About 1 in 7 AA 3638 flights from Cincinnati arrived 15+ minutes late, diverted or cancelled over the past year (14%); 0.6% were cancelled. The typical flight landed 6 minutes early.
AA 3638: CVG → MIA
Scheduled to leave Cincinnati at 8:41 a.m. local time, operated by Envoy as MQ 3638. Over the past year it arrived on time 86% of the time (333 flights), in line with other AA flights on the route at that hour (88%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 50 | 86% |
| Tuesday | 46 | 83% |
| Wednesday | 45 | 93% |
| Thursday | 47 | 85% |
| Friday | 48 | 81% |
| Saturday | 48 | 85% |
| Sunday | 49 | 86% |
Why it was late
All flights CVG → MIA · Connecting off AA 3638? Check the risk
Questions
How often is AA 3638 from CVG to MIA late?
American Airlines 3638 from Cincinnati, OH to Miami, FL arrived 15 or more minutes late, was diverted or was cancelled on 14% of 333 scheduled flights between September 2025 and August 2026. 0.6% 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.