Aspen Pitkin County Sardy Field in April 2025

66.1%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 April 2025, reporting carriers scheduled 502 domestic departures from Aspen Pitkin County Sardy Field (ASE). 66.1% left less than 15 minutes late and 60.6% reached their destination on time; 6.2% were cancelled.

Nationally that month, 80.6% of flights departed on time and 79.5% arrived on time, so ASE departures were 14.5 points below the national departure figure.

A year earlier, in April 2024, the airport had 489 departures with 72.0% leaving on time: a change of −5.9 points, with flights up 3%.

Flights arriving at ASE that month were on time 70.7% of the time (498 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 33%, air carrier 28% and extreme weather 22%.

On time 60.6%
Arrived 15+ minutes late 33.1%
Cancelled 6.2%
Diverted 0.2%

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

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

Measure	Apr 2025	Apr 2024	ASE, 12 months to Jul 2026	All reported flights, Apr 2025
Departed on time	66.1%	72.0%	66.5%	80.6%
Arrived on time	60.6%	68.7%	66.5%	79.5%
Cancelled	6.2%	6.7%	5.9%	0.8%
Average departure delay (late minutes only)	24.4 min	24.0 min	32.2 min	14.1 min
Scheduled departures a day	17	16	22	19,465
Scheduled departures	502	489	8,072	583,950

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	502	100%	60.6%	17.1 min	6.2%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ASE–DEN	Aspen to Denver	250	61.6%	19.3 min	4.8%
ASE–LAX	Aspen to Los Angeles	74	78.4%	-2.5 min	5.4%
ASE–ORD	Aspen to Chicago	53	56.6%	17.3 min	9.4%
ASE–ATL	Aspen to Atlanta	43	46.5%	23.2 min	4.7%
ASE–DFW	Aspen to Dallas/Fort Worth	42	59.5%	16.6 min	9.5%
ASE–IAH	Aspen to Houston	18	11.1%	63.0 min	0.0%
ASE–SFO	Aspen to San Francisco	16	81.3%	-6.2 min	12.5%
ASE–AUS	Aspen to Austin	3	33.3%	87.5 min	33.3%
ASE–PHX	Aspen to Phoenix	3	33.3%	5.0 min	33.3%

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), April 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2025	Minutes
Air carrier	28.2%	32.7%	3,450
Late-arriving aircraft	11.1%	39.4%	1,364
National Aviation System	32.7%	22.2%	4,001
Extreme weather	22.2%	5.5%	2,716
Security	5.8%	0.2%	710

12,241 delay minutes on 166 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 April 2025?

66.1% of 502 scheduled domestic departures left less than 15 minutes late, and 60.6% reached their destination on time. The national figures that month were 80.6% and 79.5%.

How does that compare with a year earlier?

In April 2024, 72.0% of 489 departures left on time and 6.7% were cancelled, against 66.1% and 6.2% in April 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for April 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.