Winter Storm Janus is just beginning but it has already caused thousands of flight disruptions around the United States. Those traveling to, from and around the Northeast should brace themselves for a travel headache.

As of 8:30 a.m., more than 2,100 flights into or out of the U.S. have been cancelled and more are being cancelled throughout the day, according to FlightAware. An additional 215 flights are delayed. As the storm intensifies, more disruptions occur. Airports from Washington D.C. all the way north through Philadelphia and Boston will be impacted.

A majority of the airlines that are impacted include ExpressJet with 219 cancellations and JetBlue with 205 cancellations. Major airports that are affected include Baltimore/Washington (BWI), New York LaGuardia, New York JFK, Newark Liberty, Philadelphia, Washington Dulles and Washington Reagan National. Most of these airports had at least 20 percent of flights cancelled and Boston Logan airport was bordering this percentage as well according to FlightAware.

According to USA Today, almost every large carrier operates a hub at at least one of those airports. For instance, United has two hubs at Newark Liberty and Washington Dulles airport. Delta is based at LaGuardia and JFK. JetBlue and American also have hubs at JFK.

Many major airlines have already agreed to waive flight rebooking fees for travelers using the airports that will be impacted by the storm. In general, waivers allow travelers to make one change to their itineraries without having to deal with regular flight change fees or fare recalculations.

If traveling today, travelers should expect disruptions in those cities to impact travel around the country, even in places where the weather isn't bad. For instance, a flight from Las Vegas to Phoenix could be delated if the crew scheduled to fly the plane are stuck in the east coast.

Those traveling should contact their airline directly to check for specific delays or cancellations.