Powerful winter storm threatens to disrupt busy travel day

A powerful storm making its way east from California is already throwing a wrench in Thanksgiving travelers' plans as Northeastern cities prepare for lots of snow on Sunday.

Roughly 55 million Americans are traveling this weekend. American Airlines is waiving change fees for flights routing through Boston and a number of other cities in the Northeast on Sunday and Monday. Boston is expecting close-to-record-breaking snowfall on Monday of up to 6 inches, CBS Boston reported.

Airlines had already waived rescheduling fees for many travelers routing through Midwestern cities.

Saturday saw more than 300 canceled flights, and cancellations have already started to roll in for Sunday, including eight at Chicago's O'Hare International Airport and six at New York's LaGuardia Airport as of Sunday morning, according to FlightAware.

Some travelers took to social media to air their grievances. A Twitter user named Wendy Swetz elicited a reponse from United Airlines after posting this message on Sunday morning:

"United airline literally ruined our day- they cancel my sons flight without notice, missed his flight and now we are stranded today!! Unbelievably horrific service and terrible customer service! #unitedsucks #unitedairlines."

Before moving east, the storm caused the death of at least one person in South Dakota and two children in Arizona. The storm closed highways in the western U.S., affecting travelers over the Thanksgiving holiday.

Forecasters warn that people traveling throughout the weekend should be aware of the storm's effects.

DELTA, AMERICAN AIRLINES WAIVE RESCHEDULING FEES AS WINTER STORM BLASTS US

The storm is expected to hit northeastern states on Sunday, bringing freezing rain and snow.

Here is a link to a Delta Airlines' current advisories. A full list of American Airlines travel alerts can be found here.

GET FOX BUSINESS ON THE GO BY CLICKING HERE

The Associated Press and FOX Business' Matthew McNulty contributed to this report.