Airbus A380 and Boeing 747 were the largest passenger planes ( double decker, four engine )
until they were both discontinued in the last 5 years as the industry has moved to cheaper single-deck, two engine planes. the largest Airbus in production is now A350 and the largest Boeing in production is 777X ( actually it is slated to start production in 2026 ).
despite being discontinued both 747 and A380 are still in operation and serve as a good benchmark for which airports are truly world class as most airports either can’t physically handle them or can’t attract them ( you won’t fly a plane that seats over 500 passengers and is designed for international flights to some west bumblefuck village ).
Below are the maps of all routes for both A380 and 747 so you can see whether your city is cool enough for these superjumbos.
source:
https://www.flightsfrom.com/a/a380-747-route-map
A380
747
the A380 commercially failed almost immediately ( due to being too big ) and is really an extreme test for airports.
the 747 had a pretty good run but the era of superjumbos simply came to an end.
this is why you see about twice as many airports / flights serving 747 than A380. while both are double deckers the A380 is full double decker whereas in 747 the upper deck is partial.
all modern jets are single deck, two-engine. ( both 747 and A380 are four-engine ).
in other words any airport that can accommodate these monsters will be EASILY able to accommodate any modern aircraft.
additionally A380 seats about 500 passengers, the 747 seats about 400 passengers and modern aircraft seats about 350.
so you see the 747 was just slightly over-size and was retired mainly due to the cost of four-engine configuration. whereas A380 was retired due to its sheer size.
the cost of A380s four engines could be justified if 500 seats could be filled, but that’s a big if, plus the wing span of A380 was prohibitively large for most airports. in fact the new Boeing 777X has folding wing tips ( see image below ) precisely so it doesn’t suffer the fate of A380 which couldn’t get close enough to airport terminal to load and unload passengers due to too-long wings.
in other words an airport handling A380s is more a status symbol for airport than a practical benefit, while it handling 747s is more of a tangible assurance that it will also be able to handle any modern aircraft, because 747 was just slightly larger than the upcoming 777X which should become the standard of international air travel if Boeing can actually produce it ( it has been delayed for years ).