We call them turns. There used to be a few turn lines in the monthly bid packet but it seems there are fewer now. The turn lines go ultra-senior. On the F/O side it is usually a Lance who bids it to give them away and then pick up CA trips. There are also some monthly lines that have a turn day or two attached to a 2 or 3 day pairing.

The most common way to get a turn in my base is to pick one up from daily or monthly OT, TTGA, ELITT, VJA, etc. Sometimes these can be a great deal (lots of money for a day's work). For example, a lot of our supplemental flying is posted for bid as a turn. Of course the charter work goes real senior due to a higher pay rate. In the end as with most stuff, it's all based on seniority. The more senior you are, the more likely you will fly turns.