About 1 in 14 AA 4642 flights from Columbus arrived 15+ minutes late, diverted or cancelled over the past year (7%); 1.1% were cancelled. The typical flight landed 15 minutes early.
AA 4642: CMH → BOS
Scheduled to leave Columbus at 8:00 a.m. local time, operated by Republic Airways as YX 4642. Over the past year it arrived on time 93% of the time (358 flights), in line with other AA flights on the route at that hour (91%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 87% |
| Tuesday | 52 | 94% |
| Wednesday | 52 | 90% |
| Thursday | 51 | 94% |
| Friday | 52 | 98% |
| Saturday | 47 | 94% |
| Sunday | 51 | 94% |
Why it was late
All flights CMH → BOS · Connecting off AA 4642? Check the risk
Questions
How often is AA 4642 from CMH to BOS late?
American Airlines 4642 from Columbus, OH to Boston, MA arrived 15 or more minutes late, was diverted or was cancelled on 7% of 358 scheduled flights between September 2025 and August 2026. 1.1% 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.