'Egress' is also an option; however, I am not so sure if it is that commonly used. OED gives the following two examples, among others.
1870 E. Peacock Ralf Skirl. I. 13 The other door which afforded egress into the small court.
1874 Helps Soc. Press. iii. 43 What should prevent the ingress‥of noxious trades, or facilitate their egress.