Kendall Jenner Shows Off Midriff at Airport; Kylie Jenner Lunches in Los Angeles

Kendall Jenner shows off her flat stomach as she arrives at JFK airport for a flight out of New York City on Monday afternoon (April 28).

The 18-year-old emerging model met up with pal Hailey Baldwin before leaving the Big Apple.

PHOTOS: Check out the latest pics of Kendall Jenner

Meanwhile across the country in Los Angeles, younger sister Kylie was seen out and about, fueling up her car before meeting up with a friend for a late lunch.

20+ pics inside of Kendall and Kylie Jenner on separate coasts…