DL509 · DTW → SFO

Delta Air Lines · Detroit to San Francisco · last 12 months · 138 flights tracked

51.8%on-time

DL509 DTW→SFO: 51.8% on-time over 138 flights (last 12 months) — below average. It trails the route average (66.4%) by 14.6 points. Best day to fly: Tue (75.0%); worst: Thu (45.5%). Seasonality matters: Feb is the most reliable month (67.9%), Jun the worst (21.4%). Average arrival delay: 45.5 minutes.

Data: US BTS, last 12 months.

45.5 minavg arrival delay

0.7%cancelled

0diverted

138flights tracked

Arrival delay distribution

Early/on time · 491–60 min · 6761–180 min · 15180+ min · 6

On-time by day of week

Mon

45.8%

Tue

75.0%

Wed

50.0%

Thu

45.5%

Fri

56.5%

Sat

50.0%

Sun

46.2%

On-time by month

0.0%

Dec

63.3%

Jan

67.9%

Feb

60.7%

Mar

40.0%

Apr

21.4%

Jun

44.4%

Jul

100.0%

Aug

← All flights on DTW–SFO