DL1015 · IAD → SEA

Delta Air Lines · Washington Dulles to Seattle · last 12 months · 349 flights tracked

77.0%on-time

DL1015 IAD→SEA: 77.0% on-time over 349 flights (last 12 months) — solid. It trails the route average (77.7%) by 0.7 points. Best day to fly: Mon (86.0%); worst: Thu (70.0%). Seasonality matters: Apr is the most reliable month (93.1%), Dec the worst (42.1%). Average arrival delay: 22.1 minutes.

Data: US BTS, last 12 months.

22.1 minavg arrival delay

1.1%cancelled

1diverted

349flights tracked

Arrival delay distribution

Early/on time · 2011–60 min · 11661–180 min · 17180+ min · 10

On-time by day of week

Mon

86.0%

Tue

70.0%

Wed

76.0%

Thu

70.0%

Fri

77.6%

Sat

80.9%

Sun

79.2%

On-time by month

90.0%

Sep

83.9%

Oct

73.3%

Nov

42.1%

Dec

65.4%

Jan

77.8%

Feb

43.3%

Mar

93.1%

Apr

90.3%

May

76.7%

Jun

87.1%

Jul

83.9%

Aug

← All flights on IAD–SEA