Sit on the Left side of the plane for the best views on flights from Frankfurt to Barcelona. Left side wins at both ends of the flight. During cruise the route tracks southwest over the Vosges, Burgundy, and the Rhône corridor, then crosses the Pyrenees — all better seen from the left side facing southeast. The right side faces northwest over open Atlantic approaches for much of the cruise.

During takeoff from Frankfurt Main (FRA), sit on the Left side for the best views. Frankfurt departures on runway 25L/25C head westward, putting the left side facing south toward the Main River valley and the Taunus hills. You get a clear view of Frankfurt's skyline receding behind you as the aircraft banks southwest toward France. Notable sights include: Frankfurt city skyline and banking district, Main River winding westward, Taunus hills to the north, Rhine River confluence near Mainz.

When landing at Barcelona (BCN), sit on the Left side for the best views. Barcelona typically lands on runway 25L/25R approaching from the northeast over the sea, or runway 07 from the southwest. On the common 25 approach from the northeast, the left side faces north toward the city, the Sagrada Familia, and the Collserola ridge behind it. The right side faces the open Mediterranean. Notable sights include: Barcelona city grid and Eixample district, Collserola ridge and Tibidabo hill, Mediterranean coastline and port, Montjuïc hill.

The flight from Frankfurt Main (FRA) to Barcelona (BCN) takes Approximately 2 hours 10 minutes.

Vosges Mountains in Alsace, Burgundy plateau and Rhône River valley, the French Massif Central on the distant right horizon, the Pyrenees mountain range crossing near Perpignan or Andorra depending on routing, Costa Brava coastline on descent