It doesn’t always make sense to use miles or points for a domestic ticket. You have to compare the price of the ticket to the amount of miles you would have to use for the same route. But beware of the extras you would have to pay if you are comparing the price of a ticket on one of the legacy carriers to one of the ultra low-cost carriers (ULCCs).

Frontier Airlines has some ambitious expansion plans for 2016.

Starting this spring, the discount carrier will add a plethora of new routes to cities where it sees unrivaled potential to undercut the industry’s biggest players.