I used to fly regional from Norcal to SEA to position for low fares to Europe. Separate tickets with all that implies. I typically left myself 3 hours to reclaim from domestic, go landslide, check bags for the Int'l. flight, and return through security with Precheck. I did this three times and always had an hour lounge time. One note. I booked AS for the feeder. They have this 20 minute reclaim guarantee which they seem to accomplish at their SEA operation.