For Newport to the ballpark, the latest service I found runs to about 8:06 PM at Newport Friars Walk on the Newport Bus route shown in the timetable. That same schedule also shows earlier departures throughout the day, with buses running roughly every hour or so on that route.

What that means

  • If you mean Newport, Wales to Newport Stadium , the last bus listed is about 7:28 PM reaching nearby stops, with arrivals around 8:06 PM at Friars Walk depending on the stop.
  • If you mean Newport, Kentucky to Great American Ball Park , the direct bus service shown runs very frequently during the day, but the source I found does not clearly list a late-night cutoff.

Quick note

The exact “last bus” can change by day of week and stop, so the precise answer depends on which Newport and which ballpark you mean.