Las Vegas (LAS) to Boston (BOS): On-Time Performance
Data through July 2026
The calendar drives reliability on LAS–BOS. April 2025 flights landed on schedule 92% of the time, but July 2026 dropped to 56% — a gap of 36 points. Across the full period the route averages 77% on-time against a national 78%.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 19 min
- completed flights
- Cancelled
- 1.0%
- Flights/day
- 4.4
- last 12 months
- Duration
- 5h 10m
- scheduled
- Distance
- 2,381 mi
Best airline from LAS to BOS
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| JetBlue Airwaysmost reliable | 77% | 20 min | 1.0% | 2,246 |
| Delta Air Lines | 77% | 17 min | 1.1% | 1,292 |
Monthly on-time trend
Best time to fly from LAS to BOS
Aim for departures around 1 p.m. (89% on-time); avoid 9 a.m. departures (68%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 21 min |
| Tuesdaybest | 84% | 14 min |
| Wednesday | 82% | 13 min |
| Thursday | 72% | 23 min |
| Friday | 79% | 15 min |
| Saturday | 81% | 20 min |
| Sunday | 70% | 26 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft33%
- Airline operations34%
- National airspace system31%
- Weather2%
Frequently asked questions
- How often are flights from LAS to BOS delayed?
- 23% of LAS–BOS 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 19 minutes.
- Which airline is most reliable from LAS to BOS?
- JetBlue Airways has the best on-time record on this route at 77%, based on 2,246 flights. 2 airlines flew LAS–BOS frequently enough to compare in this period.
- What is the best time of day to fly from LAS to BOS?
- Departures around 1 p.m. have the best record (89% on-time), while departures around 9 a.m. have the worst (68%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from LAS to BOS?
- The scheduled LAS–BOS flight time averages 5h 10m over 2,381 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are LAS to BOS flights cancelled?
- 1% 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 LAS to BOS?
- July 2026 was the roughest month in this dataset, with only 56% of arrivals on time. The best was April 2025 at 92%. If your dates are flexible, that 36-point gap is worth planning around.
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Based on 3,539 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.