Sheryl Sandberg was scheduled to take the Asiana Airlines flight. (James Duncan Davidson)

Facebook executive Sheryl Sandberg was scheduled to be on the Asiana Airlines flight that crash landed at San Francisco International Airport today but changed her plans at the last minute.

Sandberg, author of the best-selling "Lean In: Women, Work, and the Will to Lead," posted a note on her Facebook wall explaining that she was "taking a minute to be thankful" after hearing that the flight had crashed.

"[We] were originally going to take the Asiana flight that just crash-landed," Sandberg wrote. "We switched to United so we could use miles for my family's tickets."

After the Asiana Airlines flight crashed, the tail was ripped off the plane and it quickly caught fire.

Sandberg was returning from a trip to Seoul, South Korea, where she gave a talk related to her Lean In Organization, a non-profit designed to help women achieve their goals.

According to her Facebook post, Sandberg wrote that her plane landed just 20 minutes before the Asiana flight crashed. Sandberg also said her friend David Eun was on the Asiana flight, but escaped the accident unharmed.