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

Houston, TX (IAH) to Aspen, CO (ASE) flight delay odds

Historically, 69.6% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 624 flights.

HISTORICAL ROUTE SIGNALVariable
69.6%arrived on time
18.3%30+ min late
3.2%cancelled
624scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late11.9%all scheduled flights
120+ minutes late5.8%all scheduled flights
Diverted5.3%did not reach as scheduled
Average arrival+8.5 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
Late morning23073.0%18.3%0.9%
Afternoon21459.8%24.3%2.8%
Evening14874.3%11.5%8.1%

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
Monday8865.9%20.5%1.1%
Tuesday7883.3%15.4%1.3%
Wednesday8380.7%9.6%3.6%
Thursday9176.9%14.3%1.1%
Friday9464.9%21.3%4.3%
Saturday9761.9%25.8%4.1%
Sunday9357.0%19.4%6.5%

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 Airlines62469.6%18.3%3.2%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 20256152.5%21.3%4.9%
August 20254858.3%31.2%2.1%
September 20253083.3%16.7%0.0%
October 20252190.5%4.8%0.0%
December 20257064.3%25.7%1.4%
January 20269472.3%14.9%4.3%
February 20268066.2%22.5%6.2%
March 202611578.3%9.6%4.3%
April 20262483.3%8.3%0.0%
May 20262185.7%4.8%0.0%
June 20266060.0%26.7%1.7%

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.

Airline44.6%
Late aircraft15.7%
National airspace30.9%
Weather8.8%
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.