A Frontier Airlines flight was on the taxiway at the Denver International Airport for nearly 50 minutes due to threatening notes that were found on board the plane. Frontier Flight 3406 was on it's way from the Seattle-Tacoma International Airport to DIA when crewmembers discovered two threatening notes on the aircraft, according to a statement from Frontier. Law enforcement was immediately alerted and the flight landed safely at DIA. Read more at: https://www.9news.com/article/news/crime/frontier-airlines-bomb-threat-denver/73-1f7a6dd6-f777-4c28-8b46-d6d6f018af6b More local videos here: https://youtube.com/@9news Subscribe to NEXT: https://youtube.com/@Nexton9NEWS Stay connected: 9NEWS Website: https://www.9news.com/ Facebook: https://www.facebook.com/ilike9news X: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.