Delta, Air India, United, and Lufthansa have round-trip flights from Chicago (ORD) to Bengaluru (BLR) for $686-$693 with a connection. Flights October, November, February, March, April, and May. No Saturday departures. Extended weekends available.
Delta fares are Main Cabin. Not Basic. Carry-on, checked bag, and seat selection are allowed without additional fee.