More than 40 million people were under blizzard warnings along 700 miles of the East Coast from Maryland to Maine.

A powerful winter storm has already grounded thousands of U.S. flights, with more cancellations expected as heavy snow moves in.

American, Delta, JetBlue, United and others waived change and cancellation fees ahead of another massive winter storm.

Here's what travelers need to know about airline refund requirements, the best options to get rebooked and how the recent nor'easter could impact travel.

More than 450 flights to and from Boston Logan International Airport were canceled as of 7 a.m. Tuesday, according to FlightAware.com, a flight-tracking website. This was half of flights scheduled to leave the airport and 32% of flights coming to Boston.

Flights from Pittsburgh to New York City, Newark, Baltimore, Philadelphia, and Washington, D.C. are among those that have been cancelled.

50 percent of flights have been canceled out of Logan Tuesday, but Amtrak is hopeful that service will return for Tuesday’s morning commute. The post 50 percent of departing Boston Logan Airport flights canceled Tuesday appeared first on Boston.

Hundreds of flight cancellations were reported at Newark and other regional airports on Tuesday, Feb. 24, after Monday's historic snowstorm.