SAN DIEGO—A woman who repeatedly punched a flight attendant on a San Diego-bound plane pleaded guilty Dec. 22 to a federal count of interfering with flight crew members and attendants. Vyvianna Quinonez of Sacramento, 28, admitted that while on a May 23 flight from Sacramento to San Diego, she struck a Southwest Airlines flight attendant identified only as S.L. in court documents. The victim suffered injuries that included three chipped teeth—two of which sustained serious enough damage that they were replaced with crowns—a bruised left eye, a cut under her eye requiring stitches, and bruising on her arm, according to court documents. The U.S. Attorney’s Office said that during the plane’s descent into San Diego International Airport, S.L. asked Quinonez to wear her face mask properly, fasten her seat belt, and stow her tray table. In her plea agreement, Quinonez admitted to pushing the flight attendant, punching her in the face and head, and grabbing her by the hair, prompting other passengers …