The expansion club captured the trophy after only six seasons with a 9-3 home triumph over Florida on Tuesday to claim the best-of-seven championship series four games to one.
With temperatures at 96 degrees Fahrenheit (35.5 Celsius), floats and flatbeds and open-topped buses made the trek past the famed casinos as supporters cheered from along the city streets, police making a crowd estimate of 100,000 people along Las Vegas Boulevard.
The Golden Knights Twitter page was predicting the "Party of the Century" with the theme of the parade being the team's motto -- "Vegas UKnighted."
Players were among those tossing Knights championship T-shirts, towels and flags into the cheering crowd as the team's dance team and drum line, used before games to excite fans, led the procession along the street.
Knights centre Nicolas Roy screamed as he hoisted the Cup over his head while supporters along the streets roared with delight.
"Incredible," Roy said after passing the trophy off to teammate Ivan Barbashev. "That's the best feeling in the world. That will never get old. I can do that as long as I live."
Players poured drinks into the bowl of the trophy and tipped it over above the crowd, allowing Knights fans to partake in a players' tradition of drinking from the Cup.
It was the second Cup title for Barbashev, a 27-year-old Russian centre who also won an NHL crown in 2019 with St. Louis.
"This is going to stay for a lifetime. I'm really proud of where I'm at right now. It's super amazing," Barbashev said.
"I'm just really happy. You have a chance to party with the guys. It has got to be the best time of my life."
"To lift the Cup here is something that will stay with me for the rest of my life."
