Starting points. Diamond Bar requests most often begin in The Country, Diamond Bar Village, South Diamond Bar and Lemon Creek. A street address beats a neighborhood every time. Where a 40-foot vehicle can stop is a narrower question than where you live.
Common destinations. Destinations named for Diamond Bar include Diamond Bar Golf Course, Diamond Bar Center, Pantera Park, Summitridge Park and Lorbeer Recreation Center. Some have a coach door away from the main entrance. Worth knowing before the group is standing outside.
Book these early. Local calendars around Concerts in the Park at Pantera Park, Diamond Bar Community Foundation events, Diamond Bar Holiday Tree Lighting and Farmers Market at Diamond Bar Center concentrate demand into a handful of weekends. Availability tightens around them, so get the date held rather than shopping it.
What people book here. Diamond Bar to Downtown LA; Diamond Bar to Orange County; Diamond Bar to Inland Empire casinos. List the stops in the order you want them and be realistic about the finish — that is what the price is built on.
On price. ONT-area staging often prices below LAX-origin quotes for east-side groups; weekend LA nightlife runs add deadhead time. Your written quote is one all-in number for your route, so nothing new turns up at the curb.
Airport groups. Diamond Bar trips connect to ONT, LAX. Provide flight numbers, terminal, bag counts, and one group contact; the driver meets at the commercial-vehicle zone, which is usually not the passenger curb.
Beyond Diamond Bar. Trips that continue into Alameda, Aliso Viejo, Anaheim or Antioch are quoted as one itinerary. The California guide covers statewide staging and long-distance planning.