CLT <=> SEA has jumped in price as well, not sure if that correlates to a seasonal change or not, but the flights used to be about $370 RT but if you don't do saturday over they're now over $700 RT! Going to Sat => Thursday drops the price into $4xx or so but it's still painful because they have a monopoly on that route (and the flights are always full -- as a Gold I've had 0/8 upgrades this year whereas as a silver last year I'd get the upgrades about 20% of the time).