Aspen Pitkin County Sardy Field in December 2025

58.2%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 December 2025, reporting carriers scheduled 803 domestic departures from Aspen Pitkin County Sardy Field (ASE). 58.2% left less than 15 minutes late and 59.8% reached their destination on time; 4.0% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so ASE departures were 13.8 points below the national departure figure.

A year earlier, in December 2024, the airport had 765 departures with 56.3% leaving on time: a change of +1.9 points, with flights up 5%.

Flights arriving at ASE that month were on time 55.6% of the time (807 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 34%, extreme weather 30% and late-arriving aircraft 20%.

On time 59.8%
Arrived 15+ minutes late 36.2%
Cancelled 4.0%
Diverted 0.0%

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

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

Measure	Dec 2025	Dec 2024	ASE, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	58.2%	56.3%	66.5%	72.0%
Arrived on time	59.8%	57.9%	66.5%	71.9%
Cancelled	4.0%	8.9%	5.9%	1.5%
Average departure delay (late minutes only)	46.7 min	49.8 min	32.2 min	21.2 min
Scheduled departures a day	27	26	22	19,410
Scheduled departures	803	765	8,072	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	803	100%	59.8%	34.0 min	4.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ASE–DEN	Aspen to Denver	269	65.8%	22.6 min	5.2%
ASE–LAX	Aspen to Los Angeles	135	57.8%	33.6 min	5.2%
ASE–DFW	Aspen to Dallas/Fort Worth	114	61.4%	32.4 min	2.6%
ASE–ORD	Aspen to Chicago	112	49.1%	49.0 min	0.9%
ASE–IAH	Aspen to Houston	70	65.7%	30.0 min	4.3%
ASE–ATL	Aspen to Atlanta	43	62.8%	40.1 min	2.3%
ASE–SFO	Aspen to San Francisco	28	46.4%	47.7 min	3.6%
ASE–PHX	Aspen to Phoenix	14	57.1%	31.2 min	7.1%
ASE–AUS	Aspen to Austin	12	41.7%	117.2 min	0.0%
ASE–CLT	Aspen to Charlotte	6	16.7%	63.6 min	16.7%

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), December 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2025	Minutes
Air carrier	16.0%	33.3%	5,373
Late-arriving aircraft	20.1%	41.1%	6,761
National Aviation System	33.5%	19.1%	11,236
Extreme weather	29.9%	6.4%	10,046
Security	0.5%	0.2%	170

33,586 delay minutes on 291 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 December 2025?

58.2% of 803 scheduled domestic departures left less than 15 minutes late, and 59.8% reached their destination on time. The national figures that month were 72.0% and 71.9%.

How does that compare with a year earlier?

In December 2024, 56.3% of 765 departures left on time and 8.9% were cancelled, against 58.2% and 4.0% in December 2025.

Provenance

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