One - way upgrades cost 25 percent of the miles required for a round - trip business class ticket. (rewardexpert.com)
You'll notice in the chart above that there isn't a big difference in the taxes and fees on a round - trip business class award and an economy class award. (upgradedpoints.com)
A round - trip business class seat on one of these routes costs 200,000 miles, while first class tickets are 300,000 miles. (rewardexpert.com)