UA1665 · SFO → BOS

United Airlines · San Francisco to Boston · last 12 months · 343 flights tracked

83.7%on-time

UA1665 SFO→BOS: 83.7% on-time over 343 flights (last 12 months) — solid. It beats the route average (74.5%) by 9.2 points. Best day to fly: Tue (93.5%); worst: Sun (74.0%). Seasonality matters: Apr is the most reliable month (92.3%), Jan the worst (75.0%). Cancellation rate is 1.5% — have a backup plan. Average arrival delay: 8.2 minutes.

Data: US BTS, last 12 months.

8.2 minavg arrival delay

1.5%cancelled

0diverted

343flights tracked

Arrival delay distribution

Early/on time · 2451–60 min · 8061–180 min · 13180+ min · 0

On-time by day of week

Mon

80.4%

Tue

93.5%

Wed

86.4%

Thu

83.7%

Fri

84.6%

Sat

84.3%

Sun

74.0%

On-time by month

90.0%

Sep

87.1%

Oct

76.7%

Nov

82.1%

Dec

75.0%

Jan

85.7%

Feb

76.7%

Mar

92.3%

Apr

83.9%

May

76.7%

Jun

90.0%

Jul

87.1%

Aug

← All flights on SFO–BOS