Spirit Airlines, a budget carrier, may not be the most popular airline — but it is among the safest. It's also one of the best airlines for finding low prices on last-minute flights. But even with its strong safety record and bargain fares, the airline is facing financial woes that are forcing significant changes. It's not exactly clear at this time what routes are being reduced, but the move continues a trend we've seen with Spirit Airlines. However, apparently, those routes weren't popular enough to continue, and they were also axed in October.