Boston (BOS) to Las Vegas (LAS): On-Time Performance
Data through July 2026
When you fly BOS to LAS matters as much as anything else about the booking: the route swung from 94% on-time in October 2024 to just 48% in February 2025. Across the full period the route averages 78% on-time against a national 78%. Morning departures also hold up better than evening ones (83% vs 70%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 0.8%
- Flights/day
- 4.4
- last 12 months
- Duration
- 6h 1m
- scheduled
- Distance
- 2,381 mi
Best airline from BOS to LAS
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 78% | 14 min | 0.9% | 1,293 |
| JetBlue Airways | 77% | 16 min | 0.8% | 2,245 |
Monthly on-time trend
Best time to fly from BOS to LAS
Aim for departures around 6 a.m. (93% on-time); avoid 8 p.m. departures (62%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 77% | 16 min |
| Tuesdaybest | 81% | 14 min |
| Wednesday | 81% | 12 min |
| Thursday | 76% | 17 min |
| Friday | 77% | 13 min |
| Saturday | 80% | 14 min |
| Sunday | 74% | 18 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft32%
- Airline operations36%
- National airspace system29%
- Weather3%
Frequently asked questions
- How often are flights from BOS to LAS delayed?
- 22% of BOS–LAS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 15 minutes.
- Which airline is most reliable from BOS to LAS?
- Delta Air Lines has the best on-time record on this route at 78%, based on 1,293 flights. 2 airlines flew BOS–LAS frequently enough to compare in this period.
- What is the best time of day to fly from BOS to LAS?
- Departures around 6 a.m. have the best record (93% on-time), while departures around 8 p.m. have the worst (62%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BOS to LAS?
- The scheduled BOS–LAS flight time averages 6h 1m over 2,381 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are BOS to LAS flights cancelled?
- 0.8% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from BOS to LAS?
- February 2025 was the roughest month in this dataset, with only 48% of arrivals on time. The best was October 2024 at 94%. If your dates are flexible, that 47-point gap is worth planning around.
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Based on 3,538 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.