday90277.9%13.9%1.0%
Tuesday80182.0%11.2%0.1%
Wednesday80380.9%12.0%1.0%
Thursday89372.7%16.7%1.3%
Friday90771.8%16.0%1.0%
Saturday74486.0%7.7%0.8%
Sunday89778.5%14.2%0.9%

Which airline was most reliable for SAN to DEN?

Among qualifying SAN-to-DEN airline results, United Airlines had the highest on-time rate: 84.4% of 2,081 flights. Southwest Airlines was lowest at 71.5% across 2,387 flights.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines2,38771.5%17.7%0.8%
United Airlines2,08184.4%9.2%0.8%
Frontier Airlines70480.4%12.8%1.3%
Alaska Airlines43382.4%10.2%1.2%
SkyWest Airlines34278.1%12.3%1.5%

Which month was most reliable for SAN to DEN?

Among qualifying SAN-to-DEN month results, April 2026 had the highest on-time rate: 86.0% of 507 flights. July 2025 was lowest at 67.0% across 458 flights.

MonthFlightsOn time30+ minCancelled
July 202545867.0%19.7%0.4%
August 202543671.8%17.9%0.7%
September 202541177.4%14.8%0.7%
October 202553180.2%11.3%0.6%
November 202552981.1%10.2%2.6%
December 202553771.5%17.9%1.3%
January 202650085.6%9.0%1.2%
February 202646083.7%9.6%0.2%
March 202653880.9%12.8%1.3%
April 202650786.0%9.1%0.4%
May 202651581.9%11.1%0.4%
June 202652570.7%17.0%0.6%

What drove SAN to DEN delay minutes?

Late aircraft was the largest recorded SAN-to-DEN delay category, accounting for 47.8% of 73,709 BTS-attributed delay minutes during July 2025–June 2026.

Airline20.5%
Late aircraft47.8%
National airspace29.6%
Weather1.9%
Security0.2%
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.