Editor’s note: Sign up for Unlocking the World, CNN Travel’s weekly newsletter . Get news about destinations, plus the latest in aviation, food and drink, and where to stay. CNN  —  Travelers booking seats on what’s currently the world’s longest nonstop commercial flight will have more luxurious options to choose from in the not-so-distant future. Singapore Airlines (SIA) — voted the world’s second-best airline in 2024 by Skytrax —recently revealed a multi-year 1.1 billion Singapore dollars (