SpaceX is targeting launch of Inmarsat-5 Flight 4 from historic Launch Complex 39A (LC-39A) at NASA’s Kennedy Space Center in Florida. The 49-minute launch window opens on Monday, May 15, at 7:21 p.m. EDT, or 23:21 UTC. A backup launch window opens on Tuesday, May 16, at 7:21 p.m. EDT, or 23:21 UTC. SpaceX will not attempt to land Falcon 9’s first stage after launch due to mission requirements.
A mission press kit is available here.