Multiple jetbridges is a thing. I've boarded a 787 in LHR over a secondary jetbridge (the first was for business class only). > Some airports with internationa

Multiple jetbridges is a thing. I've boarded a 787 in LHR over a secondary jetbridge (the first was for business class only). > Some airports with international gates have two or even three bridges for larger aircraft with multiple entrances. In theory, this allows for faster disembarking of larger aircraft, though it is quite common, especially on aircraft such as Boeing 747s and Boeing 777s, to use one bridge for only passengers in first class and/or business class, while the other bridge is for the use of passengers in economy class. In some designs, the second jet bridge would even extend over the aircraft wing, being suspended from an overhead structure. This was, for example, originally adopted for most wide body gates at Amsterdam Airport Schiphol. The Airbus A380 is unique in that both of its two passenger decks have outside access doors and so using loading bridges for each deck is possible, having the advantage of faster aircraft loading (in parallel). https://en.wikipedia.org/wiki/Jet_bridge#Advantages https://en.wikipedia.org/wiki/Jet_bridge#Advantages