About 1 in 2 AA 866 flights from Chicago arrived 15+ minutes late, diverted or cancelled over the past year (41%); 0.7% were cancelled. The typical flight landed 5 minutes late.
AA 866: ORD → PHX
Scheduled to leave Chicago at 10:22 a.m. local time. Over the past year it arrived on time 59% of the time (149 flights), worse than other AA flights on the route at that hour (70%). Last seen in the data Aug 4, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 22 | 36% |
| Tuesday | 23 | 78% |
| Wednesday | 21 | 67% |
| Thursday | 21 | 43% |
| Friday | 21 | 52% |
| Saturday | 21 | 71% |
| Sunday | 20 | 65% |
Why it was late
All flights ORD → PHX · Connecting off AA 866? Check the risk
Questions
How often is AA 866 from ORD to PHX late?
American Airlines 866 from Chicago, IL to Phoenix, AZ arrived 15 or more minutes late, was diverted or was cancelled on 41% of 149 scheduled flights between September 2025 and August 2026. 0.7% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check American Airlines for today's flight. Method.