The Flipkart Big Billion Days Sale 2025 is scheduled to start on September 15, 2025, and will run until September 30, 2025. Flipkart Plus members get early access a day before the sale officially begins. This sale is one of the biggest shopping events of the year on Flipkart, featuring massive discounts across various categories including electronics, fashion, home essentials, and more. Some sources alternatively mention the sale running from September 27 to October 5, 2025, but the most consistent official indication points to September 15 to September 30, 2025. Customers can expect exclusive bank offers, no-cost EMI options, and special discounts during this period.