Sit on the Left side of the plane for the best views on flights from Duesseldorf to Barcelona. While takeoff offers Rhine Valley views on the right, the landing approach provides more dramatic and varied scenery with the Mediterranean, coastal Barcelona, and mountain backdrops. The left side captures the most visually distinctive final approach.

During takeoff from Dusseldorf (DUS), sit on the Right side for the best views. Düsseldorf typically departs to the north or northeast. Right-side seats offer views of the Rhine River valley and the industrial Ruhr region spreading eastward, with the river's distinctive meanders visible during climb-out. Notable sights include: Rhine River (immediate foreground), Ruhr industrial zone (east), Cologne skyline (distant northeast on clear days), North German Plain extending north.

When landing at Barcelona (BCN), sit on the Left side for the best views. Barcelona typically lands on runways 07L/07R (eastbound) or 25L/25R (westbound). Left-side seats on approach provide views of the Mediterranean coastline, the Montjuïc hills, and the city's distinctive grid layout against the sea backdrop. Notable sights include: Mediterranean Sea (immediate), Montjuïc hill with its distinctive profile (southwest of airport), Barcelona's urban grid and port facilities (north), Collserola mountain range (distant northwest).

The flight from Dusseldorf (DUS) to Barcelona (BCN) takes Approximately 2 hours 15 minutes.

The flight path crosses the Vosges Mountains (eastern France, around 48.5°N 7.0°E) at cruise altitude—visible as a north-south trending ridge with forested slopes. Further south, the Jura Mountains appear as a parallel range. The Rhône Valley opens up south of Lyon, providing a clear geographic corridor toward the Mediterranean. The Alps remain distant to the east throughout the flight but are occasionally visible on the horizon on clear days. The flight descends over southern France, crossing the Pyrenees foothills before reaching the Mediterranean coast near Barcelona.