The launch from Cape Canaveral Air Force Station's Launch Complex 40 carried a satellite for one world's biggest satellite companies - Luxembourg-based SES.
SpaceX later tweeted "Successful deployment of SES-12 to a geostationary transfer orbit confirmed". The client there was the satellite operator SES, with the payload being set to deliver TV and data services to customers in the Middle East and Asia-Pacific regions. The initial launch was scheduled for last Friday but was canceled for more testing. But the company announced the need for additional tests to the rocket's upper stage.
The rocket's first stage booster has flown before, back in September when it launched the U.S. Air Force's top-secret military space plane, the X-37B. The satellite will be deployed roughly 32 minutes after liftoff.
The company recently revealed the new Falcon 9 Block 5.
SpaceX will reportedly no longer be sending a pair of space tourists to circle the moon this year. Operating under such heavy reuse is the breakthrough expected to slash the cost of spaceflight, helping more lofty space exploration goals to be financially feasible, SpaceX founder and CEO Elon Musk has said.
SpaceX won't land the booster again.