The number of cities where Whole Foods Market customers can receive same-day or even one-hour delivery of their online orders has ballooned this week.

The upscale grocer, working with delivery service Instacart, this spring began offering the service to consumers in Los Angeles. This week, Whole Foods announced an expansion to 14 more cities, all previous served by Instacart but not the grocery chain: Atlanta; Austin, TX; Boston; Boulder, CO; Chicago; Denver; Houston; New York; Philadelphia; Portland, OR; San Francisco; San Jose, CA; Seattle; and Washington, DC.

Additionally, Whole Foods says it and Instacart will test a program in select Austin and Boston Whole Foods stores that enables consumers to pick up their online orders in store. The in-store pickup program will expand to all Instacart cities “in the coming months,” the companies say.

“Instacart makes it extremely easy for our customers to buy Whole Foods Market products from 15 cities and have them quickly delivered—whether buying fresh ingredients for dinner tonight or sending healthy foods to loved ones in another city,” says Walter Robb, co-CEO of Whole Foods Market. “We are thrilled to add this additional convenience for our customers.”

Instacart typically charges $3.99 for two-hour deliveries and $14.99 for one-hour deliveries. Instacart’s minimum order is $10. For a $99 annual fee, Instacart offers free deliveries on all orders of $35 or more. Consumers can order via Instacart.com or the delivery service’s mobile app. Instacart enables shoppers to save grocery lists and set up automatic ordering for items regularly bought.

Earlier this month, Amazon.com Inc., No. 1 in the Internet Retailer Top 500 Guide, said it was working with the U.S. Postal Service to deliver groceries to online shoppers in San Francisco.