A journey that would have taken Inala months to traverse was completed in a couple of days by the Boar King, and that too when he was holding back.
The Boar King was able to break the sound barrier at his top sprint. Had he done that, then they would have reached the Brimgan Empire within a day. Since the passengers weren't able to withstand those speeds, he went slow.
"It seems the Brimgan Empire had raided this region just the day before." The Boar King muttered upon failing to detect any Pranic Beast activity in the location where he had arrived, "So, it'll be safe for the time being. Just march towards the entrance of the Empire and join them."
He didn't explain things further, as that wasn't necessary. Both Wittral and Amita Brimgan were very smart and knew what to do. So, his advice would be needless.