UA421 · DEN → IAD

United Airlines · Denver to Washington Dulles · last 12 months · 103 flights tracked

69.9%on-time

UA421 DEN→IAD: 69.9% on-time over 103 flights (last 12 months) — average. It trails the route average (81.8%) by 11.9 points. Best day to fly: Wed (85.7%); worst: Mon (53.3%). Seasonality matters: May is the most reliable month (100.0%), Jul the worst (54.8%). Average arrival delay: 17.2 minutes.

Data: US BTS, last 12 months.

17.2 minavg arrival delay

0.0%cancelled

0diverted

103flights tracked

Arrival delay distribution

Early/on time · 521–60 min · 3861–180 min · 13180+ min · 0

On-time by day of week

Mon

53.3%

Tue

64.3%

Wed

85.7%

Thu

80.0%

Fri

80.0%

Sat

66.7%

Sun

60.0%

On-time by month

100.0%

May

73.3%

Jun

54.8%

Jul

71.0%

Aug

← All flights on DEN–IAD