Best Time to Fly BOS to LAX: On-Time Stats by Hour & Airline
Logan International → Los Angeles International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 75.1% of Boston (BOS) to Los Angeles (LAX) flights arrived on time (4,758 scheduled flights). That is 2.6 points below the national average of 77.6%.
Among 4 airlines, United Airlines led with 76.8% on time and American Airlines was last with 73.9%.
Over 24 months, Wednesday was the most reliable day (81% on time) and February the worst month (65%).
The cancellation rate was 1.7% (US average 1.8%).
BOS to LAX on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 76.8% | 67 min | 1.1% | 716 |
| Delta Air Lines | 76.0% | 76 min | 1.9% | 1,234 |
| JetBlue | 74.4% | 72 min | 1.8% | 1,629 |
| American Airlines | 73.9% | 97 min | 1.6% | 1,179 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BOS to LAX
On-time arrival % by scheduled departure hour (local time), 9,516 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 91.7% | 0.0% | 48 |
| 6am–7am | 86.9% | 0.8% | 1,063 |
| 7am–8am | 84.9% | 0.9% | 1,141 |
| 8am–9am | 84.0% | 0.5% | 1,217 |
| 9am–10am | 79.3% | 1.7% | 346 |
| 10am–11am | 84.7% | 0.6% | 705 |
| 11am–12pm | 77.5% | 1.4% | 275 |
| 12pm–1pm | 81.4% | 0.9% | 337 |
| 1pm–2pm | 77.1% | 1.7% | 120 |
| 2pm–3pm | 73.7% | 1.9% | 314 |
| 3pm–4pm | 79.5% | 1.6% | 188 |
| 4pm–5pm | 76.8% | 1.0% | 485 |
| 5pm–6pm | 70.2% | 1.6% | 773 |
| 6pm–7pm | 71.0% | 0.4% | 1,368 |
| 7pm–8pm | 60.3% | 3.5% | 201 |
| 8pm–9pm | 66.3% | 1.2% | 761 |
| 9pm–10pm | 64.7% | 0.6% | 171 |
| 10pm–11pm | Limited data | 3 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BOS to LAX
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 79.5% | -0.5 pts | 0.5% | 186 |
| Christmas & New Year (Dec 20 - Jan 3) | 58.2% | -21.7 pts | 1.1% | 365 |
| Summer peak (Jun 15 - Aug 15) | 74.1% | -5.8 pts | 1.1% | 1,823 |
| All other days | 79.9% | — | 0.9% | 7,142 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).