Route on-time record
IAH to ASE: most on-time flights and the best time to fly
Houston (George Bush Intercontinental Airport) to Aspen (Aspen-Pitkin County Airport (Sardy Field)). 598 nonstop flights in Jun 2025 to May 2026, 76% arrived within 15 minutes and 3.3% were cancelled. The most reliable flight number was SkyWest 5963 at 7:35 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
IAH → ASE
Houston to Aspen: 598 nonstop flights a year
On time (12 months)
76%
Cancelled
3.3%
avg delay 21 min
Best time to leave
Before 9 AM
90% on time vs 65% noon to 3 PM
Most reliable airline
SkyWest
73% 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 5963 · 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.
80%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 16 min
- Arrived on time 90% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 32 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; Noon to 3 PM: 65%).
- Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).
Limited track record · 31 flights
Find 7:35 AM flight fares Opens this date on Aviasales#2 · SkyWest 5917 · sold as United Express, Delta Connection, American Eagle or Alaska
6:05 PM → 8:27 PM3h 22m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
- On time (history)
- 83%
- Cancelled
- 8.0%
- Avg arrival delay
- 12 min
- Arrived on time 83% of the time (143 flights, Jun 2025 to May 2026).
- Cancelled 8.0% of the time (13 of 163).
- Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).
Moderate track record · 143 flights
Find 6:05 PM flight fares Opens this date on Aviasales#3 · SkyWest 5814 · sold as United Express, Delta Connection, American Eagle or Alaska
10:05 AM → 12:42 PM3h 37m nonstop
Local times, typical schedule. Last flown 2026-05-31.
75%
chance on time
- On time (history)
- 78%
- Cancelled
- 1.1%
- Avg arrival delay
- 21 min
- Arrived on time 78% of the time (176 flights, Jun 2025 to May 2026).
- Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).
Moderate track record · 176 flights
Find 10:05 AM flight fares Opens this date on Aviasales#4 · SkyWest 5354 · sold as United Express, Delta Connection, American Eagle or Alaska
12:25 PM → 2:47 PM3h 22m nonstop
Local times, typical schedule. Last flown 2026-04-11.
66%
chance on time
- On time (history)
- 66%
- Cancelled
- 2.5%
- Avg arrival delay
- 30 min
- Arrived on time 66% of the time (176 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 65% on time; Before 9 AM: 90%).
- Departs inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
Moderate track record · 176 flights
Find 12:25 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)73%
598 flights · 76% on time as flown · 3.3% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM90%
32 flights · avg delay 16 min
- 9 AM to noon78%
200 flights · avg delay 22 min
- Noon to 3 PM65%
185 flights · avg delay 29 min
- 6 to 9 PM83%
153 flights · avg delay 11 min
Best day: Wednesday (76%). Worst: Sunday (63%).
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)39%
- Air traffic control and airport volume37%
- Late-arriving aircraft13%
- Severe weather11%
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
IAH to ASE questions
- What time of day is best to fly IAH to ASE?
- Before 9 AM: 90% of flights arrived on time, against 65% for departures noon to 3 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 IAH to ASE?
- SkyWest, with a season-adjusted 73% chance of operating and arriving on time over 598 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 IAH to ASE?
- April (56% on time); the best was October (88%), 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 IAH
- ASE to IAH (return)
- IAH to ORD 75%
- IAH to DFW 75%
- IAH to LAX 83%
- IAH to ATL 77%
- IAH to DEN 81%
- IAH to LGA 72%
- IAH to EWR 74%
- IAH to MIA 78%
- IAH to MCO 81%
- IAH to SFO 79%
- IAH to LAS 82%
- IAH to DCA 75%
Live status: FAA delays and ground stops