Sit on the Right side of the plane for the best views on flights from Hanoi to Seoul. The right side captures the more dramatic geography: the Red River Delta and Gulf of Tonkin on departure provide superior visual interest compared to inland highlands, and the flight path northeastward means right-side views align well with the route's general direction across the sea toward Korea.

During takeoff from Noibai International (HAN), sit on the Right side for the best views. Noibai typically departs to the northeast on runway 03L/03R. Right-side seats face toward the Red River Delta and the Gulf of Tonkin as you climb, offering water and agricultural landscape views. Left seats initially face inland toward the western highlands. Notable sights include: Red River Delta (extensive patchwork of rice paddies and waterways directly below), Gulf of Tonkin (northeastern horizon), Tam Dao Mountains (distant western ridge on left side, 40+ miles away), Hanoi city sprawl (visible briefly to the south during initial climb).

When landing at Incheon International (ICN), sit on the Left side for the best views. Incheon typically receives aircraft on runway 34L/34R (landing northeast). Left-side seats during descent offer views of the Han River estuary, Incheon's harbor, and the approach over Gyeonggi Bay. Right seats face inland toward the Korean peninsula's interior. Notable sights include: Gyeonggi Bay (water body beneath approach path), Han River estuary (wide river delta visible during descent), Incheon harbor and port facilities (container cranes and ship traffic visible at lower altitudes), Seoul metropolitan area (sprawling cityscape visible to the southeast on the horizon during final approach).

The flight from Noibai International (HAN) to Incheon International (ICN) takes Approximately 2 hours 15 minutes.

The flight crosses the Gulf of Tonkin (Beibu Gulf) for roughly 90 minutes at cruise altitude. At 25,000+ feet, you'll see the gulf's open water with occasional fishing vessel clusters visible as tiny dots. The Hainan Island coastline (China) appears on the left (west) side around the midpoint, roughly 100 miles distant on the horizon. As you approach Korean airspace, the Yellow Sea (Huang Hai) transitions to shallower waters with visible sediment plumes. The Korean peninsula's western coast becomes visible approximately 30 minutes before landing, with the Gyeonggi Bay area and Seoul's urban sprawl increasingly prominent on the right side during descent.