DL977 · BOS → SFO

Delta Air Lines · Boston to San Francisco · last 12 months · 234 flights tracked

80.3%on-time

DL977 BOS→SFO: 80.3% on-time over 234 flights (last 12 months) — solid. It beats the route average (69.2%) by 11.1 points. Best day to fly: Sun (93.5%); worst: Fri (72.2%). Seasonality matters: Apr is the most reliable month (88.9%), Dec the worst (60.0%). Cancellation rate is 2.1% — have a backup plan. Average arrival delay: 12.6 minutes.

Data: US BTS, last 12 months.

12.6 minavg arrival delay

2.1%cancelled

0diverted

234flights tracked

Arrival delay distribution

Early/on time · 1231–60 min · 9561–180 min · 8180+ min · 3

On-time by day of week

Mon

77.1%

Tue

74.3%

Wed

80.6%

Thu

88.9%

Fri

72.2%

Sat

75.0%

Sun

93.5%

On-time by month

60.0%

Dec

72.7%

Jan

85.0%

Feb

88.9%

Mar

88.9%

Apr

87.1%

May

73.3%

Jun

80.6%

Jul

74.2%

Aug

← All flights on BOS–SFO