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Route on-time record

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

Aspen (Aspen-Pitkin County Airport (Sardy Field)) to Chicago (Chicago O'Hare International Airport). 1,040 nonstop flights in Jun 2025 to May 2026, 61% arrived within 15 minutes and 6.2% were cancelled. The most reliable flight number was SkyWest 5956 at 12:25 PM.

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

ASE → ORD

Aspen to Chicago: 1,040 nonstop flights a year

On time (12 months)

61%

Cancelled

6.2%

avg delay 40 min

Best time to leave

Before 9 AM

75% on time vs 49% 3 to 6 PM

Most reliable airline

SkyWest

57% chance on time

Check ASE to ORD fares

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 5956 · sold as United Express, Delta Connection, American Eagle or Alaska

    12:25 PM → 4:24 PM3h 00m nonstop

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

    67%

    chance on time

    On time (history)
    73%
    Cancelled
    3.0%
    Avg arrival delay
    24 min
    • Arrived on time 73% of the time (194 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).
    • Lands inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.

    Moderate track record · 194 flights

    Find 12:25 PM flight fares Opens this date on Aviasales

  2. #2 · SkyWest 5347 · sold as United Express, Delta Connection, American Eagle or Alaska

    7:56 AM → 11:58 AM3h 02m nonstop

    Local times, typical schedule. Last flown 2026-04-12.

    67%

    chance on time

    On time (history)
    74%
    Cancelled
    3.6%
    Avg arrival delay
    33 min
    • Arrived on time 74% of the time (54 flights, Jun 2025 to May 2026).
    • Cancelled 3.6% of the time (2 of 56).
    • Leaves in this route's most on-time window (Before 9 AM: 75% on time; 3 to 6 PM: 49%).
    • Departs inside ASE's trouble window: 85% of its 46 ground stops and delay programs started between 6 AM and noon.

    Limited track record · 54 flights

    Find 7:56 AM flight fares Opens this date on Aviasales

  3. #3 · SkyWest 4669 · sold as United Express, Delta Connection, American Eagle or Alaska

    9:05 AM → 1:11 PM3h 06m nonstop

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

    62%

    chance on time

    On time (history)
    64%
    Cancelled
    2.5%
    Avg arrival delay
    33 min
    • Arrived on time 64% of the time (233 flights, Jun 2025 to May 2026).
    • Departs inside ASE's trouble window: 85% of its 46 ground stops and delay programs started between 6 AM and noon.

    Strong track record · 233 flights

    Find 9:05 AM flight fares Opens this date on Aviasales

  4. #4 · SkyWest 4899 · sold as United Express, Delta Connection, American Eagle or Alaska

    12:39 PM → 4:40 PM3h 01m nonstop

    Local times, typical schedule. Last flown 2026-04-05.

    57%

    chance on time

    On time (history)
    60%
    Cancelled
    15.4%
    Avg arrival delay
    14 min
    • Arrived on time 60% of the time (10 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).
    • Lands inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (10 flights), so its score leans on the airline's record at this hour.

    Limited track record · 10 flights

    Find 12:39 PM flight fares Opens this date on Aviasales

  5. #5 · SkyWest 5969 · sold as United Express, Delta Connection, American Eagle or Alaska

    4:20 PM → 8:20 PM3h 00m nonstop

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

    54%

    chance on time

    On time (history)
    59%
    Cancelled
    8.2%
    Avg arrival delay
    29 min
    • Arrived on time 59% of the time (90 flights, Jun 2025 to May 2026).
    • Cancelled 8.2% of the time (8 of 98).
    • Leaves in this route's least on-time window (3 to 6 PM: 49% on time; Before 9 AM: 75%).
    • Departs outside ASE's trouble window (6 AM to noon, when 85% of its 46 ground stops and delay programs started).

    Moderate track record · 90 flights

    Find 4:20 PM flight fares Opens this date on Aviasales

  6. #6 · SkyWest 4891 · sold as United Express, Delta Connection, American Eagle or Alaska

    11:51 AM → 3:49 PM2h 58m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    51%

    chance on time

    On time (history)
    51%
    Cancelled
    8.4%
    Avg arrival delay
    67 min
    • Arrived on time 51% of the time (75 flights, Jun 2025 to May 2026).
    • Cancelled 8.4% of the time (7 of 83).
    • Departs inside ASE's trouble window: 85% of its 46 ground stops and delay programs started between 6 AM and noon.
    • Lands inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.

    Moderate track record · 75 flights

    Find 11:51 AM flight fares Opens this date on Aviasales

  7. #7 · SkyWest 6502 · sold as United Express, Delta Connection, American Eagle or Alaska

    1:24 PM → 5:25 PM3h 01m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    47%

    chance on time

    On time (history)
    49%
    Cancelled
    13.3%
    Avg arrival delay
    54 min
    • Arrived on time 49% of the time (85 flights, Jun 2025 to May 2026).
    • Cancelled 13.3% of the time (13 of 98).
    • Departs outside ASE's trouble window (6 AM to noon, when 85% of its 46 ground stops and delay programs started).
    • Lands inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.

    Moderate track record · 85 flights

    Find 1:24 PM flight fares Opens this date on Aviasales

  8. #8 · SkyWest 6206 · sold as United Express, Delta Connection, American Eagle or Alaska

    3:46 PM → 7:47 PM3h 01m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    45%

    chance on time

    On time (history)
    45%
    Cancelled
    12.5%
    Avg arrival delay
    62 min
    • Arrived on time 45% of the time (42 flights, Jun 2025 to May 2026).
    • Cancelled 12.5% of the time (6 of 48).
    • Leaves in this route's least on-time window (3 to 6 PM: 49% on time; Before 9 AM: 75%).
    • Departs outside ASE's trouble window (6 AM to noon, when 85% of its 46 ground stops and delay programs started).

    Limited track record · 42 flights

    Find 3:46 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)57%

    1,040 flights · 61% on time as flown · 6.2% cancel

On time by departure time

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

  • Before 9 AM75%

    112 flights · avg delay 27 min

  • 9 AM to noon63%

    276 flights · avg delay 34 min

  • Noon to 3 PM60%

    502 flights · avg delay 45 min

  • 3 to 6 PM49%

    150 flights · avg delay 45 min

Best day: Wednesday (76%). Worst: Saturday (58%).

Smarter routing

Nearby airports that run more on time

  • EGE → ORD 66% chance on time

    Eagle County Regional Airport to Chicago O'Hare International Airport · 411 flights a year · 29 mi from your airports · yours: 57%

    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
61
F
63
M
60
A
65
M
75
J
66
J
68
A
70
S
76
O
77
N
-
D
59

What delays this route

  • Severe weather34%
  • Late-arriving aircraft25%
  • Air traffic control and airport volume21%
  • Airline (crew, maintenance, boarding)19%

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 ORD questions

What time of day is best to fly ASE to ORD?
Before 9 AM: 75% of flights arrived on time, against 49% 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 ORD?
SkyWest, with a season-adjusted 57% chance of operating and arriving on time over 1,040 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 ORD?
December (59% on time); the best was October (77%), 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