Airfare can always be arranged from the individuals' gateway to connect with the group at either the group's home gateway or the US departure point, but that individual's overall tour pricing may or may not end up costing more than what the majority of the group's participants are paying for an air-inclusive roundtrip rate from the group's gateway of origin.
Group leaders requesting custom international group travel may request trip pricing from the US departure point. In that case, trip participants would all have their home gateway connections purchased separately and meet up to depart the US as a group. But as I mentioned in the beginning of this series, most of a group's participants will hail from the same area and wish to travel the entire trip together.
I am always happy to discuss your options! Just give me a call!