The non-reporting of scheduled departures for certain carriers in the US DOT T-100 dataset is a known issue. Unfortunately, some carriers do not include their scheduled departures when they file their data for T-100 to the U.S. Department of Transportation. If the carriers do not file scheduled departures for T-100, we cannot have it reported which is why some, but not all, of the carriers are showing “0” for the scheduled departures.
Our recommendation is to compare the T-100 Departures against Scheduled Flights (e.g. by running the Scheduled Monthly Summary Report, Diio Mi: Market Intelligence), but noting that there will be some differences due to the fact that the T-100 data includes charters, extra sections, and diversions. You may notice that there are more flights in the Schedule reports vs T-100 departures, because not all scheduled flights were operated, yet there are more markets shown in T-100 because of diversions and charters.
There may be other factors why T-100 and Scheduled Reports do not match and the most common reasons are:
- DOT uses different equipment codes than the published schedule data
- Carrier's incorrectly filed their DOT data.
- Your Schedule reports are using enhanced or traditional seat counts
Note: Please see this link for further explanation of Enhanced and Traditional seat counts: https://helpdesk.cirium.com/hc/en-us/articles/360023826091-Seat-Counts-Traditional-or-Enhanced
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