What is one operation restriction for flying through a Class B airspace?

In Class B airspace, obtaining clearance from Air Traffic Control (ATC) is a fundamental requirement. This is because Class B airspace is typically found around larger airports and is designed to accommodate high-density traffic. To ensure safety and prevent conflicts between aircraft, pilots must communicate with ATC to receive authorization before entering this airspace. This clearance ensures that ATC can provide instructions and maintain proper separation between aircraft, which is vital in busy airspace environments.

While filing a flight plan is common practice in certain contexts, it is not specifically a mandatory requirement for entering Class B airspace. Maintaining VFR (Visual Flight Rules) can be done under specific conditions, but it does not pertain directly to entry requirements for Class B airspace. Similarly, while flying below 2,500 feet is relevant in various regulations, it does not specifically relate to the operation restrictions of Class B airspace concerning entering and operating within it.