Miami to Washington

What the Data Says About MIA to DCA

The Miami to Washington corridor (MIA → DCA) covers roughly 919 miles and is served by 13 carriers, based on Bureau of Transportation Statistics reporting. Across 18,953 flights in the dataset, this route posts a 77.5% on-time rate with an average delay of 71.3 minutes when flights run late. Over the most recent 24 months of BTS data, 7,963 flights were recorded on this pairing — 161 cancelled (2.0%) and 44 diverted (0.6%). Those baseline metrics tell you what to expect before you book.

Having 13 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 18,953 total flights analyzed, the 77.5% on-time figure is statistically meaningful rather than a small-sample fluke. The 71.3-minute average delay applies only to flights that actually ran late, so it is not the average wait across all departures — the majority of flights on this route depart on time under the BTS definition of a delay (15+ minutes past schedule).

Looking at recent months, Nov 2024 posted the best performance on this corridor at 85% on-time, while Jul 2025 came in at 62% on-time — a 22-point gap between best and worst recent month. For travelers evaluating the MIA to DCA route, the combination of a 77.5% on-time rate, 71.3-minute average delay, 2.0% recent cancellation rate, and 13 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.