Most are 12, Mesa is 13.
Remember, FAR block time is simply that, FAR block time. That is not what your pay is based off of.
I think when most people talk about how many hours they worked, they are referring to
credit hours. Back in Feb I had a 2 day trip where I FAR blocked 0.7 for the entire 2 days (mx) but was paid almost 10 hours.
The next month I FAR blocked 59 hours for the whole month, but was paid for 107.
Like it was mentioned above, work rules help improve your credit time. Generally, the better airlines have more ways to increase your credit time without increasing your block time.
For me, it's about flying the least amount possible but getting paid the maximum. I have enough hours right now. I just want the money
.