Delta Airlines and Northwest Airlines, the third and fourth-largest US airlines, filed for bankruptcy protection from creditors on Wednesday. Together with United and US Airways , four of the seven biggest US carriers are now operating under bankruptcy protection, representing 51\% of US passenger flight capacity. The filing occurred due to rising fuel prices, high labor expenses and competition from low-fare carriers .
Delta Airlines and Northwest Airlines, the third and fourth-largest US airlines, filed for on Wednesday. Together with United and , four of the seven biggest US carriers are now operating under bankruptcy protection, representing 51\% of US passenger flight capacity. The filing occurred due to rising fuel prices, high labor expenses and competition from .
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bankruptcy protection from creditors
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US Airways
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low-fare carriers