New Delhi, June 6 -- Fast-growing IndiGo, India's largest airline, will begin its first U.S. codeshares.

IndiGo will partner with Delta and KLM on U.S. and Canada codeshares from Amsterdam and with Virgin Atlantic for U.S. codeshares from Manchester, England.

For now, the partnerships are limited, but they potentially could be an early step toward deeper integration between IndiGo and the transatlantic joint venture alliance of Delta, Virgin Atlantic and Air France-KLM. CEOs from all three companies joined IndiGo CEO Pieter Elbers at a press conference Sunday at IATA's Annual General Meeting to announce the partnership.

"We believe that the opportunity of this is just immense," Elbers said.

IndiGo already codeshares with Air Franc...