Washington to Burlington

What the Data Says About IAD to BTV

The Washington to Burlington corridor (IAD → BTV) covers roughly 441 miles and is served by 10 carriers, based on Bureau of Transportation Statistics reporting. Across 2,326 flights in the dataset, this route posts a 85.3% on-time rate with an average delay of 76.7 minutes when flights run late. Over the most recent 24 months of BTS data, 1,287 flights were recorded on this pairing — 26 cancelled (2.0%) and 6 diverted (0.5%). Those baseline metrics tell you what to expect before you book.

Having 10 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 2,326 total flights analyzed, the 85.3% on-time figure is statistically meaningful rather than a small-sample fluke. The 76.7-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, Apr 2025 posted the best performance on this corridor at 98% on-time, while Jun 2025 came in at 66% on-time — a 32-point gap between best and worst recent month. For travelers evaluating the IAD to BTV route, the combination of a 85.3% on-time rate, 76.7-minute average delay, 2.0% recent cancellation rate, and 10 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.