The most difficult airlines riddles

KLM was founded in 1919. Operations stopped during World War II apart from the operations in the Dutch Antilles. The airline is the "Oldest operating airline", but with the 2004 merge with Air France some dispute whether KLM should still hold the crown. QANTAS, founded in 1920, is dubbed "Oldest continuously operating airline".

Delta Air Lines, Inc. (NYSE: DAL), commonly referred to as Delta, is a major American airline, with its headquarters and largest hub at Hartsfield–Jackson Atlanta International Airport in Atlanta, Georgia. In 2013, Delta Air Lines was the world's largest airline in terms of scheduled passengers carried (120.6 million).

The flight between Qatar-New Zealand takes 16 hours and 20 minutes. It is currently the longest pas­sen­ger flight in the world, operated by Qatar Airways.

The Korean Air logo featuring stylized "taegeukgi" design was introduced on 1 March 1984. The same symbol is used in the Korean Flag.

Airplanes fly at high altitudes because of the reduction in drag, and to get into the jet streams. The Polar Jet stream ranges from 23,000 ft to 40,000 ft. The subtropical jet stream ranges from 33,0000 ft to 50,000 ft.