Route on-time record
IAH to AUS: most on-time flights and the best time to fly
Houston (George Bush Intercontinental Airport) to Austin (Austin Bergstrom International Airport). 2,674 nonstop flights in Jun 2025 to May 2026, 79% arrived within 15 minutes and 1.0% were cancelled. The most reliable flight number was United 2070 at 7:35 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
IAH → AUS
Houston to Austin: 2,674 nonstop flights a year
On time (12 months)
79%
Cancelled
1.0%
avg delay 16 min
Best time to leave
Before 9 AM
90% on time vs 66% 3 to 6 PM
Most reliable airline
SkyWest
81% 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 · United 2070
7:35 AM → 8:39 AM1h 04m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 2017, 1701, 1490; its record covers all of them.
88%
chance on time
- On time (history)
- 90%
- Cancelled
- 1.2%
- Avg arrival delay
- 5 min
- Arrived on time 90% of the time (83 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 66%).
- Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).
Moderate track record · 83 flights
Find United 2070 fares Opens this date on Aviasales#2 · United 1823
10:10 AM → 11:19 AM1h 06m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 2393; its record covers all of them.
86%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.5%
- Avg arrival delay
- 7 min
- Arrived on time 89% of the time (210 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).
- Lands inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
Strong track record · 210 flights
Find United 1823 fares Opens this date on Aviasales#3 · United 1859
11:55 AM → 1:04 PM1h 09m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
- On time (history)
- 84%
- Cancelled
- 1.6%
- Avg arrival delay
- 10 min
- Arrived on time 84% of the time (254 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).
- Lands inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
Strong track record · 254 flights
Find United 1859 fares Opens this date on Aviasales#4 · United 1179
10:15 PM → 11:15 PM1h 00m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
- On time (history)
- 81%
- Cancelled
- 2.3%
- Avg arrival delay
- 14 min
- Arrived on time 81% of the time (303 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).
Strong track record · 303 flights
Find United 1179 fares Opens this date on Aviasales#5 · United 2483
2:20 PM → 3:24 PM1h 04m nonstop
Local times, typical schedule. Last flown 2026-05-20.
78%
chance on time
- On time (history)
- 78%
- Cancelled
- 0.9%
- Avg arrival delay
- 17 min
- Arrived on time 78% of the time (323 flights, Jun 2025 to May 2026).
- Departs inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
- Lands inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
Strong track record · 323 flights
Find United 2483 fares Opens this date on Aviasales#6 · United 2674
6:50 PM → 7:57 PM1h 07m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 1980; its record covers all of them.
74%
chance on time
- On time (history)
- 74%
- Cancelled
- 1.7%
- Avg arrival delay
- 25 min
- Arrived on time 74% of the time (298 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).
Strong track record · 298 flights
Find United 2674 fares Opens this date on Aviasales#7 · United 2621
8:25 PM → 9:34 PM1h 09m nonstop
Local times, typical schedule. Last flown 2026-05-31.
71%
chance on time
- On time (history)
- 71%
- Cancelled
- 0.3%
- Avg arrival delay
- 22 min
- Arrived on time 71% of the time (323 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).
- 52% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 323 flights
Find United 2621 fares Opens this date on Aviasales#8 · United 1711
4:20 PM → 5:26 PM1h 06m nonstop
Local times, typical schedule. Last flown 2026-05-31.
67%
chance on time
- On time (history)
- 68%
- Cancelled
- 0.9%
- Avg arrival delay
- 21 min
- Arrived on time 68% of the time (324 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 66% 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.
Strong track record · 324 flights
Find United 1711 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)81%
95 flights · 79% on time as flown · 0.6% cancel
- United Airlines77%
2,579 flights · 79% on time as flown · 1.0% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM90%
352 flights · avg delay 6 min
- 9 AM to noon85%
365 flights · avg delay 11 min
- Noon to 3 PM80%
583 flights · avg delay 16 min
- 3 to 6 PM66%
343 flights · avg delay 22 min
- 6 to 9 PM73%
720 flights · avg delay 21 min
- After 9 PM81%
311 flights · avg delay 14 min
Best day: Tuesday (81%). Worst: Sunday (70%).
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
- Late-arriving aircraft37%
- Airline (crew, maintenance, boarding)30%
- Air traffic control and airport volume24%
- Severe weather8%
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 AUS questions
- What time of day is best to fly IAH to AUS?
- Before 9 AM: 90% of flights arrived on time, against 66% 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 IAH to AUS?
- SkyWest, with a season-adjusted 81% chance of operating and arriving on time over 95 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 AUS?
- June (62% on time); the best was February (87%), 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
- AUS 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 MIA 78%
- IAH to EWR 74%
- IAH to MCO 81%
- IAH to SFO 79%
- IAH to LAS 82%
- IAH to DCA 75%
Live status: FAA delays and ground stops