Serious question, here….
Are they still, y’know, a thing?
The Byrne-era characters are all still around, but whether or not Alpha Flight in its traditional role as government-sponsored team still exists is in question. During their (dreadful, horrible, longbox trash) last series, the team had something of a falling out with the Canadian government, as tends to happen when said government has been established as the most consistently evil governing body in the entire MU and tries to brainwash said team into a more docile state of mind. At the end of the story, it was implied that the team had returned to their heroic status.
However, the most recent Flight team observed working for the Canadian government was a new Omega Flight team (who had the dubious honor of having the shortest intro-to-kill time on record yet for a Flight team) with no sign of Alpha Flight. So either the Canadian government is using multiple Flight teams again, or Alpha Flight finally got a clue and decided to stop coming back for more punishment.
So far as individual members go:
Northstar - Living in New York with his new husband; currently in Astonishing X-Men
Puck - Currently appearing in Uncanny X-Force
Aurora - Assisting her brother in running Northstar Sports; still with Alpha Flight
Vindicator - Brainwashed, on the run with her and Guardian’s daughter, whereabouts unknown
Madison Jeffries - Affiliated with the X-Men; whereabouts unknown
Guardian, Sasquatch, Shaman, Snowbird, Marrina - Still with Alpha Flight