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.
SNA → IAH
Santa Ana to Houston: 1,094 nonstop flights a year
On time (12 months)
88%
Cancelled
0.2%
avg delay 10 min
Best time to leave
Before 9 AM
96% on time vs 81% 3 to 6 PM
Most reliable airline
United
88% chance on time
Lowest nonstop fare seen in the next two months: $370 (United 643 on 2026-11-09). 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 700
8:00 AM → 1:16 PM3h 16m nonstop
Local times, typical schedule. Last flown 2026-05-31.
94%
chance on time
- On time (history)
- 94%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 94% of the time (87 flights, Jun 2025 to May 2026).
- Never cancelled in 88 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; 3 to 6 PM: 81%).
- Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
Moderate track record · 87 flights
Find United 700 fares Opens this date on Aviasales#2 · United 2451
12:29 PM → 5:39 PM3h 10m nonstop
Local times, typical schedule. Last flown 2026-03-28.
88%
chance on time
- On time (history)
- 87%
- Cancelled
- 0.0%
- Avg arrival delay
- 27 min
- Arrived on time 87% of the time (23 flights, Jun 2025 to May 2026).
- Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 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 2451 fares Opens this date on Aviasales#3 · United 657
12:13 PM → 5:25 PM3h 12m nonstop
Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as United 742; its record covers all of them.
88%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 89% of the time (53 flights, Jun 2025 to May 2026).
- Never cancelled in 53 scheduled flights.
- Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
- Short track record (53 flights), so its score leans on the airline's record at this hour.
Limited track record · 53 flights
Find United 657 fares Opens this date on Aviasales#4 · United 643
3:29 PM → 8:43 PM3h 14m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 1950; its record covers all of them.
84%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 85% of the time (165 flights, Jun 2025 to May 2026).
- Never cancelled in 165 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 81% on time; Before 9 AM: 96%).
Moderate track record · 165 flights
Find United 643 fares Opens this date on Aviasales#5 · United 2044
11:58 AM → 5:20 PM3h 22m nonstop
Local times, typical schedule. Last flown 2026-05-31.
80%
chance on time
- On time (history)
- 64%
- Cancelled
- 0.0%
- Avg arrival delay
- 21 min
- Arrived on time 64% of the time (11 flights, Jun 2025 to May 2026).
- Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find United 2044 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines88%
1,094 flights · 88% on time as flown · 0.2% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM96%
365 flights · avg delay 4 min
- Noon to 3 PM87%
356 flights · avg delay 10 min
- 3 to 6 PM81%
362 flights · avg delay 17 min
Best day: Tuesday (91%). Worst: Sunday (85%).
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