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Route on-time record

ASE to DEN: most on-time flights and the best time to fly

Aspen (Aspen-Pitkin County Airport (Sardy Field)) to Denver (Denver International Airport). 2,715 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 5.2% were cancelled. The most reliable flight number was SkyWest 5770 at 9:15 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

ASE → DEN

Aspen to Denver: 2,715 nonstop flights a year

On time (12 months)

74%

Cancelled

5.2%

avg delay 26 min

Best time to leave

Before 9 AM

79% on time vs 65% 3 to 6 PM

Most reliable airline

SkyWest

70% chance on time

Check ASE to DEN fares

Lowest nonstop fare seen in the next two months: $240 (United 5778 on 2026-10-27). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

  1. #1 · SkyWest 5770 · sold as United Express, Delta Connection, American Eagle or Alaska

    9:15 AM → 10:33 AM1h 18m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    78%

    chance on time

    On time (history)
    81%
    Cancelled
    3.8%
    Avg arrival delay
    16 min
    • Arrived on time 81% of the time (252 flights, Jun 2025 to May 2026).
    • Cancelled 3.8% of the time (10 of 263).
    • Departs inside ASE's trouble window: 85% of its 46 ground stops and delay programs started between 6 AM and noon.

    Strong track record · 252 flights

    Find 9:15 AM flight fares Opens this date on Aviasales

  2. #2 · SkyWest 5766 · sold as United Express, Delta Connection, American Eagle or Alaska

    7:00 AM → 8:25 AM1h 18m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    75%

    chance on time

    On time (history)
    79%
    Cancelled
    4.2%
    Avg arrival delay
    20 min
    • Arrived on time 79% of the time (322 flights, Jun 2025 to May 2026).
    • Cancelled 4.2% of the time (14 of 336).
    • Leaves in this route's most on-time window (Before 9 AM: 79% on time; 3 to 6 PM: 65%).
    • Departs inside ASE's trouble window: 85% of its 46 ground stops and delay programs started between 6 AM and noon.

    Strong track record · 322 flights

    Find 7:00 AM flight fares Opens this date on Aviasales

  3. #3 · SkyWest 5772 · sold as United Express, Delta Connection, American Eagle or Alaska

    11:15 AM → 12:31 PM1h 16m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    73%

    chance on time

    On time (history)
    76%
    Cancelled
    3.7%
    Avg arrival delay
    20 min
    • Arrived on time 76% of the time (286 flights, Jun 2025 to May 2026).
    • Cancelled 3.7% of the time (11 of 298).
    • Departs inside ASE's trouble window: 85% of its 46 ground stops and delay programs started between 6 AM and noon.

    Strong track record · 286 flights

    Find 11:15 AM flight fares Opens this date on Aviasales

  4. #4 · SkyWest 5774 · sold as United Express, Delta Connection, American Eagle or Alaska

    1:22 PM → 2:41 PM1h 16m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    72%

    chance on time

    On time (history)
    75%
    Cancelled
    3.6%
    Avg arrival delay
    27 min
    • Arrived on time 75% of the time (321 flights, Jun 2025 to May 2026).
    • Cancelled 3.6% of the time (12 of 334).
    • Departs outside ASE's trouble window (6 AM to noon, when 85% of its 46 ground stops and delay programs started).
    • Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.

    Strong track record · 321 flights

    Find 1:22 PM flight fares Opens this date on Aviasales

  5. #5 · SkyWest 4687 · sold as United Express, Delta Connection, American Eagle or Alaska

    8:32 AM → 9:50 AM1h 18m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    72%

    chance on time

    On time (history)
    80%
    Cancelled
    0.0%
    Avg arrival delay
    7 min
    • Arrived on time 80% of the time (10 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 79% on time; 3 to 6 PM: 65%).
    • Departs inside ASE's trouble window: 85% of its 46 ground stops and delay programs started between 6 AM and noon.
    • Short track record (10 flights), so its score leans on the airline's record at this hour.

    Limited track record · 10 flights

    Find 8:32 AM flight fares Opens this date on Aviasales

  6. #6 · SkyWest 5615 · sold as United Express, Delta Connection, American Eagle or Alaska

    6:19 PM → 7:35 PM1h 16m nonstop

    Local times, typical schedule. Last flown 2026-04-21.

    71%

    chance on time

    On time (history)
    87%
    Cancelled
    6.3%
    Avg arrival delay
    10 min
    • Arrived on time 87% of the time (45 flights, Jun 2025 to May 2026).
    • Cancelled 6.3% of the time (3 of 48).
    • Departs outside ASE's trouble window (6 AM to noon, when 85% of its 46 ground stops and delay programs started).
    • Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.

