My crack travel agent just told me that PDX has a RT fare below $200 to -- about 5000 miles RT for 4c/mile!
Also there's an S-class fare to London, about $480 plus tax(12,000 miles RT at about 4c/mile), but not upgradeable.
I don't know what the absolute cheapest fare from PDX is on UA. I suspect it's the UEx fare to Seattle, which must compete with Horizon.
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"If you want to win the game, write the rules."