Detroit to Philadelphia

What the Data Says About DTW to PHL

The Detroit to Philadelphia corridor (DTW → PHL) covers roughly 453 miles and is served by 59 carriers, based on Bureau of Transportation Statistics reporting. Across 15,936 flights in the dataset, this route posts a 84.4% on-time rate with an average delay of 86.3 minutes when flights run late. Over the most recent 24 months of BTS data, 6,195 flights were recorded on this pairing — 116 cancelled (1.9%) and 5 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 59 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 15,936 total flights analyzed, the 84.4% on-time figure is statistically meaningful rather than a small-sample fluke. The 86.3-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, Feb 2024 posted the best performance on this corridor at 92% on-time, while Dec 2025 came in at 66% on-time — a 27-point gap between best and worst recent month. For travelers evaluating the DTW to PHL route, the combination of a 84.4% on-time rate, 86.3-minute average delay, 1.9% recent cancellation rate, and 59 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.