Four more foreign airlines began to launch their flights to Tan Son Nhat international airport between mid-October and mid-November, according to the Saigon Ground Services Company Limited (SAGS). On October 17, Royal Brunei Airlines officially resumed regular returned flights to Ho Chi Minh City on aircrafts A319-A320 with a frequency of four flights a week Particularly, two Russian airlines, Nordwind Ailrines (N4) and Ikar Airlines (IKAR) started irregular flights to Tan Son Nhat on aircraft B767 on October 19. The flights are co-organized by Russian tourism agency Pegas Touristik and Vietnamese travel agency Anh Duong. In November, Lot Polish Airlines from Poland developed some irregular flights to Ho Chi Minh City on Boeing Dreamliner B787-8. With 11 flights scheduled for Warsaw – Ho Chi Minh City route, the airlines hoped to give travellers more choices for their journey.