Examples from the Web for seatmate
But then, when one sparkled bustier passed her on the runway, she pointed and whispered to her seatmate: “Now, that I could wear.”Phaedra Parks of ‘Real Housewives of Atlanta’ at Jeremy Scott NYFW Show|Isabel Wilkinson|February 16, 2012|DAILY BEAST
Bessie's seatmate, a girl named Nora, about Bessie's own age, was very mischievous.The value of a praying mother|Isabel C. Byrum
Bud turned to his seatmate, a youngster who was tackling the complexities of the eighth grade for the third time.The Black Fawn|James Arthur Kjelgaard
"Sure," asserted the other, delighted to be able to surprise her seatmate.Elsie Marley, Honey|Joslyn Gray
I was her seatmate during all of the remainder of that school year.
A number greeted Toms seatmate as an old friend and our hero was introduced to them.Tom Fairfield's Schooldays|Allen Chapman