Boise (BOI) to Las Vegas (LAS): On-Time Performance
Data through May 2026
When you fly BOI to LAS matters as much as anything else about the booking: the route swung from 92% on-time in November 2024 to just 74% in September 2025. Across the full period the route averages 82% on-time against a national 78%. Morning departures also hold up better than evening ones (93% vs 72%), which matters most in the rough months.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 0.4%
- Flights/day
- 3.9
- last 12 months
- Duration
- 1h 51m
- scheduled
- Distance
- 519 mi
Best airline from BOI to LAS
5 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Alaska Airlinesmost reliable | 92% | 7 min | 0.0% | 71 |
| Southwest Airlines | 84% | 10 min | 0.1% | 2,066 |
| SkyWest Airlines | 79% | 14 min | 0.3% | 323 |
| Spirit Airlines | 79% | 15 min | 1.8% | 433 |
| Allegiant Air | 67% | 108 min | 0.0% | 60 |
Monthly on-time trend
Best time to fly from BOI to LAS
Aim for departures around 5 a.m. (100% on-time); avoid 6 p.m. departures (64%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 78% | 12 min |
| Tuesday | 88% | 7 min |
| Wednesday | 88% | 7 min |
| Thursday | 79% | 13 min |
| Friday | 76% | 20 min |
| Saturdaybest | 89% | 8 min |
| Sunday | 82% | 20 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft52%
- Airline operations15%
- National airspace system29%
- Weather4%
Frequently asked questions
- How often are flights from BOI to LAS delayed?
- 18% of BOI–LAS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from BOI to LAS?
- Alaska Airlines has the best on-time record on this route at 92%, based on 71 flights. 5 airlines flew BOI–LAS frequently enough to compare in this period.
- What is the best time of day to fly from BOI to LAS?
- Departures around 5 a.m. have the best record (100% on-time), while departures around 6 p.m. have the worst (64%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BOI to LAS?
- The scheduled BOI–LAS flight time averages 1h 51m over 519 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are BOI to LAS flights cancelled?
- 0.4% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from BOI to LAS?
- September 2025 was the roughest month in this dataset, with only 74% of arrivals on time. The best was November 2024 at 92%. If your dates are flexible, that 18-point gap is worth planning around.
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Based on 2,953 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.