Sit on the Left side of the plane for the best views on flights from Barcelona to Singapore. Left side wins at both ends of the flight. During the long cruise over South Asia, left also offers better views of the Bay of Bengal coastline and the Andaman Sea as the route descends toward the Malay Peninsula. Right side has some merit over the Indian subcontinent but left is consistently stronger.

During takeoff from Barcelona (BCN), sit on the Left side for the best views. Barcelona El Prat typically departs on runway 25L/25R heading west, then aircraft turn southeast toward the Mediterranean. Left side gives you the Barcelona city skyline, the Sagrada Família district, and the sweep of the coastline heading toward the Llobregat delta. Right side faces inland toward the Collserola hills but loses the city view quickly. Notable sights include: Barcelona city grid and port, Montjuïc hill, Llobregat delta wetlands, Garraf coastal cliffs to the south.

When landing at Singapore Changi (SIN), sit on the Left side for the best views. Changi Airport typically lands on runway 02L/02R from the south, or runway 20 from the north. On the common southerly approach over the Strait of Singapore, the left side faces east toward the South China Sea and the southern tip of the Malay Peninsula, while on the northerly approach the left side looks over central Singapore's skyline including Marina Bay. Either way, left captures the most dramatic urban and water geometry. Notable sights include: Marina Bay Sands and CBD skyline, Strait of Singapore shipping lanes, Sentosa Island, Johor Strait to the north.

The flight from Barcelona (BCN) to Singapore Changi (SIN) takes Approximately 12 to 13 hours.

After crossing the Mediterranean and overflying Egypt or the Levant, the route tracks across the Arabian Peninsula or Persian Gulf, then over the Indian subcontinent crossing the Deccan Plateau and Bay of Bengal. The Andaman and Nicobar Islands may be visible below before crossing the Strait of Malacca and the northern tip of Sumatra, then descending over the South China Sea toward Singapore.