Route on-time record

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

Chicago (Chicago O'Hare International Airport) to Aspen (Aspen-Pitkin County Airport (Sardy Field)). 1,042 nonstop flights in Jun 2025 to May 2026, 61% arrived within 15 minutes and 2.6% were cancelled. The most reliable flight number was SkyWest 5738 at 7:35 AM.

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

ORD → ASE

Chicago to Aspen: 1,042 nonstop flights a year

On time (12 months)

61%

Cancelled

2.6%

avg delay 40 min

Best time to leave

6 to 9 PM

74% on time vs 50% noon to 3 PM

Most reliable airline

SkyWest

60% chance on time

Check ORD to ASE 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 · SkyWest 5738 · sold as United Express, Delta Connection, American Eagle or Alaska
7:35 AM → 10:06 AM3h 31m nonstop
Local times, typical schedule. Last flown 2026-04-11.
72%
chance on time
On time (history)
87%
Cancelled
3.0%
Avg arrival delay
13 min
- Arrived on time 87% of the time (31 flights, Jun 2025 to May 2026).
- Cancelled 3.0% of the time (1 of 33).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Lands inside ASE's trouble window: 85% of its 46 ground stops and delay programs started between 6 AM and noon.
Limited track record · 31 flights
Find 7:35 AM flight fares Opens this date on Aviasales
#2 · SkyWest 5254 · sold as United Express, Delta Connection, American Eagle or Alaska
7:45 PM → 10:00 PM3h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
71%
chance on time
On time (history)
91%
Cancelled
0.0%
Avg arrival delay
4 min
- Arrived on time 91% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (6 to 9 PM: 74% on time; Noon to 3 PM: 50%).
- Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find 7:45 PM flight fares Opens this date on Aviasales
#3 · SkyWest 5710 · sold as United Express, Delta Connection, American Eagle or Alaska
9:14 AM → 11:33 AM3h 19m nonstop
Local times, typical schedule. Last flown 2026-04-22.
67%
chance on time
On time (history)
78%
Cancelled
4.0%
Avg arrival delay
13 min
- Arrived on time 78% of the time (23 flights, Jun 2025 to May 2026).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Lands inside ASE's trouble window: 85% of its 46 ground stops and delay programs started between 6 AM and noon.
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find 9:14 AM flight fares Opens this date on Aviasales
#4 · SkyWest 5895 · sold as United Express, Delta Connection, American Eagle or Alaska
3:35 PM → 5:58 PM3h 23m nonstop
Local times, typical schedule. Last flown 2026-04-11.
63%
chance on time
On time (history)
71%
Cancelled
5.9%
Avg arrival delay
33 min
- Arrived on time 71% of the time (31 flights, Jun 2025 to May 2026).
- Cancelled 5.9% of the time (2 of 34).
- Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (31 flights), so its score leans on the airline's record at this hour.
Limited track record · 31 flights
Find 3:35 PM flight fares Opens this date on Aviasales
#5 · SkyWest 5876 · sold as United Express, Delta Connection, American Eagle or Alaska
9:00 AM → 11:41 AM3h 41m nonstop
Local times, typical schedule. Last flown 2026-03-28.
62%
chance on time
On time (history)
62%
Cancelled
0.5%
Avg arrival delay
35 min
- Arrived on time 62% of the time (177 flights, Jun 2025 to May 2026).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Lands inside ASE's trouble window: 85% of its 46 ground stops and delay programs started between 6 AM and noon.
Moderate track record · 177 flights
Find 9:00 AM flight fares Opens this date on Aviasales
#6 · SkyWest 6324 · sold as United Express, Delta Connection, American Eagle or Alaska
7:15 AM → 9:37 AM3h 22m nonstop
Local times, typical schedule. Last flown 2026-04-06.
61%
chance on time
On time (history)
61%
Cancelled
2.5%
Avg arrival delay
44 min
- Arrived on time 61% of the time (38 flights, Jun 2025 to May 2026).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Lands inside ASE's trouble window: 85% of its 46 ground stops and delay programs started between 6 AM and noon.
- Short track record (38 flights), so its score leans on the airline's record at this hour.
Limited track record · 38 flights
Find 7:15 AM flight fares Opens this date on Aviasales
#7 · SkyWest 4646 · sold as United Express, Delta Connection, American Eagle or Alaska
8:52 AM → 11:01 AM3h 09m nonstop
Local times, typical schedule. Last flown 2026-05-31.
61%
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).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Lands 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 8:52 AM flight fares Opens this date on Aviasales
#8 · SkyWest 5409 · sold as United Express, Delta Connection, American Eagle or Alaska
12:45 PM → 3:20 PM3h 35m nonstop
Local times, typical schedule. Last flown 2026-03-28.
61%
chance on time
On time (history)
79%
Cancelled
4.8%
Avg arrival delay
24 min
- Arrived on time 79% of the time (19 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 50% on time; 6 to 9 PM: 74%).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Short track record (19 flights), so its score leans on the airline's record at this hour.
Limited track record · 19 flights
Find 12:45 PM flight fares Opens this date on Aviasales
#9 · SkyWest 5320 · sold as United Express, Delta Connection, American Eagle or Alaska
1:00 PM → 3:17 PM3h 17m nonstop
Local times, typical schedule. Last flown 2026-04-11.
60%
chance on time
On time (history)
59%
Cancelled
2.6%
Avg arrival delay
35 min
- Arrived on time 59% of the time (69 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 50% on time; 6 to 9 PM: 74%).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
Moderate track record · 69 flights
Find 1:00 PM flight fares Opens this date on Aviasales
#10 · SkyWest 6250 · sold as United Express, Delta Connection, American Eagle or Alaska
12:24 PM → 2:52 PM3h 28m nonstop
Local times, typical schedule. Last flown 2026-04-06.
46%
chance on time
On time (history)
41%
Cancelled
6.1%
Avg arrival delay
57 min
- Arrived on time 41% of the time (87 flights, Jun 2025 to May 2026).
- Cancelled 6.1% of the time (6 of 98).
- Leaves in this route's least on-time window (Noon to 3 PM: 50% on time; 6 to 9 PM: 74%).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
Moderate track record · 87 flights
Find 12:24 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)60%
1,042 flights · 61% on time as flown · 2.6% cancel

On time by departure time

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

Before 9 AM65%
140 flights · avg delay 36 min
9 AM to noon58%
464 flights · avg delay 36 min
Noon to 3 PM50%
154 flights · avg delay 50 min
3 to 6 PM63%
127 flights · avg delay 30 min
6 to 9 PM74%
157 flights · avg delay 56 min

Best day: Wednesday (71%). Worst: Friday (55%).

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.

What delays this route

Airline (crew, maintenance, boarding)31%
Air traffic control and airport volume31%
Late-arriving aircraft20%
Severe weather18%

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

ORD to ASE questions

What time of day is best to fly ORD to ASE?: 6 to 9 PM: 74% of flights arrived on time, against 50% for departures noon to 3 PM.
Which airline is most on time from ORD to ASE?: SkyWest, with a season-adjusted 60% chance of operating and arriving on time over 1,042 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 ORD to ASE?: December (53% on time); the best was October (78%), 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.

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