Domestic Air Travel: Lowest Since Post-9/11 [View article]
The passenger revenue miles response to 9/11 looks typical of a short impulse response, while the current decline looks much more like a step function response. (Reasonably assuming that passenger revenue miles can be modeled as a function of the derivative of GDP over time.)
Or more simply, don't expect domestic air passenger revenue-miles to recover any time soon.
Domestic Air Travel: Lowest Since Post-9/11 [View article]
Or more simply, don't expect domestic air passenger revenue-miles to recover any time soon.