78% of flights from Sacramento to Las Vegas arrived on time over the past 12 months. That is about the typical U.S. route. The 5 a.m. departures ran on time 96% of the time; the 4 p.m. ones 56%. Most reliable airline: Delta Air Lines (90%). 7% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for SMF → LAS: when a flight was late, it was under 45 minutes late 59% of the time. About 1 in 16 flights landed an hour or more late, and 1 in 167 three hours or more; 0.6% were cancelled outright.
- On time or early78%
- 15–30 min late8.0%
- 30–60 min late6.7%
- 1–2 hours late4.3%
- 2–3 hours late1.3%
- 3+ hours late0.6%
- Diverted0.1%
- Cancelled0.6%
Share of all 4,009 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| Southwest Airlines | 3,464 | 77% | 0.5% | −4 min | 6.3% | +54 min | Southwest Airlines |
| Delta Air Lines | 241 | 90% | 2.5% | −12 min | 3.3% | +83 min | SkyWest |
| Frontier Airlines | 236 | 75% | 1.3% | −5 min | 11.0% | +72 min | Frontier Airlines |
| Spirit Airlines | 68 | — | — | — | — | — | Spirit Airlines |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at SMF). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | Southwest Airlines | Delta Air Lines |
|---|---|---|
| 5 a.m. | 96% | — |
| 6 a.m. | 95% | — |
| 7 a.m. | 90% | — |
| 8 a.m. | 94% | 94% |
| 9 a.m. | 91% | — |
| 10 a.m. | 87% | — |
| 11 a.m. | 81% | — |
| noon | 68% | — |
| 1 p.m. | 73% | — |
| 2 p.m. | 71% | — |
| 3 p.m. | 74% | — |
| 4 p.m. | 54% | — |
| 5 p.m. | 72% | — |
| 6 p.m. | 56% | — |
| 7 p.m. | 69% | — |
| 8 p.m. | 76% | — |
| 9 p.m. | 58% | — |
Last flight of the day
On SMF → LAS, each airline's last flight of the day was cancelled 1.2% of the time, against 0.5% for its earlier flights (2.3× as often). It arrived 3+ hours late 0.4% of the time (earlier flights: 0.5%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.
| Airline | Last departure | Last: cancelled | Last: 3h+ late | Earlier: cancelled | Next morning |
|---|---|---|---|---|---|
| Delta Air Lines | — | 3.7% | 1.8% | 1.8% | — |
| Southwest Airlines | 8:45 p.m. | 0.5% | 0.0% | 0.5% | first flight 5:25 a.m. |
Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.
If you need to be in LAS tonight, book an earlier flight so there's a backup if it's cancelled.
By month
Each calendar month pooled over 2023–2026. Best: November (85%). Worst: July (74%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 640 | 78% | 0.6% |
| Tuesday | 514 | 82% | 0.0% |
| Wednesday | 506 | 87% | 0.2% |
| Thursday | 625 | 72% | 0.5% |
| Friday | 640 | 71% | 1.4% |
| Saturday | 431 | 84% | 0.9% |
| Sunday | 653 | 79% | 0.8% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: air traffic/airport 11 · airline 8 · weather 7
Month by month
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Jan 1, 2026 | 9 | 11% | 0 |
| Mar 3, 2026 | 8 | 25% | 0 |
| Apr 17, 2026 | 13 | 31% | 0 |
| Aug 14, 2026 | 12 | 33% | 2 |
| Aug 13, 2026 | 12 | 33% | 0 |
Questions
How often are flights from SMF to LAS on time?
78% of 4,009 scheduled flights from Sacramento, CA to Las Vegas, NV arrived within 15 minutes of schedule between September 2025 and August 2026. 0.7% were cancelled.
What is the best time of day to fly SMF to LAS?
Flights scheduled to leave at 5 a.m. were the most reliable (96% on time). The 4 p.m. departures were the least (56%).
Which airline is most on time from SMF to LAS?
Delta Air Lines: 90% of its 241 flights on the route arrived on time. Southwest Airlines: 77%. Frontier Airlines: 75%.
What month has the most delays from SMF to LAS?
July (74% on time). The best month is November (85%), over 2023–2026.
Is the last flight of the day from SMF to LAS more likely to be cancelled?
Yes. Each airline's last SMF–LAS flight of the day was cancelled 1.2% of the time over the past year, against 0.5% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.
Related
- LAS → SMF (return)
- Sacramento (SMF) delays by hour
- Flights into Las Vegas Harry Reid (LAS)
- Southwest Airlines on-time record
- Delta Air Lines on-time record
- Frontier Airlines on-time record
- Spirit Airlines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.