Delta Air Lines (DAL), Air France-KLM, Virgin Atlantic, and IndiGo have agreed to launch a partnership to build a flight network connecting India with Europe and North America, the companies said Sunday.

The partnership plans to offer travelers "broader access, smoother journeys, and a more consistent experience," the companies said.

Under the proposed deal, IndiGo customers will be able to book onward travel on some flights to Europe and North America operated by its international partners, the company said.

Air France-KLM will begin selling IndiGo flights to 24 destinations in India, the companies said.

Delta plans to resume flights to India with non-stop connections between Atlanta and Delhi, the companies said.

The memorandum also creates a framework for collaboration between airlines on loyalty programs, cargo, and sales, as well as cooperation on aircraft maintenance, sustainability, training, and ground handling, the companies said.