Sit on the Left side of the plane for the best views on flights from Seoul to Hanoi. While takeoff favors the right for Yellow Sea views, the landing experience on the left is more dramatic and geographically distinctive. The Red River delta's visual complexity and Hanoi's urban geography provide superior window-seat content for the majority of the flight's most interesting phase.

During takeoff from Incheon International (ICN), sit on the Right side for the best views. Incheon typically departs runways 03L/03R or 15L/15R. Right-side seats offer views of the Yellow Sea and Seoul's western sprawl during initial climb. Westbound departures (03L/03R) give the best perspective of the Korean peninsula's western coastline and the transition from urban to maritime landscape. Notable sights include: Yellow Sea (immediate offshore), Seoul metropolitan area (inland to the east), Incheon's reclaimed land islands, Korean peninsula's western coastline.

When landing at Noibai International (HAN), sit on the Left side for the best views. Hanoi's Noibai typically uses runways 05L/05R or 23L/23R. Left-side seats during approach (especially on 05L/05R eastbound arrivals) provide views of the Red River delta's intricate waterway system and Hanoi's urban core. The river's distinctive red-brown coloration and the surrounding rice paddies create strong visual contrast. Notable sights include: Red River and delta system, Hanoi city center, Thai Nguyen Province highlands (distant), Gulf of Tonkin (far horizon on eastbound approaches).

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

The flight path crosses the Gulf of Tonkin at roughly the midpoint. Passengers may glimpse Hainan Island (China) to the southeast on clear days, though it typically appears as a distant landmass near the horizon. The route transitions from Korean peninsula maritime zones through international airspace over the gulf, then descends toward the Red River delta. The Tonkin Gulf's waters are visibly different from the Yellow Sea—deeper blue-green coloration. Coastal Vietnam becomes visible approximately 30 minutes before landing, with the narrow coastal plain and Annamite Range foothills visible inland.