I think it depends on how much data is stored per flight. If each flight is one record, sure. If each flight is tens of thousands of coordinates and velocities,

I think it depends on how much data is stored per flight. If each flight is one record, sure. If each flight is tens of thousands of coordinates and velocities, that's a lot more. Analyzing the data from 40 million data points is very different than analyzing the data from half a trillion data points. Whether that's "big data" depends on your perspective, though, but I'm not sure I'd store quite so many records in a Postgres database.