Aspen Pitkin County Sardy Field in August 2025

63.4%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In August 2025, reporting carriers scheduled 659 domestic departures from Aspen Pitkin County Sardy Field (ASE). 63.4% left less than 15 minutes late and 62.1% reached their destination on time; 3.9% were cancelled.

Nationally that month, 76.8% of flights departed on time and 76.3% arrived on time, so ASE departures were 13.4 points below the national departure figure.

A year earlier, in August 2024, the airport had 648 departures with 71.8% leaving on time: a change of −8.4 points, with flights up 2%.

Flights arriving at ASE that month were on time 64.4% of the time (658 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, extreme weather 33%, air carrier 28% and late-arriving aircraft 23%.

On time 62.1%
Arrived 15+ minutes late 33.1%
Cancelled 3.9%
Diverted 0.9%

Every scheduled departure from ASE in August 2025, judged by arrival at the destination.

August 2025 against a year earlier, the airport's year and the nation

Measure	Aug 2025	Aug 2024	ASE, 12 months to Jul 2026	All reported flights, Aug 2025
Departed on time	63.4%	71.8%	66.5%	76.8%
Arrived on time	62.1%	68.7%	66.5%	76.3%
Cancelled	3.9%	0.0%	5.9%	1.1%
Average departure delay (late minutes only)	38.4 min	24.1 min	32.2 min	17.6 min
Scheduled departures a day	22	22	22	20,079
Scheduled departures	659	648	8,072	602,378

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	659	100%	62.1%	31.5 min	3.9%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ASE–DEN	Aspen to Denver	244	66.4%	22.3 min	3.7%
ASE–DFW	Aspen to Dallas/Fort Worth	124	54.0%	62.1 min	4.8%
ASE–LAX	Aspen to Los Angeles	94	59.6%	27.1 min	4.3%
ASE–ORD	Aspen to Chicago	75	60.0%	23.5 min	4.0%
ASE–IAH	Aspen to Houston	49	53.1%	38.4 min	2.0%
ASE–SFO	Aspen to San Francisco	37	75.7%	20.8 min	0.0%
ASE–ATL	Aspen to Atlanta	31	71.0%	21.7 min	3.2%
ASE–AUS	Aspen to Austin	5	60.0%	-2.0 min	40.0%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), August 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2025	Minutes
Air carrier	27.8%	33.1%	6,467
Late-arriving aircraft	23.4%	40.5%	5,439
National Aviation System	15.5%	19.2%	3,604
Extreme weather	33.4%	7.0%	7,768
Security	0.0%	0.1%	0

23,278 delay minutes on 218 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left ASE on time in August 2025?

63.4% of 659 scheduled domestic departures left less than 15 minutes late, and 62.1% reached their destination on time. The national figures that month were 76.8% and 76.3%.

How does that compare with a year earlier?

In August 2024, 71.8% of 648 departures left on time and 0.0% were cancelled, against 63.4% and 3.9% in August 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for ASE · methodology · corrections.