Concorde supersonic jets are no longer commercially available. The Anglo-French fleet was retired in October 2003 due to:
When operational, Concorde flew London/Paris–New York/DC in ~3.5 hours (vs. 7–8 hours subsonic). A theoretical Los Angeles–Washington, D.C. flight would have taken ~2.5–3 hours at Mach 2, but Concorde never operated transcontinental U.S. routes due to sonic boom restrictions over land.
Companies like Boom Supersonic (Overture) and NASA (X-59 QueSST) are developing next-gen supersonic transports targeting 2030s entry, potentially reviving ultra-fast transcontinental travel.