Domestic airlines are allowed to transport passengers with a frequency of one flight a day on certain routes, including Hà Nội-HCM City and vice versa, Hà Nội-Đà Nẵng, Hà Nội-Phú Quốc and vice versa; HCM City-Đà Nẵng, HCM City-Phú Quốc and vice versa.