With LED being so close to the inner city, I've always enjoyed flying. The Russian rail experience is a great one as you get to take a trip back in time...the Sapsan is great too in terms of speed and ease of travel.

Flying for me though gets the win, 1hour in the plane is great and with competition being so fierce for the MOS-LED route, most airlines do a great job of getting you in and out effectively. FWIW, SU is the tops for this route.