PSA wont let you move any days around at all so no for here.

My company you get 10 days off per month on reserve. Technically you are allowed to move the days off, but only if reserve coverage is good...which it never is so effectively you are stuck with 5 on 3 off 6 on 2 off etc for the month. If you get super lucky you can move maybe 1 day off a month, but thats it. Even when you hold a line it is pretty much impossible to load you schedule up to the point where you will have more than 6 days off in a row. So at best you would spend 3 or more weeks at the crashpad and then get 12 or so days off and most lines aren't built with many days off on the front side of the month, so really you would only get closer to 8 or 10 days off in a row.

Most of the time your trips will start early and end late so you always have to commute in the day before your trip and commute out the day after your trip so days at home will be more like 6 to 8 a month.

There's nothing about 6 days in a row in the FAR's, just that in 7 consecutive days there had to be a 24 hour free from duty period in there.

See above. The FAR's only reference a 24 hour period. However, a CBA may be more restrictive and make make reference to a "calendar day" free from duty in a 7 day period.

A few months ago in the month to month transition I was scheduled for NINE consecutive days of duty. A 4 day, 1 day, then a 4 day, with a 24 hour gap between the 1st 4 day and the day trip. They way crew planning modified the line, it only got to within 1 hour of a 30/7 issue. This most recent one had 7 consecutive days scheduled with 25 hours free from duty between the first and second trip.

Some airlines will schedule 7-8-9 days of consecutive reserve with the contingency that they will have to give you 24 hours free somewhere, but it's not the norm.

Okay, if we want to get THAT technical we can, but the OP was trying to get an idea how flexible scheduling is.

Yes, if one had a six day trip followed by a stand up, six day, stand up, and a four day with 24 hours before and after the stand ups, then yes, one could do 20 calender duty days in a row.

Spool down turbo, wasn't trying to be "that technical" about it.

People often confuse 24 hours free from duty with a "day off". Especially when there in NO provision in a CBA that distinguish the two.

And for the OP, I wouldn't count on scheduling being that flexible at all. Especially if you get hired at a smaller company, or the domicile you get is small and doesn't have much flying to trade/drop for.

Let alone the typical regional type schedule where you may have 1 day off but at a minimum need 2 to prevent 30/7 issued. Notice I said typical, I KNOW there are some super inefficient places out there that scatter 1 day off between a 12-14 hour 4 days (as an example) regularly.

You are right a lot of people do forget that 24 hours off doesn't mean a calender day (unless something more restrictive IE a CBA covers that). I remember a few years ago where I was on the road for 3 straight weeks cause I would get a few 25 hour overnights. I don't even now why I dragged my overnight bag around with me at the end cause all of the clothes were dirty since the hotels didn't have a laundry mat.