Skip to content
WanderNerd
Check a flight

Airport Reliability

ORD · Chicago

Chicago O'Hare International Airport

73%
Departures within 15 minutes
21 min
Average departure delay
73%
Arrivals within 15 minutes
2.5%
Departures cancelled

Based on 381,399 departures and 381,348 arrivals. Data through May 2026.

What the data says

Morning-you made the right choice.

Departures from ORD departing between 3–6 AM arrived on time 88% of the time, versus 62% between 6–9 PM.

Sunday scaries are real for this one.

Departures from ORD arrived on time 75% of the time on Tuesdays. On Sundays: 68%.

Ticking up lately.

Departures from ORD arrived on time 71% of the time over the last three months in the data, compared with 68% in the three months before that.

When ORD gets messy

On-time by departure window
  • 12–3 AM72%(144 flights)
  • 3–6 AM88%(2999 flights)
  • 6–9 AM83%(68098 flights)
  • 9 AM–12 PM76%(72850 flights)
  • 12–3 PM72%(69443 flights)
  • 3–6 PM65%(60790 flights)
  • 6–9 PM62%(72756 flights)
  • 9 PM–12 AM64%(23660 flights)
On-time by weekday
  • Mon69%(54423 flights)
  • Tue75%(51202 flights)
  • Wed73%(51868 flights)
  • Thu73%(54564 flights)
  • Fri69%(54595 flights)
  • Sat73%(48812 flights)
  • Sun68%(55276 flights)
On-time trend by month
76%
May

Jun 70% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%31330
July 202565%31449
August 202575%31163
September 202580%30730
October 202576%33076
November 202573%28841
December 202561%29028
January 202668%26119
February 202674%27135
March 202666%31537
April 202670%34179
May 202676%36153

Airlines departing ORD

Busiest routes from ORD

Based on 381,399 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.