Due to operational and security limitations, the airline has decided to bring forward the suspension of its flights from Lima and Bogotá to Caracas from July 27, instead of August 16 as originally planned.

From a statement issued by Avianca:

Bogotá, July 27, 2017. Due to operational limitations registered in the last few hours, Avianca is obliged to suspend its operations to Venezuelafrom today, and NOT from August 16 as scheduled. This includes closing ticket sales on the routes connecting Caracas with Bogotá and Lima. 

The airline is making every effort to best serve passengers with reservations on flights scheduled for this week to that country. These passengers are being re-booked on flights from other airlines based on availability. Unreserved travelers will be reimbursed 100% of the value paid for their tickets. 

Avianca appreciates the understanding regarding this measure which is aimed at preserving safety.
More information can be found through Avianca.com and the customer services in:
Venezuela: (0 800) 284-2622
Bogotá: (57 1) 401-3434
Colombia: (01 8000) 95-3434 free national line from fixed numbers. 
Lima: (511) 511-8222
Peru: (0 800) 5-1111