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.
SLC → ONT
Salt Lake City to Ontario: 1,240 nonstop flights a year
On time (12 months)
89%
Cancelled
1.0%
avg delay 8 min
Best time to leave
Before 9 AM
95% on time vs 85% 9 AM to noon
Most reliable airline
SkyWest
93% chance on time
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 · SkyWest 3762 · sold as United Express, Delta Connection, American Eagle or Alaska
3:23 PM → 4:17 PM1h 54m nonstop
Local times, typical schedule. Last flown 2026-05-31.
94%
chance on time
- On time (history)
- 96%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 96% of the time (25 flights, Jun 2025 to May 2026).
- Short track record (25 flights), so its score leans on the airline's record at this hour.
Limited track record · 25 flights
Find 3:23 PM flight fares Opens this date on Aviasales#2 · Delta 1302
8:02 AM → 8:53 AM1h 51m nonstop
Local times, typical schedule. Last flown 2026-05-31.
93%
chance on time
- On time (history)
- 100%
- Cancelled
- 5.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (19 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 95% on time; 9 AM to noon: 85%).
- Short track record (19 flights), so its score leans on the airline's record at this hour.
Limited track record · 19 flights
Find Delta 1302 fares Opens this date on Aviasales#3 · SkyWest 3809 · sold as United Express, Delta Connection, American Eagle or Alaska
3:30 PM → 4:25 PM1h 55m nonstop
Local times, typical schedule. Last flown 2026-05-06. Same departure also flew as SkyWest 3829; its record covers all of them.
92%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 90% of the time (60 flights, Jun 2025 to May 2026).
- Never cancelled in 60 scheduled flights.
Moderate track record · 60 flights
Find 3:30 PM flight fares Opens this date on Aviasales#4 · Frontier 1121
8:40 PM → 9:32 PM1h 57m nonstop
Local times, typical schedule. Last flown 2026-05-04.
91%
chance on time
- On time (history)
- 93%
- Cancelled
- 3.3%
- Avg arrival delay
- 7 min
- Arrived on time 93% of the time (29 flights, Jun 2025 to May 2026).
- Cancelled 3.3% of the time (1 of 30).
- Short track record (29 flights), so its score leans on the airline's record at this hour.
Limited track record · 29 flights
Find Frontier 1121 fares Opens this date on Aviasales#5 · Delta 1614
10:56 PM → 11:51 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
- On time (history)
- 86%
- Cancelled
- 0.6%
- Avg arrival delay
- 11 min
- Arrived on time 86% of the time (347 flights, Jun 2025 to May 2026).
Strong track record · 347 flights
Find Delta 1614 fares Opens this date on Aviasales#6 · Delta 1006
11:30 AM → 12:19 PM1h 49m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Delta 475; its record covers all of them.
80%
chance on time
- On time (history)
- 80%
- Cancelled
- 1.4%
- Avg arrival delay
- 12 min
- Arrived on time 80% of the time (145 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (9 AM to noon: 85% on time; Before 9 AM: 95%).
Moderate track record · 145 flights
Find Delta 1006 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)93%
304 flights · 95% on time as flown · 0.6% cancel
- Frontier Airlines89%
30 flights · 93% on time as flown · 1.4% cancel
- Delta Air Lines86%
906 flights · 87% on time as flown · 1.2% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM95%
152 flights · avg delay 5 min
- 9 AM to noon85%
372 flights · avg delay 10 min
- 3 to 6 PM92%
340 flights · avg delay 5 min
- After 9 PM86%
332 flights · avg delay 11 min
Best day: Tuesday (90%). Worst: Monday (86%).
Smarter routing
Nearby airports that run more on time
PVU → SNA 90% chance on time
Provo Municipal Airport to John Wayne Orange County International Airport · 409 flights a year · 72 mi from your airports · yours: 88%
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