The best options are:
1. Fly Cabo Verde Airlines (TACV). They operate regular scheduled flights with the 767 to LIS
(2 x week), CDG
(1 x week), MAD
(1 x week) and AMS
(2 x week). TACV is a reliable airline with a reasonable service.
If you live in Belgium, you could go by train to AMS
and then fly with TACV. You could phone their office directly to get a good promotional ticket:
TACV Cabo Verde Airlines
Phone: +31 (0)10 411 5411
Interesting fact: the only destination served by TACV outside Africa and Europe is FOR
2. TAP Air Portugal is the second option. They have daily flights to Sal Islands, connecting in LIS
. You could depart from Belgium, and TAP has a cooperation agreement with SN
Brussels. The good thing is that you may book your ticket on the internet, and they have very good fares (about EUR 680):
Enjoy Cape Verde!