Can I use my current passport for ticket booking and renew it?
The passport number is really not important while booking the ticket and most of the sites allow you to book without passport number also. even if you book your ticket with your old passport number , you need to have a valid passport and a valid VISA to your Destination(or it should be a VISA free or a VISA on Arrival destination for you) at the time of checkin and the airline staff would make the changes and it is basically immigration authorities who check the passport . Hope This helps.