In many tours, domestic flights are included in the destination areas, or between the countries of your trip. Whether these flights are included in the price, can be checked in the information of the trip proposal. If you're not sure, check with the local agency.
The international flights to and from your destination are not offered by the agents or us. It is usually the simplest way to book it yourself, through the numerous comparison websites on the Internet.
If flights have to be booked as part of your trip, you will usually have to pay for the flights instantly and directly. Your agent will inform you about this at the time of booking.