(NBC) - Amazon.com is expanding their Sunday delivery service.
The online retail giant announced early Thursday that they are expanding the list of cities that they will offer Sunday delivery.
Cities include Philadelphia, Cincinnati, Dallas, Oklahoma City, and New Orleans as well as several other markets.
Amazon initially rolled out the service shortly before the holiday rush in New York and Los Angeles as part of a new deal with the postal service.
The Sunday delivery service is available at no extra charge.
If Amazon's Sunday service is available in your area, you will see a notice at checkout.