United Airlines has added a second daily non-stop flight between San Francisco International Airport and Hong Kong International Airport.
The US carrier will start the additional flight on 26 October, which will give passengers the chance to choose a midday or late-night departure.
Both daily flights will be operated utilising Boeing 777-200ER aircraft.
The move is part of network expansion in San Francisco by United Airlines as this year it started a new seasonal service from San Francisco to Amsterdam; and extended Auckland, New Zealand and Tahiti, French Polynesia services to year-round.
The airline also began a second daily flight to Seoul, South Korea and twice-daily service to Toronto, Canada. In October, United will begin seasonal non-stop service to Melbourne, Australia and new seasonal service to New Delhi in December.
With these new routes, the airline 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.
United is the largest airline at San Francisco International Airport and operates more than 300 daily flights.