Fifa cut standard ticket prices for the semi-final between Chelsea and Fluminense at MetLife Stadium in East Rutherford, New Jersey, on Tuesday to $13.40 from $473.90 earlier in the past week.
Fifa has used dynamic pricing for the 63-game tournament.
Standard ticket prices for Wednesday’s semi-final between European champion Paris Saint-Germain and Real Madrid in New Jersey start at $199.60.
Fifa had dropped ticket prices to $11.15 for a quarter-final in Orlando, Florida, between Fluminense and Al Hilal. and in Philadelphia between Chelsea and Palmeiras.
The dramatic drop in prices was first reported by the Athletic.
Many matches during the tournament have had sparse crowds. Real Madrid have been an exception, drawing at least 60,000 for all five of their matches, including 76,611 for their quarter-final win Saturday over Borussia Dortmund in New Jersey.