UA503 · BOS → ORD

United Airlines · Boston to Chicago O'Hare · last 12 months · 164 flights tracked

81.6%on-time

UA503 BOS→ORD: 81.6% on-time over 164 flights (last 12 months) — solid. It beats the route average (71.9%) by 9.7 points. Best day to fly: Sat (100.0%); worst: Mon (76.0%). Seasonality matters: Apr is the most reliable month (90.0%), Aug the worst (65.5%). Average arrival delay: 25.1 minutes.

Data: US BTS, last 12 months.

25.1 minavg arrival delay

0.0%cancelled

1diverted

164flights tracked

Arrival delay distribution

Early/on time · 1171–60 min · 3161–180 min · 11180+ min · 4

On-time by day of week

Mon

76.0%

Tue

80.0%

Wed

84.0%

Thu

84.0%

Fri

80.8%

Sat

100.0%

Sun

76.9%

On-time by month

73.1%

Mar

90.0%

Apr

84.6%

May

84.6%

Jun

88.9%

Jul

65.5%

Aug

← All flights on BOS–ORD