Originally Posted by RobOnLI

To the OP - you can have the reservation agent break out the itinerary into two segments manually. They are very reluctant to do this. I recently was booked on NW 209 BOS-DTW-SEA (DTW-SEA wound up cancelling though). I could not, for the life of me, get any agent on the phone or at the airport to break out the flight into two segments. Many people on the board have reported success.
-RM