Hi —
I have stored up a ton of United Miles which I keep not using because I am never sure if using them is a good deal
I need to go to Japan next month and saw one option at 170,000 miles (on ANA) and another at 250,000 miles. I have enough for either but am never sure if there’s some other case where it will be just 75,000 or something
is there some algorithm to figure out if it’s worth using the miles by looking at fare cost (in dollars) vs miles cost (in miles)?