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

Aspen, CO (ASE) to San Francisco, CA (SFO) flight delay odds

Historically, 61.1% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 375 flights.

HISTORICAL ROUTE SIGNALHigher disruption
61.1%arrived on time
26.4%30+ min late
6.1%cancelled
375scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late18.1%all scheduled flights
120+ minutes late8.0%all scheduled flights
Diverted0.5%did not reach as scheduled
Average arrival+22.8 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 morning8674.4%18.6%1.2%
Late morning9654.2%34.4%3.1%
Afternoon11761.5%23.1%9.4%
Evening7653.9%30.3%10.5%

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
Monday5156.9%31.4%5.9%
Tuesday4776.6%17.0%4.3%
Wednesday5074.0%16.0%6.0%
Thursday5259.6%30.8%1.9%
Friday5451.9%29.6%13.0%
Saturday6259.7%29.0%8.1%
Sunday5952.5%28.8%3.4%

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
SkyWest Airlines37561.1%26.4%6.1%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 20253959.0%28.2%5.1%
August 20253775.7%18.9%0.0%
September 20252491.7%4.2%0.0%
December 20252846.4%50.0%3.6%
January 20266271.0%16.1%9.7%
February 20267251.4%31.9%11.1%
March 20266175.4%14.8%6.6%
April 20261241.7%16.7%16.7%
May 20261050.0%40.0%0.0%
June 20263020.0%60.0%0.0%

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.

Airline23.4%
Late aircraft27.2%
National airspace41.1%
Weather8.3%
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.