No. Byrne took that power away from him. I don't think many people minded though. I think Byrne era topped out a little faster than the speed of sound. 767 mph or 343 m/s.
Post-Byrne (after 1988), Supes' power levels were amped back up.
1993 - Death, Reign and Return of Superman said he could make the journey from Coast to Coast in 4 minutes. That's roughly 42,210 mph, if Supes is flying in the atmosphere and not flying to space first and arcing his way down to another part of the planet.
By 1997, with Grant Morisson on JLA, Supes was back up to Silver Age levels and then some.