The Department of Transportation released its final numbers for airline baggage fee revenue from 2010 and Delta has sent a very loud message to the rest of the industry: Y’all got a lot of catching up to do.

According to the DOT, Delta took in $952 million in baggage fee revenue in 2010, just shy of double its 2009 take of $481 million. And the rest of the airline industry, while continuing to increase its baggage fee revenue, has not kept pace.

Delta’s revenue alone accounted for 28% of the nearly $3.4 billion brought in by the 20 airlines in the DOT’s study. American and U.S. Airways still placed second and third, respectively, but their $580 million and $513 million were completely overshadowed by Delta’s accomplishment.

A decent chunk of Delta’s increase can be attributed to its now-completed merger with Northwest (ranked #4 in 2009), but its total still dwarfs the combined $654 million of United and Continental.

Overall, baggage fee revenue was up about 24.4 percent from 2009.

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