You are going to have to have a flat file Excel database that is used by a pivot table for filtering. Don't even waste time trying to create a visual chart from scratch. I wasted a few hours on that dead end.

Your flat file will need columns like

Airline
From (Zone)
To (Zone)
Season (Peak/off)
Class (...)

Then you will need lookup tables to relate Zones to specific countries for each airline. Having a line for every country-country combo will be way too tedious, while simply trying do a zone-zone mapping will not work because different airlines have different zone definitions.

Like I said, I tried this and it is a ...... It will take you many hours. But it can be a useful tool if well-constructed, no doubt.