At PDX, bids tend to last about six weeks. You can bid for different runs, but it's going to depend on seniority as to whether you'll get to do something different. There tends to be some regular movement as people get bored/fed up with doing certain runs and switch things up. However, the PA-31 cargo runs tend to stay senior.

Other PDX notes: I saw someone suggesting that upgrade times might be better than OAK, but I don't think so. PDX is very overstaffed on turbine pilots right now- some may have to requal in the PA31. The only fast upgrades I've seen in the past year are people taking outstations or going to other bases to fill outstations.

*shrugs* Everyone seems to want to stay in PDX.