Spirit Airlines is preparing to pull out of Portland along with at least 10 other cities as part of its latest bankruptcy restructuring, according to Aviation Week. The carrier, which filed for Chapter 11 protection for the second time in less than a year, will also stop flying to Albuquerque, Birmingham, Chattanooga, Columbia, Oakland, Sacramento, San Jose, San Diego, Salt Lake City, and Boise. The airline said its operations will otherwise continue during the restructuring, allowing...