The airline will offer nonstop year-round service to Toronto and Melbourne and seasonal service to New Delhi.
United Airlines has revealed its largest-ever international network expansion from its hub at San Francisco International Airport.
The airline will offer nonstop year-round service to Toronto and Melbourne and seasonal service to New Delhi.
United also announced it will begin a second daily flight between San Francisco and Seoul, subject to government approvals.
In addition to the new routes, in 2019, United will begin new year-round nonstop services between San Francisco and Auckland, Tahiti and Amsterdam.
"This route expansion solidifies United's position at San Francisco as the gateway airline serving destinations across the Pacific, the continental United States, as well as to Europe and beyond," said Oscar Munoz, United's CEO.
"It serves as a fitting capstone to all our efforts that made 2018 a breakthrough year for United, from delivering strong financial performance to currently leading in on-time departures for the second year in a row."
With these new flights, United will serve 29 international destinations from San Francisco, including eight cities in Europe, India, and the Middle East, seven in North America, and 14 in Asia and Oceania.
The additional flights to Seoul begin on April 1, 2019 and will be operated with Boeing 777-200ER aircraft.