World's longest nonstop flight: Airbus A350-900ULR set to enter service

Amazing advances in technology now let nonstop flights fly farther and cheaper for airlines than ever before. Many follow routes that take them near the North Pole as they whip over the top of the globe to the other side of the world.

But these giant intercontinental leaps present their own challenges: How do passengers and pilots deal with annoying and potentially dangerous fatigue that comes with marathon air travel? How do twin-engine planes figure into the future of longhauls?Let's start with the king of nonstop flights: Singapore Airlines Flights 21 and 22 between Singapore and Newark, New Jersey. The route is the longest both in distance -- about 9,500 miles -- and in time -- about 19 hours.

Source: CNN