Kim Kardashian is finally back in Los Angeles ... safe and sound with her 2 kids low key.

Kim cradled Saint while her mom, Kris Jenner, carried North off the private jet they took Thursday from NYC to L.A. Looks like Kanye West stayed behind on the east coast ... he's resuming his tour Friday night.

Kim is gradually pulling back on flaunting her wealth and she was clearly understated when she touched down.