Best Costco deals to compete with Amazon Prime Day 2025: My favorite sales so far

When is October Prime Day 2025? 

This year, October Prime Day will run from Tuesday, Oct. 7 through Wednesday, Oct. 8. It will be a two-day sale, compared to four days for July 

Does Costco also hold a sale for Prime Day? 

Costco doesn’t hold a specific sale event to compete with the October Prime Big Deal Days sale. In July, it held a Member Savings Days event the same week as Prime Day. But you can expect to find the store’s usual monthly price markdowns during this time.

How did we choose these Costco…