YYZ
2 1/2 crews per aircraft seems a bit short, although i will conceed that it really depends on how much the a/c flies. I would have thought for ryanair's needs it would be closer to 4.5-5 crews per aircraft (i.e. 9-10 pilots per a/c). So assuming about 170a/c that equates to anywhere between 1530 and 1700 pilots in the whole company