The busiest international flight route is international route is Hong-Kong – Taipei, Taiwan: 6.5 million passengers travelled between the two Asian destinations in 2018 on almost 27,500 flights.
The busiest domestic flight route is Seoul-Gimpo – Jeju: 39,460 flights a year take 15.5 million passengers to Unesco-listed Jeju island for its mild climate, fantastic resorts and casinos.
The cruising altitude for commercial flights is 10-11 km
Flying is the safest mode of transport
In case of emergency, Passenger evacuation must take less than 90 seconds
The first 3 minutes after take-off and the last 8 minutes before landing is the most dangerous time to fly, this is when 80% of plane crashes happen.
Online Check-in was introduced by Alaskan Airlines In 1999
About ⅓ of your taste buds are numbed during flight