When the American Football League merged with the National Football League in 1966, the clock started ticking. The two leagues were scheduled to play under their own names through 1969, and then they would fully combine to become one league under the NFL banner in 1970. Since the Bills didn’t reach the playoffs for the 1969 season, they played their last game as members of the AFL in mid-December, 1969.
Let’s say Buffalo didn’t exit on a high note. The Bills traveled all the way across the country to get clobbered by San Diego 45-6.