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Route on-time record

AUS to IAH: most on-time flights and the best time to fly

Austin (Austin Bergstrom International Airport) to Houston (George Bush Intercontinental Airport). 2,673 nonstop flights in Jun 2025 to May 2026, 76% arrived within 15 minutes and 1.4% were cancelled. The most reliable flight number was United 1966 at 5:30 AM.

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

AUS → IAH

Austin to Houston: 2,673 nonstop flights a year

On time (12 months)

76%

Cancelled

1.4%

avg delay 17 min

Best time to leave

Before 9 AM

82% on time vs 66% 3 to 6 PM

Most reliable airline

United

75% chance on time

Check AUS to IAH 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. #1 · United 1966

    5:30 AM → 6:36 AM1h 06m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    92%

    chance on time

    On time (history)
    94%
    Cancelled
    2.2%
    Avg arrival delay
    7 min
    • Arrived on time 94% of the time (307 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 82% on time; 3 to 6 PM: 66%).
    • Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).

    Strong track record · 307 flights

    Find United 1966 fares Opens this date on Aviasales

  2. #2 · United 1871

    7:25 PM → 8:31 PM1h 06m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    84%

    chance on time

    On time (history)
    88%
    Cancelled
    0.8%
    Avg arrival delay
    16 min
    • Arrived on time 88% of the time (129 flights, Jun 2025 to May 2026).
    • Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).

    Moderate track record · 129 flights

    Find United 1871 fares Opens this date on Aviasales

  3. #3 · United 334

    2:10 PM → 3:16 PM1h 06m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    83%

    chance on time

    On time (history)
    87%
    Cancelled
    1.5%
    Avg arrival delay
    10 min
    • Arrived on time 87% of the time (134 flights, Jun 2025 to May 2026).
    • Departs inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
    • Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.

    Moderate track record · 134 flights

    Find United 334 fares Opens this date on Aviasales

  4. #4 · United 2196

    9:35 AM → 10:41 AM1h 06m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    76%

    chance on time

    On time (history)
    76%
    Cancelled
    1.5%
    Avg arrival delay
    14 min
    • Arrived on time 76% of the time (331 flights, Jun 2025 to May 2026).
    • Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).

    Strong track record · 331 flights

    Find United 2196 fares Opens this date on Aviasales

  5. #5 · United 1747

    12:15 PM → 1:21 PM1h 06m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 657; its record covers all of them.

    72%

    chance on time

    On time (history)
    73%
    Cancelled
    1.2%
    Avg arrival delay
    15 min
    • Arrived on time 73% of the time (240 flights, Jun 2025 to May 2026).
    • Departs inside AUS's trouble window: 79% of its 91 ground stops and delay programs started between 10 AM and 4 PM.
    • Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.

    Strong track record · 240 flights

    Find United 1747 fares Opens this date on Aviasales

  6. #6 · United 656

    7:00 AM → 8:10 AM1h 10m nonstop

    Local times, typical schedule. Last flown 2026-03-28.

    72%

    chance on time

    On time (history)
    74%
    Cancelled
    1.7%
    Avg arrival delay
    11 min
    • Arrived on time 74% of the time (295 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 82% on time; 3 to 6 PM: 66%).
    • Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).

    Strong track record · 295 flights

    Find United 656 fares Opens this date on Aviasales

  7. #7 · United 685

    4:20 PM → 5:25 PM1h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    65%

    chance on time

    On time (history)
    66%
    Cancelled
    1.7%
    Avg arrival delay
    29 min
    • Arrived on time 66% of the time (225 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: 82%).
    • Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).
    • Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.

    Strong track record · 225 flights

    Find United 685 fares Opens this date on Aviasales

  8. #8 · United 1326

    5:56 PM → 7:06 PM1h 06m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    63%

    chance on time

    On time (history)
    63%
    Cancelled
    1.6%
    Avg arrival delay
    30 min
    • Arrived on time 63% of the time (305 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: 82%).
    • Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).

    Strong track record · 305 flights

    Find United 1326 fares Opens this date on Aviasales

  9. #9 · United 2393

    7:10 AM → 8:16 AM1h 06m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    59%

    chance on time

    On time (history)
    49%
    Cancelled
    1.6%
    Avg arrival delay
    18 min
    • Arrived on time 49% of the time (63 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 82% on time; 3 to 6 PM: 66%).
    • Departs outside AUS's trouble window (10 AM to 4 PM, when 79% of its 91 ground stops and delay programs started).

    Moderate track record · 63 flights

    Find United 2393 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines75%

    2,578 flights · 76% on time as flown · 1.4% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)74%

    95 flights · 74% on time as flown · 1.3% cancel

On time by departure time

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

  • Before 9 AM82%

    717 flights · avg delay 9 min

  • 9 AM to noon77%

    365 flights · avg delay 13 min

  • Noon to 3 PM78%

    605 flights · avg delay 15 min

  • 3 to 6 PM66%

    585 flights · avg delay 26 min

  • 6 to 9 PM76%

    401 flights · avg delay 25 min

Best day: Wednesday (81%). Worst: Sunday (75%).

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.

J
87
F
89
M
81
A
80
M
72
J
71
J
71
A
79
S
78
O
74
N
79
D
85

What delays this route

  • Air traffic control and airport volume39%
  • Late-arriving aircraft35%
  • Airline (crew, maintenance, boarding)21%
  • Severe weather5%

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

AUS to IAH questions

What time of day is best to fly AUS to IAH?
Before 9 AM: 82% 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 AUS to IAH?
United, with a season-adjusted 75% chance of operating and arriving on time over 2,578 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 AUS to IAH?
June (71% on time); the best was February (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 AUS

Live status: FAA delays and ground stops