Boy that certainly was true Friday afternoon for the Florida flights; Delta had to bus passengers between concourses.
To answer your questions, Modesto:
At present, Delta has 47 daily mainline departures from Boston. Of those, 12 are Delta Shuttle flights to LGA
and 3 at present are song. By mid-July, Delta will reinstate 4 daily Shuttle flights (for a total of 16) and all non-stop Florida flights (Orlando loses one daily flight, leaving 13 flights of the current 14) will be song, giving Delta 50 daily mainline departures.
Mainline destinations (including Shuttle and song) are:
, BDA, FLL
, Orlando, TPA
Delta has 3 gates in Terminal B (B1-B3) which are used mostly for Delta Shuttle to LGA
and Comair to DCA
. In Terminal C, they have C41 and C42 which are mostly for Delta Connection; C26, C28, C29, C31, C34, and C36 in the concourse shared with CO
; and C20 and C21 in the United/Air Canada Concourse -- these two gates are currently branded for song. The map on Delta's web site isn't terribly accurate. Note that in roughly two years (maybe) Delta will move all of its operations to the new Terminal A.
(Yes, I know what the code for Orlando is, but the darned abbreviation code is $%#$!@ing the message up)