(Portland, OR) -- Spirit Airlines will end service at Portland International Airport the week of October 2 as part of a broader pullback from 11 U.S. cities. The budget carrier, which filed for Chapter 11 bankruptcy again in August, said it is focusing on stronger markets to stabilize its business. Other cities losing service include Boise, Oakland, Sacramento, Salt Lake City, San Diego, and San Jose. Spirit said affected passengers will be offered refunds and thanked Portland for its support.