An airplane cruises at \(880 \mathrm{~km} / \mathrm{h}\) relative to the air. It is flying from Denver, Colorado, due west to Reno, Nevada, a distance of \(1200 \mathrm{~km}\), and will then return. There is a steady \(90 \mathrm{~km} / \mathrm{h}\) wind blowing to the east. What is the difference in flight time between the two legs of the trip?