Avianca usually allows date changes for flights with associated fees based on fare type. Contact their customer service or visit their website for specific details on their Avianca Flight Change Policy.

Are you worried about changing your Avianca flight? Don’t worry! It got you covered with a hassle-free Avianca flight change policy. They understand that plans can change unexpectedly, and that’s why they offer flexibility and convenience to their valued passengers. With them, changing your flight is as easy as a breeze.

https://www.flightadvisers.com/avianca-airlines-flight-change-policy.php