Little America (around 2:27) was a series of exploration bases on the Ross Ice Shelf in Antarctica. The gag here is that it was hardly a pleasure destination for tourists.
Avalon Bay, "Home of the flying fish" (around 1:05), is in Catalina Island, California.
"Swedish American Line / Direct to Norway" (around 0:34) might seem to be an offbeat gag, but there really was such a passenger line, and it did make port calls at Oslo.
"Flat-Foot Flooji" (around 1:13) refers to "Flat-Foot Floogie", a jazz song of 1938, the same year as the cartoon.
The Thousand Islands (around 3:47) are an archipelago in the Saint Lawrence River. The visual gag involves jars of Thousand Island salad dressing.