SEATTLE — Stepping up its challenge to brick-and-mortar retailers, launched a new shipping feature Thursday that will let shoppers buy a product on its website by noon and have it delivered by 9 p.m., seven days a week.

The new service, called Prime Free Same-Day Delivery, will be available on more than 1 million products and in 14 metropolitan areas in the United States. There will be no shipping cost for members of Amazon’s $99-a-year Prime service, as long as the order tops $35.

Amazon introduced same-day shipping in seven markets in 2009 and has expanded it since then. But Prime customers have had to pay an extra $5.99 per order for the expedited shipping. (They’ll still have to pay $5.99 for same-day delivery if their order is less than $35.) Non-Prime shoppers will continue to pay $8.99 per order and 99 cents per item for same-day delivery in the markets where it’s available.

Only subscribers are eligible to post comments. Please subscribe or login first for digital access. Here’s why.

Use the form below to reset your password. When you've submitted your account email, we will send an email with a reset code.