Sunday's matchup between the Las Vegas Aces and the Chicago Sky averaged 1.22 million viewers on CBS.
The game, which peaked with 1.65 million viewers, was the most-watched game this season that did not feature Caitlin Clark.
CBS averaged 1.1 million viewers this season on WNBA games, up 86% from last year.
Saturday's game between the Fever and the Lynx averaged 598,000 viewers on NBA TV, the most-watched WNBA game ever on the network.