Kim Kardashian Baby Bump; Should She Fly Late In Pregnancy Kim Kardashian has been logging quite a few air miles as of late, which begs the question- why is she flying during her third trimester? Well many expectant mothers are told to keep their feet on the ground during the last three months of pregnancy, the Daily Mail found out that Kardashian's numerous trips into the stratosphere have been approved by the reality star's physician.