United Airlines BOS to LAX on-time performance
United Airlines nonstop flights from Boston to Los Angeles · Aug 2025 – Jul 2026
On-time arrivals
77%
arrived < 15 min late
Cancelled
1.1%
8 flights
Avg arrival delay
17 min
67 min when late
Rank on route
#1 of 4
route average 75% on time
Key facts
- United Airlines flights on BOS to LAX arrived on time 77% of the time in Aug 2025 – Jul 2026.
- 1.1% were cancelled, and 8% arrived an hour or more late.
- That ranks #1 of 4 airlines on this route, which averaged 75% on time overall.
- The largest source of delay minutes was late-arriving aircraft (54%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft54%
- Airline (crew, maintenance, cleaning, fueling)25%
- Air traffic control & airport congestion20%
- Extreme weather2%
- Security0%
Other airlines on BOS to LAX
- JetBlue74% on time · 20 min avg delay
- Delta Air Lines76% on time · 19 min avg delay
- American Airlines74% on time · 26 min avg delay
Full BOS to LAX comparison →
United Airlines on-time record across all routes →
716 United Airlines flights tracked on this route; 8 cancelled, 2 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.