Key carriers for Chicago O'Hare International Airport (ORD) to Rajiv Gandhi International Airport (HYD) travel in December typically include Emirates (via Dubai), Qatar Airways (via Doha), Lufthansa (via Frankfurt), Air India (via Delhi/Mumbai on some itineraries), and United/Star Alliance partners. Emirates and Qatar are known for strong in-flight service and competitive one-stop timings; Lufthansa provides solid European connections but sometimes longer total travel time; Air India may offer direct domestic connections in India with consolidated baggage on partner itineraries. Evaluate baggage allowance, change/cancellation policies, and alliance benefits (Star Alliance vs oneworld vs SkyTeam) when choosing. CTA: Compare December flight fares and benefits across Emirates, Qatar, Air India, Lufthansa, and United to pick the best route from ORD to HYD.