$UAL is trimming about 5% of its scheduled flights over the next two quarters as rising fuel costs hit the airline industry hard. The move comes as oil prices spike due to Middle East tensions, with jet fuel costs nearly doubling in recent weeks. Instead of flying unprofitable routes, the airline is cutting weaker demand flights and leaning on higher ticket prices to offset costs. Demand is still strong for now, but if oil stays elevated, it could continue to pressure margins across the entire airline sector.