The crew of a Cathay Pacific flight saw what it believes was North Korea's latest missile test last week, the second airline to report sighting it.
Any missile launches must be reported to the International Civil Aviation Organization to assure the safety of civilian aircraft. However, South Korea says that the North Korean government regularly fails to issue these notices when conducting missile launches.
"Currently, our flight routings do not transverse in the vicinity of the missile trajectory as we have taken earlier steps to avoid the northern part of the Sea of Japan", noted an SIA spokesperson to Channel NewsAsia.
The missile was far from the plane, and operation was unaffected, Cathay said, adding that it had informed other carriers and relevant authorities.
Singapore Airlines has changed the travel routes of some of their flights travelling over the troubled Korean peninsula.
Despite catching glimpses of the weapon-thought to be the deadliest missile in North Korea's arsenal-Cathay Pacific and Korean Air had not chosen to alter their routes as of Tuesday, according to a Bloomberg report. "We remain alert and [will] review the situation as it evolves".
Last Wednesday, a series of ballistic missiles that the North Korea regime claimed to be able to reach the United States mainland were launched in defiance of stern warnings and global sanctions.
Meanwhile, Senator Lindsey Graham said Sunday on "Face the Nation" that preemptive war in North Korea is "becoming more likely" as the country's improving missile technology presents an increasing threat. Air France also announced at the time that it had expanded its no-fly zone over North Korea, after one of its planes flew past the location where an ICBM splashed down 10 minutes later.