There is so much to learn about the aviation industry that it's not only limited to being a type of transportation.  Did you know the ATA Airlines has the highest number of rich travelers transported between Tabriz and Tehran? Listed here are five things you should know about air travel.

Busiest Air Route. Can you guess what flight route is the most in-demand? According to The Telegraph, the 280-mile flight from Seoul Gimpo International to Jeju International tops the list with more than 11 million trips in the year 2015. Jeju is considered one of the most popular holiday destinations with its underground caves, volcanic landscapes and picturesque beaches. It is followed by Sapporo to Tokyo. 

Biggest Airlines. This category is judged on different bases. American Airlines is the crown contender when it comes to revenue, passengers carried, fleet size and destinations served. But it can't beat Turkish Airlines when it comes to the number of countries served due to its strategic location that crosses the big continents such as Europe, Asia and Africa.

Busiest Airport. According to World Airport Guides, the Hartsfield-Jackson Atlanta International tops the chart as the most hectic airport since it serves the major domestic carriers such as Delta Airlines and AirTrans Airways.  It also offers a wide array of restaurants and bars, fully-equipped up-to-date business centers and parking areas close to the main building. 

Fastest Growing Airline. It also good to know that some small scale airline companies are also given the credit they deserve. IndiGo Airlines placed first on the list with its growing number of passengers since 2015. Also, Dubai is noted as the fastest growing airport followed by Shanghai Pudong.

Oldest Airlines. The oldest airport operates since 1909 and that is no other than the College Park Airport in Maryland. It is tailed by KLM which founded in 1919 and third place goes to Aeroflot which was founded in 1923.

So when you're in an airport or aboard the plane, it's nice to know more about the facts and trivia each can offer. It also reflects the rich history and work discipline each airline company upholds.