Maybe it pays to wait to book a hotel room for the Super Bowl.

Room rates for Las Vegas motels and hotels for the Friday and Saturday nights preceding the Super Bowl plummeted an estimated 35 percent from when a survey was first taken Jan. 18.

Room rates fluctuate over time, based on supply and demand. A survey completed Thursday showed rates averaging $288.82 a night. That compares with an average rate of $443.84 a night in a survey taken three weeks earlier. A week ago, the average rate was $403.09 a night.

The survey on all three days averaged room rates for a Friday and Saturday night, Feb. 9-10 in advance of Super Bowl Sunday.