The first stage is back on the launch pad Sunday for its second flight.
Watch a replay of the launch of a SpaceX Falcon 9 rocket from Cape Canaveral shortly after midnight Monday with the SES 12 communications satellite. The four-hour launch window opens on Monday, June 4 at 12:29 a.m. EDT.
Musk also wants to reuse the two-stage Falon 9's upper stage and its payload fairing - the nose cone that protects satellites during launch.
Air Force and weather officials predict a 70 percent chance of good launch weather.
SES-12 is capable of broadcasting and providing broadband data services focused on the high-growth Asia-Pacific region.More news: Allies hit back at Trump’s steel, aluminium tariffs
The first stage has flown once before, in September 2017, carrying the robotic X-37B space plane for the US military.
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 will reportedly no longer be sending a pair of space tourists to circle the moon this year. The satellite will be deployed roughly 32 minutes after liftoff.
SpaceX won't land the booster again, as the company is trying to phase out the Block 4 rockets for the new Block 5 configuration.