Route on-time record

SAN to LAS: most on-time flights and the best time to fly

San Diego (San Diego International Airport) to Las Vegas (Harry Reid International Airport). 6,129 nonstop flights in Jun 2025 to May 2026, 76% arrived within 15 minutes and 1.2% were cancelled. The most reliable flight number was Southwest 667 at 6:30 AM.

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

SAN → LAS

San Diego to Las Vegas: 6,129 nonstop flights a year

On time (12 months)

76%

Cancelled

1.2%

avg delay 16 min

Best time to leave

Before 9 AM

91% on time vs 66% 6 to 9 PM

Most reliable airline

Spirit

82% chance on time

Check SAN to LAS fares

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 667
6:30 AM → 8:05 AM1h 35m nonstop
Local times, typical schedule. Last flown 2026-04-06.
94%
chance on time
On time (history)
100%
Cancelled
0.0%
Avg arrival delay
1 min
- Arrived on time 100% of the time (28 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 66%).
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- Short track record (28 flights), so its score leans on the airline's record at this hour.
Limited track record · 28 flights
Find Southwest 667 fares Opens this date on Aviasales
#2 · Southwest 3369
6:45 AM → 8:10 AM1h 25m 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 (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 66%).
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
Limited track record · 55 flights
Find Southwest 3369 fares Opens this date on Aviasales
#3 · Southwest 3966
7:10 AM → 8:45 AM1h 35m nonstop
Local times, typical schedule. Last flown 2026-04-06.
92%
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: 91% on time; 6 to 9 PM: 66%).
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- Short track record (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Southwest 3966 fares Opens this date on Aviasales
#4 · Southwest 353
7:50 AM → 9:15 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-04-06.
91%
chance on time
On time (history)
94%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 94% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 66%).
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
Limited track record · 33 flights
Find Southwest 353 fares Opens this date on Aviasales
#5 · Southwest 1660
8:05 AM → 9:30 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
On time (history)
93%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 93% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 66%).
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
Limited track record · 54 flights
Find Southwest 1660 fares Opens this date on Aviasales
#6 · SkyWest 3741 · sold as United Express, Delta Connection, American Eagle or Alaska
7:40 AM → 9:16 AM1h 36m nonstop
Local times, typical schedule. Last flown 2026-04-12.
85%
chance on time
On time (history)
84%
Cancelled
0.0%
Avg arrival delay
19 min
- Arrived on time 84% of the time (239 flights, Jun 2025 to May 2026).
- Never cancelled in 239 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 66%).
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
Strong track record · 239 flights
Find 7:40 AM flight fares Opens this date on Aviasales
#7 · Southwest 200
9:35 AM → 11:00 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
On time (history)
85%
Cancelled
0.0%
Avg arrival delay
10 min
- Arrived on time 85% of the time (46 flights, Jun 2025 to May 2026).
- Never cancelled in 46 scheduled flights.
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
Limited track record · 46 flights
Find Southwest 200 fares Opens this date on Aviasales
#8 · SkyWest 3029 · sold as United Express, Delta Connection, American Eagle or Alaska
8:15 AM → 9:53 AM1h 38m nonstop
Local times, typical schedule. Last flown 2026-04-21.
84%
chance on time
On time (history)
85%
Cancelled
0.0%
Avg arrival delay
10 min
- Arrived on time 85% of the time (34 flights, Jun 2025 to May 2026).
- Never cancelled in 34 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 66%).
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
Limited track record · 34 flights
Find 8:15 AM flight fares Opens this date on Aviasales
#9 · Southwest 950
10:15 AM → 11:45 AM1h 30m nonstop
Local times, typical schedule. Last flown 2026-04-06.
81%
chance on time
On time (history)
89%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 89% of the time (28 flights, Jun 2025 to May 2026).
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- 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 (28 flights), so its score leans on the airline's record at this hour.
Limited track record · 28 flights
Find Southwest 950 fares Opens this date on Aviasales
#10 · Southwest 383
9:45 AM → 11:15 AM1h 30m nonstop
Local times, typical schedule. Last flown 2026-04-05.
80%
chance on time
On time (history)
77%
Cancelled
0.0%
Avg arrival delay
9 min
- Arrived on time 77% of the time (13 flights, Jun 2025 to May 2026).
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- 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 (13 flights), so its score leans on the airline's record at this hour.
Limited track record · 13 flights
Find Southwest 383 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

Spirit Airlines82%
348 flights · 84% on time as flown · 1.6% cancel
SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)76%
1,653 flights · 77% on time as flown · 1.3% cancel
Southwest Airlines75%
3,725 flights · 75% on time as flown · 1.1% cancel
Frontier Airlines64%
403 flights · 63% on time as flown · 2.1% cancel

On time by departure time

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

Before 9 AM91%
1,322 flights · avg delay 6 min
9 AM to noon84%
956 flights · avg delay 11 min
Noon to 3 PM67%
1,171 flights · avg delay 22 min
3 to 6 PM70%
1,103 flights · avg delay 19 min
6 to 9 PM66%
1,215 flights · avg delay 23 min
After 9 PM73%
362 flights · avg delay 19 min

Best day: Tuesday (84%). Worst: Friday (66%).

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.

What delays this route

Late-arriving aircraft50%
Air traffic control and airport volume23%
Airline (crew, maintenance, boarding)22%
Severe weather4%

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

SAN to LAS questions

What time of day is best to fly SAN to LAS?: Before 9 AM: 91% of flights arrived on time, against 66% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from SAN to LAS?: Spirit, with a season-adjusted 82% chance of operating and arriving on time over 348 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 SAN to LAS?: October (69% on time); the best was January (82%), 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 SAN

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