Sit on the Right side of the plane for the best views on flights from Seoul to Frankfurt. The right side wins overall because the Incheon departure delivers genuinely spectacular scenery — Seoul, the Han River, and the island-dotted Yellow Sea — during the most visually engaging phase of flight. The Frankfurt landing on the left is good but the city views are more modest. Across the cruise portion, both sides see similar Siberian and Central Asian terrain, so the departure advantage tips the balance to the right.

During takeoff from Incheon International (ICN), sit on the Right side for the best views. ICN departures heading northeast on runway 33L/33R put the Yellow Sea and the islands of the Incheon archipelago on the right side. You also get a clear view back toward Seoul's Han River and the city skyline as the aircraft banks. Left side faces open water with little of interest. Notable sights include: Yellow Sea and Incheon island archipelago, Han River and Seoul city grid, Bukhansan mountain ridgeline north of Seoul, Gyeonggi Bay coastal mudflats.

When landing at Frankfurt Main (FRA), sit on the Left side for the best views. Frankfurt approaches from the east on runway 25L/25C put the Rhine River valley and the Frankfurt city center on the left side. You get a direct view of the Main River bending through the city and the Taunus hills to the north. Right side faces flat agricultural land south of the airport. Notable sights include: Frankfurt city center and Main River bend, Rhine River valley to the northwest, Taunus hill range north of Frankfurt, Sachsenhausen district and Museumsufer riverbank.

The flight from Incheon International (ICN) to Frankfurt Main (FRA) takes Approximately 11 to 12 hours.

The route tracks northwest over the Yellow Sea, crosses northeastern China near Shenyang, then transits Siberia over the Yenisei River basin and West Siberian Plain. It crosses the Ural Mountains — visible as a low, broad ridge — then passes over the North European Plain through Russia and Poland before descending into Germany. Notable features include the frozen Ob and Yenisei river systems in winter, the Ural Mountains as a clear geographic boundary between Asia and Europe, and the patchwork agricultural plains of Poland and western Germany on descent.