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.
SJC → LAS
San Jose to Las Vegas: 3,941 nonstop flights a year
On time (12 months)
80%
Cancelled
0.6%
avg delay 13 min
Best time to leave
Before 9 AM
96% on time vs 66% after 9 PM
Most reliable airline
Spirit
86% 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 · Southwest 3568
6:15 AM → 7:50 AM1h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 956; its record covers all of them.
97%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (69 flights, Jun 2025 to May 2026).
- Never cancelled in 69 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; After 9 PM: 66%).
Moderate track record · 69 flights
Find Southwest 3568 fares Opens this date on Aviasales#2 · Southwest 3079
7:00 AM → 8:30 AM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-30.
95%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; After 9 PM: 66%).
- Short track record (31 flights), so its score leans on the airline's record at this hour.
Limited track record · 31 flights
Find Southwest 3079 fares Opens this date on Aviasales#3 · Southwest 771
6:30 AM → 8:05 AM1h 30m nonstop
Local times, typical schedule. Last flown 2026-04-05.
94%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (18 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; After 9 PM: 66%).
- Short track record (18 flights), so its score leans on the airline's record at this hour.
Limited track record · 18 flights
Find Southwest 771 fares Opens this date on Aviasales#4 · Southwest 1698
8:05 AM → 9:35 AM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
94%
chance on time
- On time (history)
- 98%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 98% of the time (46 flights, Jun 2025 to May 2026).
- Never cancelled in 46 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; After 9 PM: 66%).
- Short track record (46 flights), so its score leans on the airline's record at this hour.
Limited track record · 46 flights
Find Southwest 1698 fares Opens this date on Aviasales#5 · Southwest 3015
8:55 AM → 10:25 AM1h 30m nonstop
Local times, typical schedule. Last flown 2026-04-06.
93%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (15 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; After 9 PM: 66%).
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Southwest 3015 fares Opens this date on Aviasales#6 · Southwest 2064
7:40 AM → 9:10 AM1h 30m nonstop
Local times, typical schedule. Last flown 2026-04-06.
92%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 93% of the time (15 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; After 9 PM: 66%).
- Short track record (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Southwest 2064 fares Opens this date on Aviasales#7 · Southwest 2551
10:45 AM → 12:15 PM1h 30m nonstop
Local times, typical schedule. Last flown 2026-04-06.
90%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (23 flights, Jun 2025 to May 2026).
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 2551 fares Opens this date on Aviasales#8 · Southwest 2134
10:25 AM → 12:00 PM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 94%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 94% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (47 flights), so its score leans on the airline's record at this hour.
Limited track record · 47 flights
Find Southwest 2134 fares Opens this date on Aviasales#9 · Southwest 3661
10:55 AM → 12:25 PM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-30.
88%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 3661 fares Opens this date on Aviasales#10 · Southwest 1106
9:30 AM → 11:00 AM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-30.
86%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 82% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find Southwest 1106 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Spirit Airlines86%
267 flights · 87% on time as flown · 0.4% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)80%
232 flights · 80% on time as flown · 0.2% cancel
- Southwest Airlines79%
3,261 flights · 80% on time as flown · 0.6% cancel
- Frontier Airlines70%
179 flights · 68% on time as flown · 1.5% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM96%
890 flights · avg delay 2 min
- 9 AM to noon88%
669 flights · avg delay 6 min
- Noon to 3 PM77%
841 flights · avg delay 17 min
- 3 to 6 PM70%
755 flights · avg delay 20 min
- 6 to 9 PM66%
622 flights · avg delay 20 min
- After 9 PM66%
164 flights · avg delay 18 min
Best day: Tuesday (88%). Worst: Thursday (74%).
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