UA721 · BOS → IAD

United Airlines · Boston to Washington Dulles · last 12 months · 365 flights tracked

76.6%on-time

UA721 BOS→IAD: 76.6% on-time over 365 flights (last 12 months) — solid. It trails the route average (83.2%) by 6.6 points. Best day to fly: Tue (84.0%); worst: Wed (68.0%). Seasonality matters: Apr is the most reliable month (93.3%), Oct the worst (56.7%). Cancellation rate is 2.7% — have a backup plan. Average arrival delay: 22.2 minutes.

Data: US BTS, last 12 months.

22.2 minavg arrival delay

2.7%cancelled

1diverted

365flights tracked

Arrival delay distribution

Early/on time · 1961–60 min · 12561–180 min · 25180+ min · 8

On-time by day of week

Mon

80.4%

Tue

84.0%

Wed

68.0%

Thu

82.4%

Fri

69.2%

Sat

82.0%

Sun

70.0%

On-time by month

75.0%

Sep

56.7%

Oct

69.0%

Nov

77.4%

Dec

75.9%

Jan

88.5%

Feb

80.6%

Mar

93.3%

Apr

83.9%

May

73.3%

Jun

72.4%

Jul

71.0%

Aug

← All flights on BOS–IAD