Typically, the fantasy football playoffs start Week 15, but how it breaks down from there depends on the league. In many instances, they run from Weeks 15-17, with six teams getting berths and the top two seeds receiving byes Week 15. Then, Week 16 hosts two semifinal matchups, while the championship game occurs Week 17. In leagues in which just four teams make the postseason, a common setup uses the combined scores from Weeks 15 and 16 to determine semifinal winners, before taking the combined Week 17-18 score to figure out the champion.