UA1231 · ORD → IAH

United Airlines · Chicago O'Hare to Houston · last 12 months · 270 flights tracked

91.4%on-time

UA1231 ORD→IAH: 91.4% on-time over 270 flights (last 12 months) — excellent. It beats the route average (76.0%) by 15.4 points. Best day to fly: Tue (97.4%); worst: Fri (81.6%). Seasonality matters: Aug is the most reliable month (96.7%), Mar the worst (83.3%). Cancellation rate is 1.5% — have a backup plan. Average arrival delay: 6.4 minutes.

Data: US BTS, last 12 months.

6.4 minavg arrival delay

1.5%cancelled

0diverted

270flights tracked

Arrival delay distribution

Early/on time · 2181–60 min · 4361–180 min · 3180+ min · 2

On-time by day of week

Mon

94.9%

Tue

97.4%

Wed

97.3%

Thu

94.6%

Fri

81.6%

Sat

84.2%

Sun

89.7%

On-time by month

100.0%

Oct

93.1%

Nov

90.0%

Dec

100.0%

Jan

88.2%

Feb

83.3%

Mar

86.2%

Apr

93.5%

May

96.7%

Jun

90.0%

Jul

96.7%

Aug

← All flights on ORD–IAH