Based on 7835 flights from 05/01/2008 to 05/31/2009
51%
On Time
10%
5-20 min. Delay
35%
>20 min. Delay
4%
Cancelled/Diverted
Average
(median)
Be Prepared For
(85th percentile)
Cancelled
or diverted
In Good Weather...
3 min. early
67 min. late
3%
In Bad Weather...
8 min. late
97 min. late
6%
In Fog... (6%)
36 min. late
2.4 hrs. late
14%
In Rain... (39%)
10 min. late
101 min. late
4%
In Snow... (19%)
9 min. late
101 min. late
9%
In Thunder... (13%)
13 min. late
98 min. late
5%
“Be Prepared For”
gives the longest delay you can reasonably expect to occur.
Only the unluckiest 15 percent of flights experience longer delays.
Current weather is 41.0 F (5.0 C) and Overcast, 86% humidity, and 10.00 miles visibility at CHICAGO OHARE INTL AP, US, IL as of Sun, 14 Mar 2010 04:51:00 -0500.