We fly technicians around to do skilled work on our equipment. 6 times a month is on the high side, but not unheard of, more typical is fly 3-4 RTs and be away from home for 3 weeks. They're often hourly and aren't even allowed flexibility to stop between the airport and hotel check-in for food. My travel varies a lot with project and project stage - Years ago I was sometimes flying an RT transcon every week or two for a few months, with shorter and occasional TATL travel mixed in. Then without much conscious thought it morphed into very little travel for almost a decade, then ramped back up to a lot of local travel, plus a lot of transcons and 30-40 days away from home. I managed to dump that for a while, and now it's creeping back up - some of my management would like to see me traveling much more, but fortunately I get to make most of the travel decisions on what I'm doing.

There are also a lot of specialized equipment repair techs and installers who are basically on the road all the time, but don't have spectacular salaries. I interviewed for one for a scientific equipment manufacturer a few decades ago. The pay wasn't anything special, but at the end of the week they'd fly you anywhere you want for the weekend (home, skiing, the beach, whatever) and then off to some new work site at the start of the next week.