Amazon.com Inc. has a new, expensive-to-reach target in its quest to sell everything to everyone: last-minute holiday shoppers.
The online store has spent the past year expanding its same-day delivery service to 24 metropolitan areas covering a population of 75.7 million people, or almost one in four U.S. residents, according to data compiled by Bloomberg. One option—Prime Now—gets products to customers in an hour or less.
