DL859 · BOS → SLC

Delta Air Lines · Boston to Salt Lake City · last 12 months · 365 flights tracked

87.2%on-time

DL859 BOS→SLC: 87.2% on-time over 365 flights (last 12 months) — excellent. It beats the route average (73.4%) by 13.8 points. Best day to fly: Mon (92.2%); worst: Sat (80.8%). Seasonality matters: Sep is the most reliable month (100.0%), Jan the worst (67.9%). Cancellation rate is 1.6% — have a backup plan. Average arrival delay: 7.6 minutes.

Data: US BTS, last 12 months.

7.6 minavg arrival delay

1.6%cancelled

0diverted

365flights tracked

Arrival delay distribution

Early/on time · 2431–60 min · 10861–180 min · 6180+ min · 2

On-time by day of week

Mon

92.2%

Tue

88.0%

Wed

92.0%

Thu

84.6%

Fri

90.4%

Sat

80.8%

Sun

82.7%

On-time by month

100.0%

Sep

93.5%

Oct

86.7%

Nov

77.4%

Dec

67.9%

Jan

76.9%

Feb

93.5%

Mar

90.0%

Apr

86.7%

May

83.3%

Jun

96.8%

Jul

90.3%

Aug

← All flights on BOS–SLC