DL474 · SEA → BOS

Delta Air Lines · Seattle to Boston · last 12 months · 228 flights tracked

67.3%on-time

DL474 SEA→BOS: 67.3% on-time over 228 flights (last 12 months) — average. It trails the route average (75.1%) by 7.8 points. Best day to fly: Fri (72.2%); worst: Sun (57.1%). Seasonality matters: May is the most reliable month (96.0%), Jun the worst (48.0%). Cancellation rate is 1.8% — have a backup plan. Average arrival delay: 27.3 minutes.

Data: US BTS, last 12 months.

27.3 minavg arrival delay

1.8%cancelled

4diverted

228flights tracked

Arrival delay distribution

Early/on time · 1021–60 min · 9361–180 min · 14180+ min · 11

On-time by day of week

Mon

65.8%

Tue

71.4%

Wed

69.7%

Thu

63.2%

Fri

72.2%

Sat

100.0%

Sun

57.1%

On-time by month

58.8%

Sep

64.0%

Oct

58.3%

Nov

81.8%

Dec

71.4%

Mar

69.2%

Apr

96.0%

May

48.0%

Jun

68.0%

Jul

52.0%

Aug

← All flights on SEA–BOS