According to Boeing's website, "the 747-400ER is now the largest and fastest commercial airplane in the sky - cruising at Mach 0.85, or 85 percent of the speed of sound."
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At the moment it is the Boeing 747-473 (747-400) operated by Air India. However, Air India placed orders for more than 50 aircraft in 2006 (most have been delivered) including the Boeing 787. The Boeing 787 Dreamliner, when it arrives in Air India in late December 2011, will be the fastest passenger plane in India.
Yes, the Concorde was one of the fastest commercial airplanes ever made. It had a cruising speed of around 1,350 mph (2,180 km/h), which allowed it to fly at supersonic speeds, faster than the speed of sound.
air force one is the designation given to any plane the president is on. If you mean the usual plane, it is a converted Boeing 767. The plane that holds most records for speed and time\travel is known as the SR71 Blackbird. Actually the president's usual plane is a converted Boeing 747 called a VC-25, and the SR71 Blackbird is the fasted air breathing plane, so there are other unmanned rocket powered planes that can go much faster and much higher
The fastest one that has actually been built and flown is probably the Russian Yakovlev Yak-141 (also known as the Yak-41). This was capable of 1800 mph. The project was cancelled and didn't enter service.
The New York Central Railroad's Empire State Express set the record for the fastest long-distance train in the world in 1893, reaching a speed of 112.5 mph (181 km/h).