The move will open up flights between the US and India, with passengers able to fly to 13 cities in the subcontinent.
From here passengers will be able to connect with domestic United services to over 20 different US cities.
"Whether our customers are travelling east or west, our new partnership with Jet Airways will provide 18 more flight options that will make international travel more convenient," said Michael Whitaker, United’s senior vice president of alliances, international and regulatory affairs.
This partnership is separate to services already offered by Jet to the US. As well as flights to JFK and Newark, the airline recently announced a new route between Mumbai and San Francisco, via Shanghai.
The Asian and American markets are not the only ones to experience recent expansion from Jet Airways, with the carrier also moving into Europe with another codeshare agreement.
Flights to Lyon, Barcelona and Berlin Tempelhof are available through the partnership with Brussels Airlines. European passengers will be able to travel from the three cities through to Delhi, Mumbai and Chennai via Brussels.