Airlines and travel experts are warning that a move by federal authorities to throttle back the number of flights at 40 major airports starting on Friday could disrupt people's travel plans across the U.S.

"Even if you're flying out of an airport that doesn't have reductions, there will be a domino effect across the entire system," said aviation expert Julian Kheel, CEO of travel booking site Points Path, adding that passengers should prepare for "significant flight disruptions."

One airline chief executive urged customers to buy a second ticket from another airline in case one flight is scrapped — a workaround that some travelers could see as beyond their means.

"If you are headed to a wedding, funeral or something you must be somewhere for in the next few days — given the risk

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