UA639 · BOS → LAX

United Airlines · Boston to Los Angeles · last 12 months · 143 flights tracked

64.1%on-time

UA639 BOS→LAX: 64.1% on-time over 143 flights (last 12 months) — below average. It trails the route average (73.7%) by 9.6 points. Best day to fly: Sat (83.3%); worst: Thu (52.2%). Seasonality matters: Apr is the most reliable month (80.8%), Jun the worst (50.0%). Average arrival delay: 25.8 minutes.

Data: US BTS, last 12 months.

25.8 minavg arrival delay

0.0%cancelled

1diverted

143flights tracked

Arrival delay distribution

Early/on time · 651–60 min · 5661–180 min · 18180+ min · 3

On-time by day of week

Mon

65.2%

Tue

71.4%

Wed

68.4%

Thu

52.2%

Fri

60.9%

Sat

83.3%

Sun

54.5%

On-time by month

75.0%

Mar

80.8%

Apr

67.7%

May

50.0%

Jun

53.3%

Jul

60.0%

Aug

← All flights on BOS–LAX