Multi-city logistics don't fail because a bus breaks down — they fail because nobody was tracking the connection between city A and city B.
Each city may have a different local carrier, different traffic patterns, and different timing risk, from airport congestion to downtown event traffic to construction. Coordinating these independently, city by city, multiplies the chance that a delay in one city cascades into a missed pickup in the next.
Centralizing the program under one operations team — with real-time visibility into flight status, traffic, and each city's ground team — is what actually prevents cascading delays across a multi-city itinerary.