How about adding.....

[aircanada]

Stopovers at smaller airports on the way to your final destination

[thetallone24]

Yes this can work, but only with the right aircraft, and there needs to be
at least a reasonable amount of demand, say 100 pax per day for a 737 or such, and again you
need demand from that small airport, or the route will make pennies!

[Unbornio]

There is already such a feature...?

[thetallone24]

Sorry, maybe I mis-understood, thought you were talking about possibility of a route for your own airline, Unbornio is right, this is already possible to do.