I'm trying to decide which program to credit my infrequent USAir (and possibly AA) flights to this year, and I want to hear MilePoint's wisdom. I'm a long-term UA customer, and my answer for years has been "UA Mileage Plus, to get EQMs toward status and get the perks of star alliance gold". I have reasonable balances in both Dividend Miles and AAdvantage, and I'm not accumulating toward any specific award in either program. I'm perhaps more likely to redeem from the US account because of the cheap F awards on domestic three-cabin service and the 5k discount from the Barclays credit card. I will probably fly too little on both carriers combined to even get first-tier elite status, though that's not entirely out of the question. I presently have status on neither AA nor US. Is there any advantage to one over the other? Is either more likely to play nice with TSA PreCheck?