Originally Posted by
Yarons
Correct, for DL Premium Select the domestic legs book into First
Most of the time, but not always. There has to be G bucket on married segments to get a First class G fare on the domestic flight. Sometimes there is no G bucket availability on the domestic segment and it will still give you G on the international segment, but a coach B fare on the domestic segment.
Also, PS is only available via DTW currently. If you book through SEA, you will be getting a C+ W fare which is not premium economy and which earns no class of service bonus.