Kim's bestie Tracy Romulus shared a sneak peek inside the private plane Kim chartered for the trip.
The posh plane is fit for kings and queens!
During the flight, Kendall and Kourtney play Uno with a group of friends.
La La Anthony kicks back while chatting with friends in the air.
Tristan Thompson and Corey Gamble grab drinks at the fully stocked bar.
The napkins aboard the flight read, "Kim 40."
"jelly got me," Kendall wrote on Instagram.
Kendall looked breathtaking while posing in crystal clear water.
The supermodel matched the water in her striking blue-green bathing suit.
Kourtney simply captioned this photo, "selfie selfie"
Co-parents Kourtney and Scott smiled bright while on a bike ride.
Alongside this kayaking pic, Khloe wrote, "At Peace".
Kim shared on Instagram, "Girls just wanna have sun."
The birthday girl captioned a series of photos, "Night Swim".
Kourtney said online, "my sisters birthday!!(and the best week of my life)"
The Kardashian sisters splashed about during a night swim.
Kourtney and Kim beamed as they enjoyed the ocean at night.
Kim and company jumped into the crystal clear water.
The birthday girl was pulled into the water by gal pal Steph Shepherd.
Another candid moment from Kim and Kourtney.
Kim channeled her 2019 Met Gala look with this snap.
Kim seemed totally unbothered after a fun night swim.
Kim couldn't be happier while celebrating her milestone birthday.