跟飞机和巴士没有关系,根据移民法规和条例 R190(3)(f):
To re-enter Canada following a visit SOLELY to the US/St.Pierre and Miquelon.
操作指南上明确指出:
persons who have been issued single-entry visas and are still
within the period authorized for their stay in Canada may travel to the U.S. and back. They will not have to obtain a second temporary resident visa to re-enter Canada.