I know how to do that math, or used to. It makes my head hurt to consider it now, so I believe I shall leave it alone forthwith :-)
Anyway the attraction really isn't trip time; it's energy cost. This is one of those high-capital, low-operating-cost things. Once the tunnel is in place, drop something in New York, pick it up in London.
And don't worry about the crust. Ashton and I are developing the matter-antimatter tunnel boring machines and the beta-unobtanium silicide tunnel liner; it'll be safe as houses. Trust us :0