Helicopters have been whisking the wealthy from Manhattan to New York’s airports for decades. Now the ride costs as little as $195, and you can book it via a smartphone. Back in 2014, when Rob Wiesenthal founded Blade Urban Air Mobility Inc., a chopper ride to John F. Kennedy Airport—13 miles from Manhattan—started at $3,000, he says. Wiesenthal has been able to chop that price after finding efficiencies in fueling, equipment, and scheduling.