Many airlines let you do just that with free or low-cost stopovers….
We use those opportunities a lot during our World trip …
For example, we flew from Paris to Boston with a 1 Week Free Stopover in Iceland
or flew from San Francisco to Tokyo with a 1 Month Free Stopover in Hawaii …
here in this article for example, you could fly from New York to spend five days in Rio de Janeiro then continue on to visit Buenos Aires for a week for about the same price as a round-trip to just one of those cities….
The opportunities are endless … But very few use them … WHY ?