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

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

74.9% of 5,949 official scheduled DEN-to-SAN flights arrived on time; 15.9% arrived at least 30 minutes late and 0.7% 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
74.9%arrived on time
15.9%30+ min late
0.7%cancelled
5,949scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.3%all scheduled flights
120+ minutes late2.2%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+6.6 mincompleted flights

Which departure time was most reliable for DEN to SAN?

Among qualifying DEN-to-SAN departure window results, Early morning had the highest on-time rate: 89.4% of 1,343 flights. Evening was lowest at 60.7% across 1,474 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,34389.4%5.2%0.5%
Late morning90378.3%12.0%0.2%
Afternoon1,58877.1%14.6%0.5%
Evening1,47460.7%26.5%1.0%
Night64166.9%22.8%1.1%

Which weekday was most reliable for DEN to SAN?

Among qualifying DEN-to-SAN weekday results, Saturday had the highest on-time rate: 80.5% of 744 flights. Thursday was lowest at 68.2% across 893 flights.

DayFlightsOn time30+ minCancelled
Monday89675.4%16.0%0.2%
Tuesday79780.2%12.7%0.4%
Wednesday81276.8%14.9%1.1%
Thursday89368.2%19.4%0.9%
Friday90873.3%19.4%0.6%
Saturday74480.5%9.9%0.4%
Sunday89971.5%17.6%1.0%

Which airline was most reliable for DEN to SAN?

Among qualifying DEN-to-SAN airline results, Alaska Airlines had the highest on-time rate: 81.8% of 433 flights. Southwest Airlines was lowest at 68.9% across 2,389 flights.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines2,38968.9%19.8%0.6%
United Airlines2,08179.2%13.6%0.5%
Frontier Airlines70378.8%14.8%0.9%
Alaska Airlines43381.8%9.7%1.2%
SkyWest Airlines34374.3%13.1%0.9%

Which month was most reliable for DEN to SAN?

Among qualifying DEN-to-SAN month results, February 2026 had the highest on-time rate: 84.1% of 460 flights. July 2025 was lowest at 64.4% across 458 flights.

MonthFlightsOn time30+ minCancelled
July 202545864.4%26.4%0.9%
August 202543669.3%21.1%0.5%
September 202541172.0%18.2%0.7%
October 202553272.6%11.8%0.2%
November 202552977.5%12.5%2.5%
December 202553869.9%19.3%0.6%
January 202650080.8%11.2%0.2%
February 202646084.1%10.9%0.0%
March 202653781.4%12.8%1.5%
April 202650883.9%9.4%0.2%
May 202651577.1%14.2%0.2%
June 202652564.8%24.6%0.4%

What drove DEN to SAN delay minutes?

Late aircraft was the largest recorded DEN-to-SAN delay category, accounting for 43.5% of 80,731 BTS-attributed delay minutes during July 2025–June 2026.

Airline30.0%
Late aircraft43.5%
National airspace25.2%
Weather1.2%
Security0.0%
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.