United Business Class Upgrade
Posted: Sun Jul 13, 2014 9:58 pm
In a few years, my wife and I will be flying from MFR to AKL. Ideally we want to take Air New Zealand from SFO to AKL but will settle with UA connecting in Australia. How difficult is it to buy an economy ticket and then use miles to upgrade to either Business or First class at the time of making the reservation? We will likely be making the reservation about 6 months in advance.