Airport · ASE · Aspen, Colorado

Aspen, CO

Aspen, CO posts bottom-quartile on-time performance among the 382 tracked U.S. airports, as a mid-size U.S. airport. According to the U.S. DOT Bureau of Transportation Statistics, drawn from 78,805 flights (2020–2025); its biggest delay driver is carrier.

Compiled by PlainFlights Editorial, Flight Performance Editorial Team

Data updated 2026-06-13

73.5%
On-time: Top 98%
on-time, US airports: 97 min
Delay when late: 3.88%
Cancelled

Key Performance Metrics

Total Flights

78,805

Best Month

Nov 92.5%

Worst Month

Dec 82%

Delayed

20,917

Cancelled

3,058

60-65%

1
65-70%

4
70-75%

9
75-80%

48
80-85%

192
85-90%

116
90-95%

12

What this shows ASE is marked in the 70-75% band.

Delay Cause Breakdown

Top delay cause: Carrier. Total delay minutes: 1,053,590.

Late Aircraft 28.5% (299,908 min)

Carrier 34.7% (365,436 min)

NAS (National Aviation System) 15.0% (158,144 min)

Weather 21.4% (225,470 min)

Security 0.4% (4,632 min)

Seasonal Performance Patterns

Monthly averages across all years of data. Best month: November (92.5% on-time). Most delays: December (82% on-time).

Month	Avg Flights	Avg Delayed	Avg Cancelled	On-Time %
December	1,402	517	74	82%
November	550	85	16	92.5%
October	701	115	12	91.6%
September	897	164	8	90.8%
August	1,144	288	13	87.5%
July	1,180	306	18	87.4%
June	1,046	269	25	87%
May	252	47	9	90.8%
April	629	121	32	89.8%
March	1,889	516	116	85.9%
February	1,672	524	95	84.4%
January	1,774	536	91	85.2%

Year-Over-Year Performance

Annual flight volume and on-time trends at ASE.

Year	Flights	Delayed	Cancelled	On-Time %
2025	15,369	2,432	443	84.2%
2024	15,779	2,260	516	85.7%
2023	13,182	1,740	507	86.8%
2022	12,929	1,742	572	86.5%
2021	11,805	1,419	440	88%
2020	9,741	863	580	91.1%

Cancellation & Diversion Analysis

Flight disruption statistics for Aspen, CO.

Cancellation Rate

3.88%

3,058 of 78,805 flights

Diversion Rate

0.25%

197 of 78,805 flights

Delay Rate

26.5%

20,917 of 78,805 flights

Monthly Performance

Recent 24 months of flight data.

Period	Flights	Dep Delayed	Arr Delayed	Cancelled	Diverted
Dec 2025	1,610	304	307	32	0
Nov 2025	655	36	39	12	1
Oct 2025	893	100	86	0	5
Sep 2025	1,099	83	96	2	1
Aug 2025	1,317	215	189	26	6
Jul 2025	1,418	248	205	54	4
Jun 2025	1,199	241	197	41	5
May 2025	107	12	6	0	0
Apr 2025	1,000	139	102	31	1
Mar 2025	2,163	376	316	104	7
Feb 2025	1,860	329	327	87	4
Jan 2025	2,048	349	327	54	1
Dec 2024	1,536	266	266	68	3
Nov 2024	820	84	79	44	3
Oct 2024	995	75	67	3	2
Sep 2024	1,096	137	98	3	9
Aug 2024	1,295	183	166	0	7
Jul 2024	1,422	153	166	10	7
Jun 2024	1,392	154	150	52	7
May 2024	414	65	55	6	1
Apr 2024	973	104	112	33	10
Mar 2024	2,084	384	316	112	12
Feb 2024	1,813	342	309	78	3
Jan 2024	1,939	313	298	107	1

Top Routes from ASE

Busiest routes to and from Aspen, CO.

Route	Flights	On-Time	Distance
DEN (Denver) → ASE (Aspen)	14,210	74.9%	125 mi
ASE (Aspen) → DEN (Denver)	14,206	74.8%	125 mi
DFW (Dallas/Fort Worth) → ASE (Aspen)	5,988	74.8%	701 mi
ASE (Aspen) → DFW (Dallas/Fort Worth)	5,987	69.6%	701 mi
LAX (Los Angeles) → ASE (Aspen)	5,536	74%	737 mi
ASE (Aspen) → LAX (Los Angeles)	5,510	75.1%	737 mi
ORD (Chicago) → ASE (Aspen)	5,190	70.7%	1,013 mi
ASE (Aspen) → ORD (Chicago)	5,187	71.7%	1,013 mi
ASE (Aspen) → IAH (Houston)	3,122	69%	913 mi
IAH (Houston) → ASE (Aspen)	3,118	68.7%	913 mi
SFO (San Francisco) → ASE (Aspen)	1,523	72.9%	848 mi
ASE (Aspen) → SFO (San Francisco)	1,521	72.1%	848 mi
ASE (Aspen) → ATL (Atlanta)	1,199	63.6%	1,304 mi
ATL (Atlanta) → ASE (Aspen)	1,199	72.1%	1,304 mi

Airports With a Similar On-Time Rate

Other U.S. airports nationwide whose on-time rate is closest to Aspen, CO's 73.5%.

