Global airlines are governed by strict 'freedoms of the air' dating back 80 years. They've created some funky routes.

12.04.2024 - 09:03 / insider.com / United Airlines / Airlines

Over the past 100 years of shuttling people around the globe in metal flying machines, the world's aviation network has grown into a vast web of intersecting routes that connect nearly every corner of the globe.

Because of the complexities of crossing international borders, commercial carriers follow what is known as the "freedoms of the air" — or the right for an airline to operate within a nation other than its own.

These building blocks of aviation make international connectivity possible. 

According to the International Civil Aviation Organization, or ICAO, there are five official freedoms and four other "so-called" rights, that have been outlined in agreements between countries. ICAO is an agency of the United Nations that sets standards for the global aviation industry.

Drafted in 1944 during what is known as the Chicago Convention, the laws were written as world governments relaxed their grip on airline networks and pricing. This liberalization, however, meant countries with bigger airlines would likely dominate the skies — prompting ICAO to implement strict route regulations.

The governing freedoms not only promote more competition and choice but also allow airlines to optimize routes and increase efficiency, according to FlightRadar24. 

Most international carriers except for a very small few follow the basic freedoms of allowing airlines of one state to fly over or land in another, and vice versa.

Open Skies agreements simplify these international routes, like the one between the European Union and the US that allows any airline registered in either market to fly between the two.

Some freedoms are more complicated, but provide interesting and diverse route options to travelers.

Beyond the first four freedoms, there is one more officially recognized right, as well as the four"so-called"rights. The latter four were not officially drafted during the 1944 Chicago Convention but are regularly accepted and practiced worldwide.

According to ICAO, the fifth freedom gives an airline of one nation the right to fly between two other countries, so long as the one-stop routes start or end in its home country and all parties agree.

Among the most well-known fifth freedom routes are Emirates' flights from New York-JFK to Milan and Newark to Athens, both flying onward to the carrier's base in Dubai.

Similarly, Singapore Airlines flies between New York and Singapore via a stop in Frankfurt, and Australian flag carrier Qantas flies between Sydney and New York via Auckland, New Zealand, according to Google Flights.

United Airlines' delayed fifth freedom route will fly between the US mainland and Cebu, Philippines, via Tokyo starting in October, the carrier told Business Insider on Monday. It was supposed to