Despite a slow start to the Prime Day summer sales event, U.S. online sales reached $24.1 billion with retailers offering deeper discounts than last year.

Momentum Commerce, which manages online sales for 50 brands, said its Amazon purchases plunged 41% on Tuesday when compared with the start of Prime Day last year.

Prime Day 2025 is almost over. This year, instead of 48 hours of non-stop shopping action, Prime members had 96 hours to smash that "Add To Cart" button and put Amazon's free return policy to the test.