What is the recommended arrival time at O'Hare for international flights?

The recommended arrival time for international flights at O'Hare Airport is 2-3 hours before departure. This timeframe is suggested to ensure travelers have ample time to go through various necessary pre-flight processes, including check-in, security screening, and potentially customs and immigration procedures. International travel often involves more complex requirements than domestic flights, such as verifying travel documents, handling luggage, and navigating security, which can take additional time. Arriving within this recommended window helps to reduce stress and ensures that passengers can address any unexpected issues that may arise before their flight.