Sanford, FL

74.1% on-time 113,898 flights

Columbus, OH

74.3% on-time 12,681 flights

Stockton, CA

72.6% on-time 7,206 flights

Barrow, AK

74.4% on-time 4,483 flights

Ponce, PR

74.5% on-time 8,079 flights

Concord, NC

72.4% on-time 10,857 flights

Other Airports in Colorado

Compare performance with other Colorado airports.

DEN 78.9%

Denver, CO

Denver · 3,293,040 flights

COS 80.4%

Colorado Springs, CO

Colorado Springs · 134,711 flights

GJT 85.1%

Grand Junction, CO

Grand Junction · 47,063 flights

DRO 83.4%

Durango, CO

Durango · 42,722 flights

EGE 78%

Eagle, CO

Eagle · 37,271 flights

MTJ 81.3%

Montrose/Delta, CO

Montrose/Delta · 32,233 flights

HDN 79.7%

Hayden, CO

Hayden · 27,069 flights

GUC 82.9%

Gunnison, CO

Gunnison · 9,819 flights

Keep exploring

More flight data around Aspen, CO.

Colorado flight data

Statewide on-time and delay aggregates, plus every reporting airport in Colorado.

View CO data →

Airport rankings

See where ASE sits among U.S. airports on on-time rate and average delay.

Best on-time airports →

Compare airports

Put ASE head-to-head with another airport on delays and reliability.

Open comparison tool →

What the Data Says About ASE

Aspen, CO in Aspen, Colorado handled 78,805 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 73.5% on-time departure rate. Of those flights, 20,917 experienced delays, 3,058 were cancelled, and 197 were diverted. The cancellation rate works out to 3.88%, the diversion rate to 0.25%, and the average delay when departures run late is 97.1 minutes. These figures are the baseline for comparing ASE against other airports in the same state and nationally.

Breaking down what drives delays at ASE, Carrier leads the pack. Carrier accounts for 34.7% of total delay minutes, followed by Late Aircraft at 28.5% and Weather at 21.4%. Weather contributes 21.4% of delay minutes at this airport, while security holds the smallest share at 0.4%. Travelers often overestimate the weather share; the BTS categorization shows late-arriving aircraft and carrier operations as the larger contributors.

Seasonally, November runs the cleanest at ASE with a 92.5% on-time rate, while December is the roughest at 82% - a 11-point swing between best and worst month. Volume peaks in March, when average flights hit 1,889. The busiest route connecting ASE is to DEN (Denver), with 14,210 flights at a 74.9% on-time rate. Combine these numbers - 73.5% on-time, 97.1-minute average delay, 3.88% cancellation rate, and you have a concrete picture of departure reliability at Aspen, CO.

Frequently Asked Questions

What is the on-time performance rate at Aspen, CO (ASE)? ▼

Aspen, CO has an overall on-time departure rate of 73.5%. Out of 78,805 total flights tracked, 20,917 experienced delays and 3,058 were cancelled.

What is the most common cause of delays at ASE? ▼

The top delay cause at Aspen, CO is Carrier. Carrier accounts for 34.7% of all delay minutes.

What is the average delay time at ASE? ▼

The average delay at Aspen, CO is 97.1 minutes. This includes delays from carrier issues, weather, National Aviation System constraints, security, and late-arriving aircraft.

What is the best month to fly from ASE? ▼

Based on historical data, November has the best on-time performance at ASE with 92.5% of flights departing on time.

What is the worst month for delays at ASE? ▼

December tends to have the most delays at ASE, with an on-time rate of only 82%.

How many routes operate from ASE? ▼

Aspen, CO serves at least 14 routes. The busiest route is DEN to ASE (Denver - Aspen) with 14,210 flights.

What is the cancellation rate at ASE? ▼

Aspen, CO has a cancellation rate of 3.88%, based on 3,058 cancelled flights out of 78,805 total flights tracked.

Flight Guides

Data-driven guides to help you understand airport and flight performance.

Best & Worst Airlines for On-Time Performance

Which carriers consistently outperform peers

Why Flights Get Cancelled

Cancellation causes broken down by data

How to Choose Reliable Flight Routes

Use delay data to pick flights that arrive on time

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Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data (2020–2025). Statistics reflect cumulative performance across all available reporting periods. On-time rates exclude cancelled and diverted flights.

Read our methodology - how this data is sourced, computed, and verified.

Using ASE's data

An airport-level on-time rate is a starting point, not a guarantee for your specific flight.

Check the busiest route from ASE before you book a connection. See top routes
Travel in November rather than December if your dates are flexible. Seasonal patterns
Scores vary by airline and route within the same airport; check the specific carrier you're flying. Browse airlines

On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.

All airports → | Rankings →

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights Editorial

Source: U.S. Bureau of Transportation Statistics (BTS) Airline on-time performance and operational reliability · 2025 Accessed 2026-07-23

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. Airport figures are computed directly from BTS On-Time Performance data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.