I'd argue the Kansas City Chiefs have the best home-field advantage. Arrowhead Stadium’s deafening crowd noise, often exceeding 140 decibels, disrupts opposing offenses, especially in high-stakes games. The Seattle Seahawks' "12th Man" at Lumen Field is also legendary, creating false starts and momentum shifts. Green Bay’s Lambeau Field provides a brutal winter setting that favors the Packers, especially against warm-weather teams.