Whereas carriers provide positive space tickets to and from home with provisos for replacement crews coming in to crew the airplane. As a rule, your travel home may be delayed should the inbound crew experience a delay, thus putting your plans off. This inconvenience usually results on overtime pay. The company does not want any potential revenue flight, rightfully so, uncovered. I’ve made it a point to have flight following to email / text me an official release to travel home earlier than stated on my roster.