OK, here goes a big-time important speculation, based on my knowledge of the geography of Burkina Faso, the air routes in West Africa, and the land routes and discounting the fact that this place is quite pronounceable:
Niamey, capital of NIGER
Why?
1. Because you can drive there from Dourtenga quite easily.
2. Because it is relatively easy to fly out of Niamey.
Here are two flights out on July 17:
AF731/1418 connecting through Paris-CDG to Frankfurt deaprting NIM 2350 arriving FRA 0900 +1 in time for multiple connections to DBV including OU419 depart FRA 1210 arrive DBV 1355
AT546/810 connecting through Casablanca to Frankfurt departing NIM 0245 arriving
FRA 1345 (note that flight times are slightly different for July 18) then getting later connection at 1800 through Zagreb arriving DBV 2225