What is the collective noun for chartered planes?

There isn't a widely accepted, specific collective noun for chartered planes.

You could use a general collective noun like:

* Fleet - A fleet of chartered planes

* Group - A group of chartered planes

* Set - A set of chartered planes

Or, you could be more descriptive and use a phrase like:

* A squadron of chartered planes

* A collection of chartered planes

* A roster of chartered planes

Ultimately, the best collective noun will depend on the specific context of your writing.