DL438 · SEA → BOS

Delta Air Lines · Seattle to Boston · last 12 months · 80 flights tracked

56.2%on-time

DL438 SEA→BOS: 56.2% on-time over 80 flights (last 12 months) — below average. It trails the route average (75.1%) by 18.9 points. Best day to fly: Wed (72.7%); worst: Sat (41.7%). Seasonality matters: Jun is the most reliable month (71.4%), Aug the worst (48.4%). Average arrival delay: 37.0 minutes.

Data: US BTS, last 12 months.

37.0 minavg arrival delay

0.0%cancelled

0diverted

80flights tracked

Arrival delay distribution

Early/on time · 341–60 min · 3061–180 min · 12180+ min · 4

On-time by day of week

Mon

50.0%

Tue

45.5%

Wed

72.7%

Thu

54.5%

Fri

63.6%

Sat

41.7%

Sun

66.7%

On-time by month

71.4%

Jun

53.6%

Jul

48.4%

Aug

← All flights on SEA–BOS