Originally Posted by
Marysmith0901
First off, for your airport dilemma, try typing the airport name instead of the code and hit up SQ.com for help if you're still stuck. Second, normally United Airlines charges 12.5k-25k miles for a domestic flight, but it could be different depending on the situation. It's possible the one-way flights you're eyeing cost 28k miles due to scarcity or other factors out of your control.
As this is *A redemption, the awards levels are fixed - 14K o/w within N.Am. The range you are providing is for redeeming on UA directly.