DL639 · LAX → BOS

Delta Air Lines · Los Angeles to Boston · last 12 months · 365 flights tracked

81.6%on-time

DL639 LAX→BOS: 81.6% on-time over 365 flights (last 12 months) — solid. It beats the route average (76.2%) by 5.4 points. Best day to fly: Fri (90.4%); worst: Sat (70.6%). Seasonality matters: May is the most reliable month (93.5%), Mar the worst (70.0%). Cancellation rate is 3.0% — have a backup plan. Average arrival delay: 15.7 minutes.

Data: US BTS, last 12 months.

15.7 minavg arrival delay

3.0%cancelled

0diverted

365flights tracked

Arrival delay distribution

Early/on time · 2261–60 min · 10761–180 min · 9180+ min · 12

On-time by day of week

Mon

82.0%

Tue

81.6%

Wed

80.4%

Thu

86.5%

Fri

90.4%

Sat

70.6%

Sun

79.6%

On-time by month

73.3%

Sep

71.0%

Oct

75.0%

Nov

86.7%

Dec

85.7%

Jan

74.1%

Feb

70.0%

Mar

80.0%

Apr

93.5%

May

90.0%

Jun

89.7%

Jul

90.0%

Aug

← All flights on LAX–BOS