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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.

PHX → IAH

Phoenix to Houston: 2,911 nonstop flights a year

On time (12 months)

81%

Cancelled

1.1%

avg delay 16 min

Best time to leave

Before 9 AM

87% on time vs 72% 6 to 9 PM

Most reliable airline

Envoy

83% chance on time

Check PHX to IAH fares

Lowest nonstop fare seen in the next two months: $138 (Frontier 1704 on 2026-10-24). 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 1318

    6:05 AM → 10:42 AM2h 37m nonstop

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

    92%

    chance on time

    On time (history)
    93%
    Cancelled
    0.7%
    Avg arrival delay
    5 min
    • Arrived on time 93% of the time (141 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 87% on time; 6 to 9 PM: 72%).
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).

    Moderate track record · 141 flights

    Find United 1318 fares Opens this date on Aviasales

  2. #2 · United 378

    10:30 AM → 3:07 PM2h 37m nonstop

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

    87%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    12 min
    • Arrived on time 88% of the time (171 flights, Jun 2025 to May 2026).
    • Never cancelled in 172 scheduled flights.
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 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.

    Moderate track record · 171 flights

    Find United 378 fares Opens this date on Aviasales

  3. #3 · United 1540

    8:00 AM → 12:37 PM2h 37m nonstop

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

    87%

    chance on time

    On time (history)
    88%
    Cancelled
    2.3%
    Avg arrival delay
    9 min
    • Arrived on time 88% of the time (42 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 87% on time; 6 to 9 PM: 72%).
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 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.

    Limited track record · 42 flights

    Find United 1540 fares Opens this date on Aviasales

  4. #4 · United 631

    3:59 PM → 8:37 PM2h 38m nonstop

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

    85%

    chance on time

    On time (history)
    83%
    Cancelled
    0.0%
    Avg arrival delay
    23 min
    • Arrived on time 83% of the time (23 flights, Jun 2025 to May 2026).
    • Departs inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (23 flights), so its score leans on the airline's record at this hour.

    Limited track record · 23 flights

    Find United 631 fares Opens this date on Aviasales

  5. #5 · American 3076

    8:38 AM → 1:23 PM2h 45m nonstop

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

    82%

    chance on time

    On time (history)
    86%
    Cancelled
    0.0%
    Avg arrival delay
    9 min
    • Arrived on time 86% of the time (44 flights, Jun 2025 to May 2026).
    • Never cancelled in 44 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 87% on time; 6 to 9 PM: 72%).
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).

    Limited track record · 44 flights

    Find American 3076 fares Opens this date on Aviasales

  6. #6 · Frontier 1704

    9:15 AM → 1:56 PM2h 41m nonstop

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

    80%

    chance on time

    On time (history)
    81%
    Cancelled
    1.9%
    Avg arrival delay
    14 min
    • Arrived on time 81% of the time (154 flights, Jun 2025 to May 2026).
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 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.

    Moderate track record · 154 flights

    Find Frontier 1704 fares Opens this date on Aviasales

  7. #7 · United 2275

    8:30 AM → 1:06 PM2h 36m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 2226, 1246; its record covers all of them.

    80%

    chance on time

    On time (history)
    76%
    Cancelled
    0.0%
    Avg arrival delay
    18 min
    • Arrived on time 76% of the time (66 flights, Jun 2025 to May 2026).
    • Never cancelled in 67 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 87% on time; 6 to 9 PM: 72%).
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).

    Moderate track record · 66 flights

    Find United 2275 fares Opens this date on Aviasales

  8. #8 · United 1373

    12:30 PM → 5:14 PM2h 37m nonstop

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

    79%

    chance on time

    On time (history)
    78%
    Cancelled
    0.0%
    Avg arrival delay
    21 min
    • Arrived on time 78% of the time (88 flights, Jun 2025 to May 2026).
    • Never cancelled in 88 scheduled flights.
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 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.

    Moderate track record · 88 flights

    Find United 1373 fares Opens this date on Aviasales

  9. #9 · United 2164

    5:01 PM → 9:36 PM2h 35m nonstop

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

    79%

    chance on time

    On time (history)
    70%
    Cancelled
    4.8%
    Avg arrival delay
    37 min
    • Arrived on time 70% of the time (20 flights, Jun 2025 to May 2026).
    • Departs inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (20 flights), so its score leans on the airline's record at this hour.

    Limited track record · 20 flights

    Find United 2164 fares Opens this date on Aviasales

  10. #10 · Envoy 3363 · sold as American Eagle

    6:50 PM → 11:26 PM2h 36m nonstop

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

    78%

    chance on time

    On time (history)
    86%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 86% of the time (14 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 72% on time; Before 9 AM: 87%).
    • Departs inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (14 flights), so its score leans on the airline's record at this hour.

    Limited track record · 14 flights

    Find 6:50 PM flight fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Envoy Air (sold as American Eagle)83%

    98 flights · 84% on time as flown · 1.0% cancel

  • United Airlines83%

    1,787 flights · 84% on time as flown · 0.8% cancel

  • Frontier Airlines77%

    265 flights · 77% on time as flown · 1.3% cancel

  • American Airlines76%

    579 flights · 77% on time as flown · 1.3% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)72%

    182 flights · 72% on time as flown · 2.0% cancel

On time by departure time

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

  • Before 9 AM87%

    817 flights · avg delay 8 min

  • 9 AM to noon86%

    650 flights · avg delay 11 min

  • Noon to 3 PM77%

    538 flights · avg delay 23 min

  • 3 to 6 PM76%

    521 flights · avg delay 22 min

  • 6 to 9 PM72%

    384 flights · avg delay 21 min

Best day: Tuesday (87%). Worst: Sunday (81%).

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