The phrase "home airport" refers to the main airport nearest to where a person lives or where their journey typically starts or ends. It's the airport they consider as their base for most of their flights. Full definition
The flights you might take vary depending on home airport of course but I'll mention what I did here as it relates to a trend we've been observing the past few years whereby bank points are more useful than airline miles for domestic flights. (milenomics.com)