券 (けん) Ticket, Coupon, Pass
乗車券 (じょうしゃけん) Passenger Ticket, Ticket
航空券 (こうくうけん) Airplane Ticket, Plane Ticket
搭乗券 (とうじょうけん、not on WK) Boarding Ticket
前売り券 (まえうりけん) Advance Ticket, Ticket Sold In Advance
回数券 (かいすうけん) Book Of Tickets, Train Tickets, Train Coupons