Sit on the Right side of the plane for the best views on flights from Hanoi to Singapore. The right side captures the most dramatic and varied scenery across the full flight: the Red River delta and Hanoi on departure, then the Truong Son mountain ranges of central Vietnam visible to the west as the aircraft tracks south, and the South China Sea coastline of Vietnam and eventually the Malay Peninsula. The left side at landing is strong but the right side wins on cumulative interest across the full route.

During takeoff from Noibai International (HAN), sit on the Right side for the best views. Noibai typically departs on runway 11R/29L or 11L/29R. Southbound departures heading toward SIN often involve a left turn out, putting the Red River delta and Hanoi city center on the right side. The right seat gets views over the Red River's braided channels and the dense urban grid of Hanoi before the aircraft climbs south. Notable sights include: Red River (Song Hong) delta channels, Hanoi city center and Hoan Kiem district, West Lake (Ho Tay) to the northwest, agricultural patchwork of the Red River plain.

When landing at Singapore Changi (SIN), sit on the Left side for the best views. Changi Airport sits on the eastern tip of Singapore island. Arrivals typically come in from the north or northeast on runway 02L/20R or 02C/20C. On approach from the north, the left side faces west over the Singapore Strait, the southern city skyline, and the Johor Strait separating Singapore from Malaysia. The left seat gets the broader panorama of the city-state's urban density and harbor. Notable sights include: Singapore CBD and Marina Bay skyline, Johor Strait and southern Malaysia coastline, Singapore Strait with heavy shipping traffic, Jurong Island industrial complex to the southwest.

The flight from Noibai International (HAN) to Singapore Changi (SIN) takes Approximately 3 hours 15 minutes to 3 hours 45 minutes.

The flight tracks roughly south-southwest over central Vietnam, passing over or near Da Nang and Hue on the coast, with the Truong Son (Annamite) mountain range visible to the west. Over the South China Sea, the coastline of southern Vietnam including the Mekong Delta's fan-shaped river mouths is visible. The flight then crosses over the Gulf of Thailand or the southern tip of the Malay Peninsula before descending into Singapore, with the Riau Islands of Indonesia visible to the south.