Air France does have chartered flights abroad their Concordes to few asian airports. One of the Concordes can be seen at Hong Kong's Chep Lap Kok airport. There are several photos showing Air France concorde landing at this airport. You can find them here.
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Photo © Y.K. Cummins NG
It is taking off at Chep Lap Kok...
It is very rare to see the Concordes at any major Asian airports.
Political reasons were involved when SIA flew Concorde flights from London to Singapore in 1979-1980. Such reasons were complaints from Indonesia and Malaysia over noise generated from the Concorde. Only one Concorde was flying over Indonesia and Malaysia. I do not understand why they made the fuss. There is really no differences from F16 fighters flying over these airspace. This really killed the supersonic flight from Singapore to London!
The other reasons - SIA finds it very expensive to operate the Concorde - it needs alot of fuel. The ticket to fly on the Concorde cost the bomb - leading to low number of travellers - only rich people could afford in late 1970s.
SIA Concorde operated from Paya Lebar International Airport (before all international flights are shifted to Changi International Airport in 1981). So far Changi does not have any known chartered/scheduled flights on the Concordes prior to grounding all the Concordes.
I really wish to see last surviving supersonic plane to make a few last rare trips to Changi before the last Concorde ceases taking to the skies.