There are several streaming platforms that have a wide selection of classic Christmas cartoons, such as Netflix, Hulu, and Disney+. Many of these platforms offer a variety of holiday-themed programming, including Christmas specials, animated movies, and television shows. Some of the most popular classic Christmas cartoons include "Rudolph the Red-Nosed Reindeer," "A Charlie Brown Christmas," and "Frosty the Snowman." If you're looking for a specific classic Christmas cartoon, I'd recommend searching for it on one of these streaming platforms.