UA1639 · MIA → ORD

United Airlines · Miami to Chicago O'Hare · last 12 months · 53 flights tracked

43.1%on-time

UA1639 MIA→ORD: 43.1% on-time over 53 flights (last 12 months) — below average. It trails the route average (71.1%) by 28.0 points. Best day to fly: Thu (57.1%); worst: Sun (36.4%). Seasonality matters: Jan is the most reliable month (72.7%), Mar the worst (27.8%). Cancellation rate is 3.8% — have a backup plan. Average arrival delay: 35.4 minutes.

Data: US BTS, last 12 months.

35.4 minavg arrival delay

3.8%cancelled

0diverted

53flights tracked

Arrival delay distribution

Early/on time · 121–60 min · 3061–180 min · 6180+ min · 3

On-time by day of week

Mon

37.5%

Thu

57.1%

Fri

42.9%

Sat

25.0%

Sun

36.4%

On-time by month

62.5%

Dec

72.7%

Jan

28.6%

Feb

27.8%

Mar

← All flights on MIA–ORD