Boston to Washington

What the Data Says About BOS to DCA

The Boston to Washington corridor (BOS → DCA) covers roughly 399 miles and is served by 16 carriers, based on Bureau of Transportation Statistics reporting. Across 49,205 flights in the dataset, this route posts a 81.6% on-time rate with an average delay of 77.5 minutes when flights run late. Over the most recent 24 months of BTS data, 18,789 flights were recorded on this pairing — 441 cancelled (2.3%) and 55 diverted (0.3%). Those baseline metrics tell you what to expect before you book.

Having 16 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 49,205 total flights analyzed, the 81.6% on-time figure is statistically meaningful rather than a small-sample fluke. The 77.5-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 90% on-time, while Feb 2025 came in at 57% on-time — a 34-point gap between best and worst recent month. For travelers evaluating the BOS to DCA route, the combination of a 81.6% on-time rate, 77.5-minute average delay, 2.3% recent cancellation rate, and 16 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.