What is the ATIS frequency at O'Hare?

The ATIS (Automatic Terminal Information Service) frequency at O'Hare International Airport is crucial for pilots as it provides them with vital information about the airport's current weather conditions, active runways, and other relevant data. The correct frequency, 135.400, allows pilots to tune in and receive updates without having to rely on air traffic control for routine information. This enables a more efficient flow of communication, allowing air traffic controllers to focus on their primary responsibilities.

The other frequency options, while used at various other airports or for different purposes, are not the designated ATIS frequency for O'Hare, which is important for pilots to be aware of in order to ensure accurate and timely receipt of information essential for safe and efficient operations at the airport.