Whilst not a printed rule, there's a four-phase limit for each path of travel on a round-excursion award with United miles. There are a few other stories that 9 segments are achievable on a round excursion, but that might be thinking of the Excursionist Perk as a kind of legs. https://travel-agency-management02468.blogoscience.com/39789444/the-ultimate-guide-to-world-luxury-awards-2025