To contact Avianca Airlines by WhatsApp, you can follow these steps:

1. Add the Avianca Airlines WhatsApp number to your contacts: +57 316 821 2999.
2. Open WhatsApp and start a new chat with Avianca Airlines by searching for the contact you just added.
3. Type your message and send it to Avianca Airlines.

Note that the Avianca Airlines Telefono WhatsApp service is available from Monday to Sunday, from 6:00 AM to 10:00 PM (GMT-5). If you have any urgent issues outside of these hours, you can contact Avianca Airlines through their customer service hotline or by visiting their website. If you want to know more you can read the full blog.