About 1 in 10 AA 1178 flights from Washington arrived 15+ minutes late, diverted or cancelled over the past year (10%); 2.8% were cancelled. The typical flight landed 18 minutes early.
AA 1178: DCA → MIA
Scheduled to leave Washington at 5:00 a.m. local time. Over the past year it arrived on time 90% of the time (181 flights), in line with other AA flights on the route at that hour (90%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 26 | 85% |
| Tuesday | 26 | 96% |
| Wednesday | 26 | 88% |
| Thursday | 26 | 96% |
| Friday | 26 | 92% |
| Saturday | 26 | 92% |
| Sunday | 25 | 80% |
Why it was late
All flights DCA → MIA · Connecting off AA 1178? Check the risk
Questions
How often is AA 1178 from DCA to MIA late?
American Airlines 1178 from Washington, DC to Miami, FL arrived 15 or more minutes late, was diverted or was cancelled on 10% of 181 scheduled flights between September 2025 and August 2026. 2.8% 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.