I'm trying to book three flights in a multiple-destination scheme like: A->B, B->C, C->A
I'm doing my search in websites like eDreams, Kayak, etc, and in all of them the following happens: the total cost of the three flights booked individually is half of the cost of the cheapest multi-destination offer that I get (which by the way doesn't give any option where all three flights are direct).
I could book them all individually, but my employer requires a single invoice to reimburse me. So my question is: is there a way to work around this strange phenomenon in booking websites? Or, alternatively, is there a way to bill several different flights on the same invoice?