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At a gate in Denver Int'l there is a United plane with 2 jetbridges. united777

Why do some airports have to put 2 jetbridges on a plane? Is it necessary?

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It is actually very common to put multiple jetbridges on wide-bodies. The A380 uses 3. – SMS von der Tann Feb 15 at 1:07
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Why do you assume that they have to? – David Richerby Feb 15 at 6:13
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Note that for instance EasyJet in Prague (PRG) uses a jet bridge plus it makes the passengers seated at the back of the place to go down on the tarmac and up by standard stairs. I believe this significantly reduces the boarding time whence the airport tax, which is quite large in PRG. – yo' Feb 15 at 8:42
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@yo' is the tax really time-dependent? Normally easyjet etc. want to minimise the turnaround time for their own operational reasons rather than anything external. – Chris H Feb 15 at 12:03
up vote 6 down vote accepted

So that economy class passengers can also see at least one of the higher classes (when they exit) and wish they booked that! :-/ Trust me you sure will wish that and that someday can mean more $ for the airline

enter image description here Source: Original picture was taken from this very question

Joking aside I have seen it happen on many airlines. The people on left Aisle go out from the first one and people on the right aisle take the longer route to exit from the gate that's closer to cockpit.

Primary reason must be to transfer people faster to make the jet available for crew as soon as possible specially after a landing when the jet has to fly again in an hour.

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Because most of the answers said the same: "to make the boarding prodecure faster". In this answers he explains where people embark and disembark the aircraft and which jetbridge they use. – kepler22b Feb 15 at 15:42
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If you want I can accept other answer rather than yours... – kepler22b Feb 15 at 15:44
    
No no why would i want that? I was just positively surprised so that's why i asked because i thought my answer wasn't worth that. – Hanky Panky Feb 15 at 15:44
    
This answer is inaccurate or, at least, incomplete. I've never seen dual jet bridges used in the way described here. On all occasions that I've boarded a plane that had two jetbridges attached, all economy passengers went through the rear jetbridge, presumably to avoid disturbing the people in the fancy seats by having half a planeload of people trog past them. – David Richerby Feb 16 at 6:32
    
So if you have never seen that happen that means that is inaccurate? I have recently seen it happen twice, once at KUL and once at BKK. And those fancy seats people offload before not so fancy ones do. Both on TG. – Hanky Panky Feb 16 at 6:37

It is not strictly necessary. But it is done in order to save time.

  • More points of passenger loading leads to faster loading, potentially reducing delays, airport charges etc.

  • In some cases, there is a seperate jet bridge for first/business class.

  • For large aircraft like A380 etc, is quite common to use multiple jet bridges as use of a single one may lead to quite large loading time.

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Also, some planes have more than one floor for passengers and they might not want everyone to go through the narrow stairs. – Stephan Branczyk Feb 15 at 5:43
    
@StephanBranczyk exactly; not a big deal for 747 (though you don't want your upper floor/class passengers to have to climb) with it's handful of seats on the upper deck, but in the 380... – yo' Feb 15 at 8:40

The reason they use 2 or sometimes even 3 (A380) for wide-body aircraft (I have seen 2 on a B757, but that is rare) is because the more entrances to facilitate faster boarding and unloading passengers from the airplane. It saves much more time than loading the plane from one jetbridge and in the case of the A380, there are 2 full wide-body decks to fill. Passengers also like getting on and getting off the plane quicker as well.

Interesting that there is this similar question on travel.se

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Believe it or not, a decade ago, Southwest experimented with using two jet bridges for boarding 737's at the Albany NY airport. It really did make boarding faster but I haven't seen done recently. – Brian Borchers Feb 15 at 15:37
    
Correct of course, but it does not address the basic simple confusion on the question -- they certainly don't "have to" use >1 bridges. But it's a wonderful luxury. You may as well ask "why do planes have to more legroom" you know! heh. – Joe Blow Feb 15 at 20:00

In addition to Aeroalias' answer, some airports adopt a Multi Aircraft(Apron) Ramp System.

The gate may be used by multiple small or a single large aircraft. It allows airport planners to make their gates more flexible and efficient. In such a case two or more jet bridges are needed for a single gate.

Some of the busiest airports including Beijing Capital, London Heathrow and New York JFK have already adopted such a system.

More details can see this article.

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