Kendall, Kylie, Khloe, Kim and several other members of the Jenner/Kardashian family had flown out on Wednesday for a tropical vacation in Thailand.
The sisters immediately began to post photos of themselves on social media as they enjoyed the sun and sea in their skimpy swimwear.
Kendall posted pictures as she rested in the sun and walked along the beach, while younger sister Kylie thanked her friend Scotty Cunha for his "excellent candids" of herself in the sand.
The girls' older sister, Khloe Kardashian, rocked a high-cut one-piece and sailor's hat as she stood on a boat against an ocean background.
Kim Kardashian joined in as well, and captioned her photos: "Wish you were here" and "Lost in the world."
Keeping Up with the Kardashians is currently on a mid-season break. The show is in its ninth season and will return on June 6.
E! recently announced that Kourtney and Khloe will star in a new spinoff series, Kourtney and Khloe Take the Hamptons, starting this fall.