Sit on the Right side of the plane for the best views on flights from Lisbon to Frankfurt. The right side wins overall. The Lisbon departure over the Tagus estuary and city is the most dramatic moment of the flight, and during cruise the right side also looks toward the Spanish meseta, the Duero River valley, and the Pyrenees foothills as the route tracks northeast. The Frankfurt arrival on the left is good but over flat terrain with limited drama.

During takeoff from Lisboa (LIS), sit on the Right side for the best views. Lisbon's main departure runway 21 sends aircraft southwest over the Tagus estuary before turning north. The right side captures the full sweep of the Tagus River mouth, the city of Lisbon's historic hillside districts, and the 25 de Abril Bridge. Left side faces inland toward flat suburban sprawl. Notable sights include: Tagus River estuary and its wide mouth toward the Atlantic, 25 de Abril suspension bridge, Lisbon's Alfama and Baixa districts on the hillside terraces, Cristo Rei statue on the south bank.

When landing at Frankfurt Main (FRA), sit on the Left side for the best views. Frankfurt typically lands on runway 25L/25C from the east, meaning the aircraft approaches from the east-northeast. The left side faces south, giving views over the Rhine-Main plain, the Frankfurt skyline, and the Taunus hills to the north are behind you — left side catches the city center and the Main River bend clearly on final approach. Notable sights include: Frankfurt city skyline (Bankenviertel skyscrapers), Main River curving through the city, Rhine-Main flat agricultural plain on approach, Sachsenhausen district south of the Main.

The flight from Lisboa (LIS) to Frankfurt Main (FRA) takes Approximately 2 hours 35 minutes.

The route tracks northeast from Lisbon across the Portuguese interior, crossing the Serra da Estrela range (Portugal's highest mountains), then over the Spanish Meseta Central — a vast flat plateau — before crossing into Spain's Castile region. The Duero/Douro River valley is crossed in central Spain. Further northeast the route passes over the Ebro basin and the southern Pyrenean foothills before entering France over Gascony and the Aquitaine basin. The Rhine Valley and Black Forest are visible on the right as the aircraft descends into Frankfurt from the southwest.