MINNEAPOLIS – Half of the flights in and out of the Minneapolis-St. Paul airport have been cancelled due to the gigantic storm over the Upper Midwest. More than 400 Wednesday flights, mostly Delta and Sun Country, were cancelled. Kyle Potter, editor at Thrifty Traveler, which tracks such things, said 200-plus flights already were canceled for Thursday. The number will grow, he said. He didn’t expect full operations until at least the weekend because the airlines’ complex hub networks mis-position aircraft domino-like everywhere.