Starting from any commercial airport, can I reach any other commercial airport in the world with just scheduled passenger flights?
A commercial airport being any airport that has regular scheduled passenger flights.
The mathematics of this question got me thinking: is the network of scheduled flights a connected graph?
That is, is there a pair (or triplet or even larger set) of airports such that they only have scheduled flights with each other? Or can you get from any airport to any other?
Ignore vagaries like cargo and general aviation. I'm looking for two airports that I can shuttle between, but would have to drive (or sail) to get to one or the other of them.
Best Answer
The Nouvelle Calédonie domestic network, operated by Air Calédonie and Air Loyauté with a hub on the Nouméa Magenta Airport near downtown Nouméa, and serving a dozen or so smaller airfield, in Nouvelle Calédonie or nearby islands does qualify.
The Magenta airport page lists more than 20 departures for next friday (11/10/2019), most of them using ATR 72 so it is not just a glorified general aviation network.
Links to global scheduled flight "connected graph" (i.e. flights to other french territories and to foreign countries) are scheduled from La Tontouta Airport, 50 km away by Aircalin and other airlines. Local ones are not allowed to land on La Tontouta Airport.
Both maps are from the CCI-CN website
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Answer 2
Arkhangelsk has two airports: Talagi, which serves Moscow & St. Petersburg, etc, and Vas'kovo, which serves towns and villages within the region. It also does helicopters. As with already existing answer, there's 20 km between these two.
Also, Reykjavik airport (the small one) mostly serves airstrips in Iceland, which makes it unconnected. Or maybe occassionally connected via e.g. Greenland.
I think this is a very popular pattern out there.
Answer 3
Like some other users, I found this question via another one that has been closed already, today.
There are three to four planes daily from German island Helgoland to Heide/Büsum. Flightradar dot com does not list this service, but I believe it still qualifies as a scheduled service. However, there's no commercial service leaving HEI/EDXB.
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