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ATIS Alerts Smart Flight Search

Find the flight least likely to be delayed

Beta

We rank real flight numbers by how often they flew and arrived on time over the last 12 months, adjusted for your travel month and departure time, then check nearby airports and calmer connections. US airlines and airports.

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

Lowest nonstop fare seen in the next two months: $235 (United 350 on 2026-10-22). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Best trips

9 nonstop. Best overall weighs the chance you arrive on time as booked, connection odds, travel time and separate tickets.

  1. Best overall#1 · Nonstop · 1h 06m

    5:30 AM → 6:36 AM

    92%

    arrive on time

    5:30 AM AUS → 6:36 AM IAH1h 06m

    United 1966

    Boeing 737-800 · 4–28 yrs old
    93% on time · 2.0% cancel
    Find United 1966 fares Opens this date on Aviasales

  2. #2 · Nonstop · 1h 06m

    7:25 PM → 8:31 PM

    84%

    arrive on time

    7:25 PM AUS → 8:31 PM IAH1h 06m

    United 1871

    Boeing 737 MAX 9 · 0–25 yrs old
    84% on time · 1.1% cancel
    Find United 1871 fares Opens this date on Aviasales

  3. #3 · Nonstop · 1h 06m

    2:10 PM → 3:16 PM

    83%

    arrive on time

    2:10 PM AUS → 3:16 PM IAH1h 06m

    United 334

    Boeing 737-900ER · 2–18 yrs old
    84% on time · 1.5% cancel
    Find United 334 fares Opens this date on Aviasales

  4. #4 · Nonstop · 1h 06m

    9:35 AM → 10:41 AM

    76%

    arrive on time

    9:35 AM AUS → 10:41 AM IAH1h 06m

    United 2196

    Airbus A320 · 12–28 yrs old
    77% on time · 1.5% cancel
    Find United 2196 fares Opens this date on Aviasales

  5. #5 · Nonstop · 1h 06m

    12:15 PM → 1:21 PM

    72%

    arrive on time

    12:15 PM AUS → 1:21 PM IAH1h 06m

    United 1747 · also flew as 657

    Airbus A319 or A320 · 10–28 yrs old
    73% on time · 1.3% cancel
    Find United 1747 fares Opens this date on Aviasales

  6. #6 · Nonstop · 1h 10m

    7:00 AM → 8:10 AM

    72%

    arrive on time

    7:00 AM AUS → 8:10 AM IAH1h 10m

    United 656

    Airbus A320 · 3–28 yrs old
    73% on time · 1.6% cancel
    Find United 656 fares Opens this date on Aviasales

  7. #7 · Nonstop · 1h 05m

    4:20 PM → 5:25 PM

    65%

    arrive on time

    4:20 PM AUS → 5:25 PM IAH1h 05m

    United 685

    Airbus A319 or A320 · 19–28 yrs old
    66% on time · 1.6% cancel
    Find United 685 fares Opens this date on Aviasales

  8. #8 · Nonstop · 1h 06m

    5:56 PM → 7:02 PM

    63%

    arrive on time

    5:56 PM AUS → 7:02 PM IAH1h 06m

    United 1326

    Airbus A319 or Boeing 737-800 · 13–28 yrs old
    64% on time · 1.6% cancel
    Find United 1326 fares Opens this date on Aviasales

  9. #9 · Nonstop · 1h 06m

    7:10 AM → 8:16 AM

    59%

    arrive on time

    7:10 AM AUS → 8:16 AM IAH1h 06m

    United 2393

    Boeing 737 MAX 8 · 1–13 yrs old
    60% on time · 1.5% cancel
    Find United 2393 fares Opens this date 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.

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%).

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