Kourtney Kardashian may be leaving Los Angeles for a friend-filled trip to Montana -- but she does NOT look happy about it!

Amid growing Scott Disick split drama, the 36-year-old reality star jetted out of LAX yesterday with her nine-month-old baby Reign. Carrying her wee one, the mom of three had to be barefoot to get through security -- but at least this time she isn't barefoot AND pregnant!

It looks like the stress of the split is wearing on the single mom and she had to suddenly leave town with her young son. For the flight outta town, Kourt donned some black leggings that highlighted her thin frame, and a white overshirt. She dressed her little man in a black ensemble, complete with a denim jacket.

The harried mom looked pretty stressed as she headed through security with her baby in tow. But we can't blame her, we'd be stressed too if our longtime partner was caught stumbling out of a club with two floozies last week! It's probably good for the mom of three to get out of town with some friends and away from the Disick drama!

Kourt arrived safely and later Instagramed a pic of her hanging with Scott Sartiano, who owns Butter and 1Oak in NYC, his wife and another couple. The fifth wheel was sipping on some wine in front of a picturesque Montana view. Not a bad way to relax!