I'm planning to spend 15 days in Venezuela between end of July and beginning of August, and as I won't have much time I'm trying to pre-arrange things as much as possible before leaving, so I'm contacting several travel agencies and getting quotations from them for tours and flights.
Typical prices I get are 270 USD for Caracas - Los Roques return, and about 100USD for Caracas - Ciudad Bolivar/Puerto Ordaz return, and for Caracas - Merida/Barinas return.
I had also a look on the web sites of local airlines (Aeropostal, Asercaairlines, Sbairlines, Conviasa, Chapiair, Tuy, Aviorairlines, Los Roques Airlines ..), and prices seem to vary a lot, sometimes going to 50 USD or less only for a Caracas - Ciudad Bolivar, or Merida, return (instead than 100 USD).
Are the above airlines reliable, and is it safe to just buy a ticket through their web site ?
Otherwise, what is the typical surcharge an agency should take for buying a flight ticket for me ?
Thanks for the advice !

