Terminal Construction

Hello my friends, I have a doubt, If I build a Terminal of my, for example in New York JFK, which already has all the slots crowded, with the construction of my terminal I will open slots for me to put new flights even with the crowded slots, I wonder if I can get new flights on my terminal?

No. Building a terminal will NOT open new slots.
An own terminals just allows you to shift flights from the AS-terminal 1 to your terminal no. “nn”.
An own terminal gives you a better image and lower costs.

Valeu pela sua atenção, um grande abraço

How do you build one, even?

Go to the desired airport and your station page, select the tab “facilities”. There you can construct new passenger or cargo terminals.

But the general recommendation is, that you should only invest in terminals if you really don’t need the money for anything else… if you can spend the money on growing your airline, better do that instead.