Plan for 17 days in a row, and then be extended 3 days. If you do that, then you will be "happy", as most trips are less than that. Trips range from 1 day to more than 17 days. I would say the average trip in the JFK base is 1-2 weeks. JFK is the most junior, I think, but bases don't matter much at Atlas as you airline from your Gateway, unless you live in base, and even then you may be airlined to somewhere else, as many trips do not start/end in your base.

Lately, even though I have been scheduled for 17 days, I have been doing some R1 at home, so not gone 17 days.

cliff
GRB