Airlines are already taking precautions ahead of the winter storm threatening the East coast.

Delays and cancellations are already being reported at Logan airport.

Airlines canceled 2,800 flights Friday to, from or within the U.S., as a blizzard swings up the East Coast, according to flight tracking service FlightAware.

The bulk of Friday’s cancellations were in Charlotte and Raleigh, North Carolina. Another 3,200 flights were canceled for Saturday. Those cancellations center around Philadelphia, Washington D.C. and — to a lesser extent — New York.

By Sunday afternoon, however, the airlines hope to be back to a full schedule .

All major airlines have issued waivers for travel over the weekend, allowing passengers to rebook onto earlier or later flights to avoid the storms. For those stuck at an airport, consider calling customer service even as you wait in line to speak to a representative. Also consider sending a tweet to your airline.

Friday morning flights from Boston to Baltimore and Raleigh-Durham, North Carolina were already canceled.

Massport issued a statement on the winter weather.

“As a major winter storm moves up the East Coast, flights in and out of Logan from the cities affected by the storm are being canceled by airlines. More than 100 flights are canceled today to and from the following airports or cities: the three Washington DC area airports, Charlotte, NC, Raleigh-Durham, NC, and Richmond, Va. Airlines have told us that as the storm moves up the coast, flights to and from the Philadelphia and New York area will be impacted. Massport urges people traveling to Logan to call their airline on flight status before heading to the airport.”

American Airlines said it was canceling all flights in Charlotte Friday because of the storm, and that it would cancel flights in Washington, DC and Baltimore Saturday.

United Airlines announced it would start suspending flights in Washington, DC Friday afternoon.

Many airlines are letting customers change their flights without additional fees. All travelers are urged to call ahead before going to the airport.

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