The numbers cite each carrier's cancellation and mishandled baggage rate for July 2007, the most recent month for which data is available, plus average on-time performance from July 2006 to July 2007.

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The carrier is already experimenting with self-service baggage check- in.

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The carrier has placed large orders for new replacement jets and stepped up baggage scanning to improve accuracy.

WSJ: The Leader in Lost Bags, Canceled Flights

For every 1, 000 passengers, 3.5 lost baggage, more than the national average of 3.2 and worse than every big carrier but American.

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Among the carrier's recent initiatives, she said, is working with DFW Airport to rebuild the baggage transfer system at its terminal, a process that's in bidding right now, while modifying the Embraer so it can carry more weight.

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