The former Hills star headed to LAX wearing a sweater cover-up over a black top and black pants Tuesday looking casual and comfortable after she arrived on a flight.
Kristin recently confirmed she and hubby Jay Cutler are expecting their second child, telling fans the exciting news on Twitter last month.
"Thank you for all the love!! We are so excited for Camden to be a big brother!" the 26-year-old reality star wrote Oct. 30.
Kristin and Jay, who tied the knot in June, are also parents to 15-month-old Camden Jack.