2CELLOS has announced a 3 part US tour. Each section is about 12 days long.
Tickets for all concerts are listed on the 2CELLOS website: 2CELLOS.com/tour. Most venues have tickets available for sale as of 20 January 2017, with a few still pending final venue decisions before they become available.
NOTE: One concert on the tour appears to have been omitted from the 2CELLOS website; that concert is in Saratoga, CA, south of the Bay Area, on 20 July. While it is sold out at the ticketing site, tickets are available on the secondary market.