The Last Flight of Noah's Ark (1980)

When Noah Dugan agrees to fly missionary Bernadette Lafleur and her cargo of animals to a remote island, its only because he is on the run from a couple of bookies. What neither of them know is that two of Miss Lafleur's young students have stowed away with the animals & Miss Lafleur's transistor radio has interfered with the plane's instruments and they're all now miles off course. After a forced landing on a remote island, Dugan, Bernadette, Bobby and Julie discover that they are not alone. Together with two Japanese soldiers who have been stranded on the island since WWII, they must turn the plane into a seaworthy boat if they are ever to make it home. When Bobby and Julie insist that they cannot leave the animals behind, the converted plane truly becomes a second Noah's Ark