Reliable Flight Search results
Best trips
2 nonstop, 24 with 1 connection · ranked by overall best · published legroom for 26 of 26 · showing the top 3
Our best overall pick
71% chance you arrive on time · nonstop · 30 in legroom · planes about 2 years old · 3h 15m
Top pick#1 · Nonstop · 3h 15m
7:45 PM → 10:00 PM
50
score
price
live on Aviasales
71%
arrive on time
73% on time · 2.4% cancel7:45 PM ORD → 10:00 PM ASE3h 15m
SkyWest 5254 · sold as United Express, Delta Connection, American Eagle or Alaska
Embraer E175 · 1–12 yrs oldLegroom 30–32 in · 18–19.3 in wide · Main CabinFind 7:45 PM flight fares Opens this date on Aviasales#2 · 1 connection · 5h 01m · one ticket (United)
5:00 AM → 8:59 AM
41
score
price
live on Aviasales
92%
connections made
74%
arrive on time
93% on time · 0.5% cancel5:00 AM ORD → 6:41 AM DEN2h 41m
United 2666
Airbus A321neo · 1–13 yrs oldLegroom 30–31 in · 16.3–18.4 in wide · United EconomyConnect in DEN · 1h 19m · 96% chance to make it · same ticket: the airline rebooks you if you miss it81% on time · 3.7% cancel8:00 AM DEN → 8:59 AM ASE1h 01m
SkyWest 5782 · sold as United Express
Embraer E175 · 2–12 yrs oldLegroom 31 in · 18–18.2 in wide · United EconomyFind this United trip Look for United 2666 + SkyWest 5782 on Aviasales#3 · 1 connection · 7h 09m · one ticket (United)
5:00 AM → 11:09 AM
36
score
price
live on Aviasales
94%
connections made
77%
arrive on time
93% on time · 0.5% cancel5:00 AM ORD → 6:41 AM DEN2h 41m
United 2666
Airbus A321neo · 1–13 yrs oldLegroom 30–31 in · 16.3–18.4 in wide · United EconomyConnect in DEN · 3h 24m · 99% chance to make it · same ticket: the airline rebooks you if you miss it82% on time · 5.0% cancel10:05 AM DEN → 11:09 AM ASE1h 04m
SkyWest 5444 · sold as United Express
Embraer E175 · 2–12 yrs oldLegroom 31 in · 18–18.2 in wide · United EconomyFind this United trip Look for United 2666 + SkyWest 5444 on Aviasales
Aircraft and ages come from the planes each flight number actually flew in the last 3 months of data (FAA registry build years); airlines can swap planes. Legroom is the seat pitch the airline or a seat-map source publishes for that aircraft and cabin; we never estimate it, and seat maps change, so check the airline’s seat map when you book.
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
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
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%).
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