How Early Can I Obtain a Clearance

[John[_31_]]

If I'm flying into an airport in Class B airspace, it is often
convenient to pick up the outbound clearance while taxiing in.

How soon can I obtain a clearance before the outbound flight? If I'm
waiting for a passenger to pickup, can a VFR clearance (incl. route,
squawk, etc). expire in 30 mins, 90 mins, 180 mins, etc?

[Duane \Jasmine\ Ritter]

On Apr 9, 4:16*pm, John > wrote:
> If I'm flying into an airport in Class B airspace, it is often
> convenient to pick up the outbound clearance while taxiing in.
>
> * How soon can I obtain a clearance before the outbound flight? *If I'm
> waiting for a passenger to pickup, can a VFR clearance (incl. route,
> squawk, etc). expire in 30 mins, 90 mins, 180 mins, etc?

First you have to wake up your ATC.

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dUanE