In-N-Out Burger has been serving the highest quality burgers, fries and shakes since 1948 – and they’re not stopping now! Their drive-thru is open from 10:30 a.m. to 1 a.m. Sunday through Thursday, and from 10:30 a.m. to 1:30 a.m. Friday and Saturday. For more information, guests can call 1.800.786.1000.