United Airlines Boeing 787-9 Dreamliner. | Airways Magazine File Photo

MIAMI — United Airlines launched yesterday the world’s longest scheduled flight operated by a Boeing 787 Dreamliner, when United flight UA1 took off from the airline’s hub at San Francisco International Airport bound to Singapore.

The new route also happens to be the longest scheduled flight operated by any U.S. carrier at 8,446 miles (13,590 kilometers), and ranks among the longest flights in the world currently in service.

“Our nonstop service between San Francisco and Singapore further enhances our already unprecedented trans-Pacific route network and builds an even stronger gateway to the Pacific from our San Francisco hub,” said Jim Compton, United’s vice chairman and chief revenue officer.

Since March, the airline has added new nonstop service from the hub to Tel Aviv and Xi’an China and will also begin new service to Auckland, New Zealand, and Hangzhou, China, in July.

The new service is the sole existing direct link between the United States and Singapore, the first in almost three years, since the cancellation of Singapore Airlines’ direct flights to Los Angeles and Newark.

Singapore Airlines expects to resume its direct flights to the United States in 2019, as the carrier begins to take delivery of the ultra long-haul variant of the Airbus A350-900, dubbed the A350-90ULR.

Currently, the longest non-stop scheduled airline flight is Emirates flight EK448 from Dubai to Auckland, with a distance of 8,820 miles (14,193 km), beating the previous record from Qantas and its flight QF8 from Sydney to Dallas/Ft. Worth, operated by an Airbus A380-800, with a distance of 8,577 miles (13,804 km).