That would be about an 8-hour trip on foot, according to the map and some figures I've found (her above-normal pace would be countered somewhat by taking a direct route over less than even terrain rather than the roads, or by taking a longer route along roads). Considering she left at noon, she would get there around evening. This timing matches up. This just leaves the pace of the Blank who scouted it out. They have some form of psychic connection, so the Blank only has to make a one-way trip. It has had 1 or 2 hours to do so. That means somewhere around 20-30 km/h flying speed. This is about the cruising speed of an average bird, which is a reasonable figure to apply to a flying entity travelling some distance.

Therefore, the given travel time is reasonable.

Besides, no point taking multiple posts to travel simply in order to meet up.