ATIS Alerts Smart Flight Search
Find the flight least likely to be delayed
BetaWe 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.
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
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 · 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 · 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 · 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 · 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 · 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 · 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%).
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