    Limited track record · 45 flights

    Find 6:19 PM flight fares Opens this date on Aviasales

  7. #7 · SkyWest 5595 · sold as United Express, Delta Connection, American Eagle or Alaska

    12:14 PM → 1:30 PM1h 16m nonstop

    Local times, typical schedule. Last flown 2026-04-22.

    70%

    chance on time

    On time (history)
    88%
    Cancelled
    4.0%
    Avg arrival delay
    19 min
    • Arrived on time 88% of the time (24 flights, Jun 2025 to May 2026).
    • Departs outside ASE's trouble window (6 AM to noon, when 85% of its 46 ground stops and delay programs started).
    • Short track record (24 flights), so its score leans on the airline's record at this hour.

    Limited track record · 24 flights

    Find 12:14 PM flight fares Opens this date on Aviasales

  8. #8 · SkyWest 6015 · sold as United Express, Delta Connection, American Eagle or Alaska

    10:15 AM → 11:31 AM1h 16m nonstop

    Local times, typical schedule. Last flown 2026-04-22.

    70%

    chance on time

    On time (history)
    77%
    Cancelled
    4.1%
    Avg arrival delay
    17 min
    • Arrived on time 77% of the time (47 flights, Jun 2025 to May 2026).
    • Cancelled 4.1% of the time (2 of 49).
    • Departs inside ASE's trouble window: 85% of its 46 ground stops and delay programs started between 6 AM and noon.
    • 53% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 47 flights

    Find 10:15 AM flight fares Opens this date on Aviasales

  9. #9 · SkyWest 6045 · sold as United Express, Delta Connection, American Eagle or Alaska

    2:22 PM → 3:35 PM1h 13m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as SkyWest 4744; its record covers all of them.

    67%

    chance on time

    On time (history)
    77%
    Cancelled
    8.1%
    Avg arrival delay
    24 min
    • Arrived on time 77% of the time (91 flights, Jun 2025 to May 2026).
    • Cancelled 8.1% of the time (8 of 99).
    • Departs outside ASE's trouble window (6 AM to noon, when 85% of its 46 ground stops and delay programs started).
    • Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.

    Moderate track record · 91 flights

    Find 2:22 PM flight fares Opens this date on Aviasales

  10. #10 · SkyWest 5778 · sold as United Express, Delta Connection, American Eagle or Alaska

    5:16 PM → 6:32 PM1h 13m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as SkyWest 6011; its record covers all of them.

    66%

    chance on time

    On time (history)
    72%
    Cancelled
    9.8%
    Avg arrival delay
    26 min
    • Arrived on time 72% of the time (340 flights, Jun 2025 to May 2026).
    • Cancelled 9.8% of the time (37 of 377).
    • Leaves in this route's least on-time window (3 to 6 PM: 65% on time; Before 9 AM: 79%).
    • Departs outside ASE's trouble window (6 AM to noon, when 85% of its 46 ground stops and delay programs started).

    Strong track record · 340 flights

    Find 5:16 PM flight fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)70%

    2,715 flights · 74% on time as flown · 5.2% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • Before 9 AM79%

    593 flights · avg delay 19 min

  • 9 AM to noon79%

    650 flights · avg delay 18 min

  • Noon to 3 PM72%

    705 flights · avg delay 31 min

  • 3 to 6 PM65%

    514 flights · avg delay 37 min

  • 6 to 9 PM68%

    253 flights · avg delay 30 min

Best day: Tuesday (80%). Worst: Monday (68%).

Smarter routing

Nearby airports that run more on time

  • GUC → DEN 78% chance on time

    Gunnison Crested Butte Regional Airport to Denver International Airport · 994 flights a year · 48 mi from your airports · yours: 70%

    Rank flightsFares

  • EGE → DEN 73% chance on time

    Eagle County Regional Airport to Denver International Airport · 1,172 flights a year · 29 mi from your airports · yours: 70%

    Rank flightsFares

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

J
72
F
71
M
76
A
77
M
78
J
61
J
68
A
70
S
76
O
80
N
81
D
73

What delays this route

  • Air traffic control and airport volume33%
  • Late-arriving aircraft23%
  • Airline (crew, maintenance, boarding)22%
  • Severe weather21%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

ASE to DEN questions

What time of day is best to fly ASE to DEN?
Before 9 AM: 79% of flights arrived on time, against 65% for departures 3 to 6 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from ASE to DEN?
SkyWest, with a season-adjusted 70% chance of operating and arriving on time over 2,715 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on ASE to DEN?
June (61% on time); the best was November (81%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?
No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

More routes from ASE

Live status: FAA delays and ground stops