Midwest Airlines, a Milwaukee-based carrier catering to business travelers with low fares, recorded the heftiest passenger change fees as a percentage of passenger revenue.

WSJ: Airline Cancellation Fees and Penalties Are a Big Business

By contrast, the airline with the worst holiday arrival record for the past three years is Midwest Airlines, which is in the process of merging with Indianapolis-based Frontier Airlines.

FORBES: Magazine Article

The worst, aside from Midwest: Georgia-based Atlantic Southeast Airlines (72.2%) and Wyoming's Great Lakes Aviation (71%).

FORBES: Magazine Article