Seriously consider a pilot slot in the ANG or USAFR. If you're interested in serving anyway, may as well go that route if qualified.
After your initial active duty for training (two, maybe three years), you can revert to traditional part-time reserve duty and get a job at a regional airline. Then you'll be progressing your career on both military and civilian tracks in parallel. You'd pretty much have your pick of the best major airline jobs when you have some flight time.
With military wings, you'll qualify for majors with less flight time than a civilian, and it's more of a sure thing to get called with mil experience (some civilians do all the right stuff, still never get called, and stay a regional for life).