Which frequency is used for ATIS communication?

The frequency used for ATIS (Automatic Terminal Information Service) communication at O'Hare Airport is indeed 135.40 MHz. ATIS broadcasts essential information to pilots, such as runway conditions, weather reports, and other pertinent operational data, allowing them to obtain this information before contacting air traffic control. This frequency is specifically designated to provide continuous broadcasts, which helps to streamline communication and reduce the workload for controllers and pilots alike.

By utilizing a separate frequency for ATIS, pilots can listen to the information while they are on their approach or departure without needing to engage directly with air traffic control. The use of a dedicated frequency like 135.40 ensures that the information is accessible and helps maintain efficient operations at busy airports like O'Hare.