I just got a pescription for 1 mg of Klonopin which I noticed works quickly, so I'm wondering when to take it tomorrow? Should I take it when I get up? An hour before the plane or should I wait until I get anxious. My issue is its a four hour flight
Klonopin reaches peak plasma levels in 1-4 hours, but most get maximum results within 2-2.5 hours, so take it at least 2.5 hours before takeoff, or earlier if you need some support for the trip to the airport which is the most dangerous part of the journey by far. Klonopin has a long half-life, up to 50 hours so it will easily last the length of the flight and probably well into tomorrow night too.
and I don't want to be a zombie when it's over
You could find it sedating so don't take more than prescribed unless you really need it. And definitely don't drink alcohol.