The Olympic gold medalist, 73, admitted during an interview on UK daytime talk show "This Morning" on Wednesday that she and Chris "never really talk anymore", adding, "It's sad."
"If there's any communication, my manager kind of talks to him and when you have as many kids as I do, you're closer to some than others... definitely see them and we do this and that."
"I'm very close on the Jenner side, but Kris, I don't have much contact with her. It's kind of sad because we've been through so much."
Caitlyn was married to Chris, 67, for 22 years before divorcing in 2015 - the same year the former decathlete came out as transgender.
They share two children together - Kendall Jenner, 27, and Kylie Jenner, 26 - and Caitlyn is also stepfather to Kris' children from her previous marriage to Robert Kardashian.
Kourtney Kardashian, 44, Kim Kardashian, 42, Khloe Kardashian, 39, and Rob Kardashian. , 36.
The once-tight bond of the blended family was very appealing to viewers who watched their first reality TV show, "Keeping Up with the Kardashians" from 2007 to 2021.