For a rare disease biotech that averaged 152 miles between patients and study sites, travel logistics can make or break trial retention. This case study explores how Greenphire Travel partnered with a global biotechnology company to design a fully managed, 24/7 travel program for their rare disease participants—covering everything from international flights and hotels to wheelchair-accessible transport and emergency accommodations. The result: a 95% participant retention rate sustained over 148 weeks, across 16,000+ itineraries in 20 countries, with site staff freed from travel coordination to focus on what matters most: research and patient care.