Route on-time record
SFO to ASE: most on-time flights and the best time to fly
San Francisco (San Francisco International Airport) to Aspen (Aspen-Pitkin County Airport (Sardy Field)). 380 nonstop flights in Jun 2025 to May 2026, 73% arrived within 15 minutes and 2.6% were cancelled. The most reliable flight number was SkyWest 5862 at 6:48 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
SFO → ASE
San Francisco to Aspen: 380 nonstop flights a year
On time (12 months)
73%
Cancelled
2.6%
avg delay 46 min
Best time to leave
6 to 9 PM
88% on time vs 63% before 9 AM
Most reliable airline
SkyWest
71% chance on time
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 5862 · sold as United Express, Delta Connection, American Eagle or Alaska
6:48 PM → 10:15 PM2h 27m nonstop
Local times, typical schedule. Last flown 2026-04-10.
79%
chance on time
- On time (history)
- 88%
- Cancelled
- 7.8%
- Avg arrival delay
- 45 min
- Arrived on time 88% of the time (42 flights, Jun 2025 to May 2026).
- Cancelled 7.8% of the time (4 of 51).
- Leaves in this route's most on-time window (6 to 9 PM: 88% on time; Before 9 AM: 63%).
- Departs outside SFO's trouble window (7 AM to 1 PM, when 61% of its 333 ground stops and delay programs started).
Limited track record · 42 flights
Find 6:48 PM flight fares Opens this date on Aviasales#2 · SkyWest 6028 · sold as United Express, Delta Connection, American Eagle or Alaska
9:25 AM → 1:08 PM2h 43m nonstop
Local times, typical schedule. Last flown 2026-04-11.
61%
chance on time
- On time (history)
- 58%
- Cancelled
- 5.6%
- Avg arrival delay
- 55 min
- Arrived on time 58% of the time (48 flights, Jun 2025 to May 2026).
- Cancelled 5.6% of the time (3 of 54).
- Departs inside SFO's trouble window: 61% of its 333 ground stops and delay programs started between 7 AM and 1 PM.
- Short track record (48 flights), so its score leans on the airline's record at this hour.
Limited track record · 48 flights
Find 9:25 AM 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)71%
380 flights · 73% on time as flown · 2.6% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM63%
52 flights · avg delay 28 min
- 9 AM to noon70%
94 flights · avg delay 38 min
- 3 to 6 PM72%
178 flights · avg delay 56 min
- 6 to 9 PM88%
51 flights · avg delay 45 min
Best day: Wednesday (78%). Worst: Friday (62%).
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)40%
- Late-arriving aircraft28%
- Air traffic control and airport volume24%
- Severe weather7%
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
SFO to ASE questions
- What time of day is best to fly SFO to ASE?
- 6 to 9 PM: 88% of flights arrived on time, against 63% for departures before 9 AM.
- Which airline is most on time from SFO to ASE?
- SkyWest, with a season-adjusted 71% chance of operating and arriving on time over 380 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 SFO to ASE?
- December (44% on time); the best was September (89%), 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 SFO
- ASE to SFO (return)
- SFO to LAX 76%
- SFO to SEA 74%
- SFO to JFK 80%
- SFO to SAN 68%
- SFO to LAS 76%
- SFO to ORD 77%
- SFO to DEN 76%
- SFO to SNA 81%
- SFO to PHX 76%
- SFO to BOS 78%
- SFO to EWR 76%
- SFO to DFW 75%
Live status: FAA delays and ground stops