Bad weather has caused the cancellation of 3,100 flights, mostly at the busiest airports in the United States.

Bad weather has caused the cancellation of 3,100 flights, mostly at the busiest airports in the United States. If people want to travel by plane in the past two days, it is best to check flights online or contact the airlines first...

If people want to travel by plane in the past two days, it is best to check flights online or contact the airlines first. According to information from FlightAware.com, as of 5 p.m. Eastern Time today, more than 3,100 flights have been cancelled. The number of canceled flights continues to increase.