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Route on-time record

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

Houston (George Bush Intercontinental Airport) to Santa Ana (John Wayne Orange County International Airport). 1,094 nonstop flights in Jun 2025 to May 2026, 87% arrived within 15 minutes and 0.2% were cancelled. The most reliable flight number was United 1383 at 9:30 AM.

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

IAH → SNA

Houston to Santa Ana: 1,094 nonstop flights a year

On time (12 months)

87%

Cancelled

0.2%

avg delay 8 min

Best time to leave

9 AM to noon

93% on time vs 83% noon to 3 PM

Most reliable airline

United

87% chance on time

Check IAH to SNA fares

Lowest nonstop fare seen in the next two months: $254 (United 589 on 2026-11-18). 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 1383

    9:30 AM → 11:13 AM3h 43m nonstop

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

    93%

    chance on time

    On time (history)
    93%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 93% of the time (362 flights, Jun 2025 to May 2026).
    • Never cancelled in 365 scheduled flights.
    • Leaves in this route's most on-time window (9 AM to noon: 93% on time; Noon to 3 PM: 83%).
    • Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).

    Strong track record · 362 flights

    Find United 1383 fares Opens this date on Aviasales

  2. #2 · United 1172

    11:55 AM → 1:36 PM3h 41m nonstop

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

    91%

    chance on time

    On time (history)
    92%
    Cancelled
    0.0%
    Avg arrival delay
    6 min
    • Arrived on time 92% of the time (64 flights, Jun 2025 to May 2026).
    • Never cancelled in 64 scheduled flights.
    • Leaves in this route's most on-time window (9 AM to noon: 93% on time; Noon to 3 PM: 83%).
    • Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).

    Moderate track record · 64 flights

    Find United 1172 fares Opens this date on Aviasales

  3. #3 · United 1545

    8:04 PM → 9:45 PM3h 41m nonstop

    Local times, typical schedule. Last flown 2026-04-30.

    86%

    chance on time

    On time (history)
    90%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 90% of the time (73 flights, Jun 2025 to May 2026).
    • Never cancelled in 73 scheduled flights.
    • Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).

    Moderate track record · 73 flights

    Find United 1545 fares Opens this date on Aviasales

  4. #4 · United 2109

    7:50 PM → 9:31 PM3h 41m nonstop

    Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as United 1590; its record covers all of them.

    85%

    chance on time

    On time (history)
    82%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 82% of the time (44 flights, Jun 2025 to May 2026).
    • Never cancelled in 44 scheduled flights.
    • Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).
    • Short track record (44 flights), so its score leans on the airline's record at this hour.

    Limited track record · 44 flights

    Find United 2109 fares Opens this date on Aviasales

  5. #5 · United 1612

    12:15 PM → 2:11 PM3h 56m nonstop

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

    84%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    15 min
    • Arrived on time 88% of the time (24 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (Noon to 3 PM: 83% on time; 9 AM to noon: 93%).
    • Departs inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
    • Short track record (24 flights), so its score leans on the airline's record at this hour.

    Limited track record · 24 flights

    Find United 1612 fares Opens this date on Aviasales

  6. #6 · United 2766

    8:12 PM → 9:45 PM3h 33m nonstop

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

    81%

    chance on time

    On time (history)
    70%
    Cancelled
    0.0%
    Avg arrival delay
    10 min
    • Arrived on time 70% of the time (10 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).
    • Short track record (10 flights), so its score leans on the airline's record at this hour.

    Limited track record · 10 flights

    Find United 2766 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines87%

    1,094 flights · 87% on time as flown · 0.2% cancel

On time by departure time

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

  • 9 AM to noon93%

    417 flights · avg delay 4 min

  • Noon to 3 PM83%

    311 flights · avg delay 14 min

  • 6 to 9 PM85%

    365 flights · avg delay 6 min

Best day: Tuesday (87%). Worst: Sunday (80%).

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
84
F
88
M
87
A
86
M
74
J
70
J
68
A
86
S
90
O
88
N
87
D
90

What delays this route

  • Airline (crew, maintenance, boarding)37%
  • Late-arriving aircraft32%
  • Severe weather18%
  • Air traffic control and airport volume14%

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 SNA questions

What time of day is best to fly IAH to SNA?
9 AM to noon: 93% of flights arrived on time, against 83% for departures noon to 3 PM.
Which airline is most on time from IAH to SNA?
United, with a season-adjusted 87% chance of operating and arriving on time over 1,094 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 SNA?
July (68% on time); the best was September (90%), 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

Live status: FAA delays and ground stops