Harsh weather costs airlines up to $100M

The storm and cold weather of the last week will cost the nation's airlines as much as $100 million in lost revenue and increased costs, according to an estimate from a leading airline analyst.

Helane Becker, airline analyst with Cowen and Co., reported to CNNMoney the weather caused some 20,000 flights to be cancelled nationwide, which she said was 5,000 more flights than were canceled in due to Superstorm Sandy in 2012.

"Going forward we believe the airlines will adopt a more conservative approach during storms," she said. "In the past, they might take a delay; going forward they will outright cancel."

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