✅ Yes — Big Bus Tours in Las Vegas does go to the “Welcome to Fabulous Las Vegas” sign on its hop-on, hop-off sightseeing route. 
Here’s how it works:
🚌 Daytime Hop-On Hop-Off Tour (Red Route):
• One of the official Big Bus stops is at the Welcome to Fabulous Las Vegas Sign (at the Harley-Davidson parking area on Las Vegas Blvd). 
• You can hop off at that stop to take photos and explore, then hop back on later. 
🌃 Night Tours:
• Certain night tours (especially the Late Night Tour) include a photo stop at the “Welcome to Fabulous Las Vegas” sign as part of the evening itinerary. 
So if seeing and stopping at the Las Vegas sign is important to you, Big Bus Tours is a good option — especially if you pick a ticket that includes that stop or choose a night tour that offers a dedicated photo stop. 
Would you like the exact location and tips for the best photo spot at the Las Vegas sign?