The best replacement for concorde is tu 144.

The best alternatives to concorde are rated as following:
★★★★★  tu 144
★★★  american career college
★★★  om
★★★  blackbird
★★  sr 71
★★  747
★★  300m
★★  boeing 747
★  lhs
★  gill
★  intrepid
★  tu-144
★  tupolev tu 144
★  tupolev 144
  pima
  concordski

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Speaking about concorde, one probably shouldn't forget about red arrows.

Other search terms related to concorde and their ratings are:
★★★★★ red arrows
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concorde
tu 144
american career college