Route · IAD → PHL · 2020–2025 BTS data
Washington to Philadelphia
The IAD–PHL corridor (Washington, DC → Philadelphia, PA) runs ahead of the national average, served by 6 carriers across roughly 135 miles.
Data updated 2026-06-13
- 81.6%
- On-time
- +2.6 pts
- vs US avg
- 83 min
- Delay when late
- 760
- Flights
Cancelled
3.9%
Best Month
Aug 2020 92%
Worst Month
Aug 2021 67%
Distance
135 mi
Carriers
6
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Nov 2025 | 50 | 6 | 5 | 0 | YX |
| Feb 2022 | 74 | 12 | 3 | 0 | YV,YX,UA |
| Jan 2022 | 63 | 13 | 12 | 0 | UA,YV,YX |
| Dec 2021 | 31 | 9 | 0 | 0 | UA,YV |
| Oct 2021 | 86 | 18 | 2 | 0 | UA,YV,YX |
| Sep 2021 | 88 | 15 | 0 | 0 | YV,YX |
| Aug 2021 | 93 | 31 | 0 | 0 | YV,YX |
| Jul 2021 | 61 | 18 | 5 | 0 | YV,YX |
| Jan 2021 | 47 | 2 | 2 | 0 | YX |
| Oct 2020 | 53 | 5 | 0 | 0 | YV |
| Aug 2020 | 62 | 5 | 1 | 0 | YV |
| Jul 2020 | 52 | 6 | 0 | 0 | YV |
Cancellation Rate
3.9%
30 of 760 flights
Diversion Rate
0.0%
0 of 760 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
IAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
Origin airport →PHL - Philadelphia
Full on-time, delay-cause, and seasonal performance for Philadelphia, PA.
Destination airport →Compare the two airports
See IAD and PHL side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to IAD–PHL.
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What the Data Says About IAD to PHL
760 tracked flights put the IAD to PHL pairing (Washington to Philadelphia) at a 81.6% on-time rate, squarely in line with the wider network. Delays that do occur run 83.3 minutes on average. Across the 135-mile route and its 6 carriers, the trailing 24 months show 3.9% cancelled and 0.0% diverted (760 flights sampled).
The monthly split is wide on this route: Aug 2020 posted the strongest performance at 92% on-time, while Aug 2021 came in at just 67% - a 25-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.