The exact rate to send a DVD depends on a number of factors, including its weight, packaging and destination. USPS Media Mail is often recommended for DVDs. As of August, 2014, this costs $2.69 without tracking.
The $2.69 price assumes that the package does not weigh more than 1 pound. If the DVD is larger than standard with heavier packaging, the Media Mail prices rise with each extra pound. The price for between 1 and 2 pounds is $3.17. There is an additional cost for a package to be tracked. The USPS tracking rate is $0.23 when Media Mail is used. These rates assume that the package is being sent domestically within the United States.