how many flights a day does B6 have?
At the end of this month, B6
will have 184 flights a day.
The rates are not the least bit astonishing when you only have something like 40 planes! That's not a lot of assets to worry about.
You have a good point that it's not really fair to compare a 38 plane fleet to a 500 plane fleet, since it's easier to track your resources when you're smaller. But the flipside is that JetBlue also has fewer resources and connections available to recover service, so it's actually more difficult to get everyone to their destinations (or complete flights) when things go wrong. It's made worse because load factors are quite a bit higher than at competing airlines, so combining flights isn't an option. More, given the fewer flights, a single cancellation at JetBlue has much more impact on the performance numbers than a single cancellation at, say, Delta, so the combination of high completion factor and ontime performance is still impressive, and reasonably accurate for comparison.
Besides, look at most other small airlines. They don't dominate completion factor and ontime performance because of these factors, though you would think so given your assumption. JetBlue really is well run in an operational sense, and being small doesn't make it any easier.