Washington to Miami

What the Data Says About DCA to MIA

The Washington to Miami corridor (DCA → MIA) covers roughly 919 miles and is served by 12 carriers, based on Bureau of Transportation Statistics reporting. Across 18,948 flights in the dataset, this route posts a 79.4% on-time rate with an average delay of 82.9 minutes when flights run late. Over the most recent 24 months of BTS data, 7,959 flights were recorded on this pairing — 169 cancelled (2.1%) and 26 diverted (0.3%). Those baseline metrics tell you what to expect before you book.

Having 12 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 18,948 total flights analyzed, the 79.4% on-time figure is statistically meaningful rather than a small-sample fluke. The 82.9-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 92% on-time, while Aug 2024 came in at 63% on-time — a 29-point gap between best and worst recent month. For travelers evaluating the DCA to MIA route, the combination of a 79.4% on-time rate, 82.9-minute average delay, 2.1% recent cancellation rate, and 12 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.