Massive winter storm hits US flights: More than 11,400 services cancelled as America freezes — Here's all we know

US weather update: A severe winter storm across the continental United States, caused widespread flight cancellations and delays across major airports across the country, impacting nearly 180 million people during the weekend, AP reported.

On Saturday (25 January) alone, more than 11,400 flights were canceled, particularly in the Northeast, at some of the country's busiest airports, it added.

The weather was freezing as more than half of the US population battled snow, sleet and cold rain in the area stretching from the southern Rocky Mountains to New England, AP said citing the National Weather Service late on Saturday.

The storm has moved into the US Northeast on Sunday and was expected to dump about 1 to 2 feet of snow from Washington through New York and Boston, it added.

Watch: Number of flights cancelled at Washington's Reagan International Airport

More than 3,000 flights were canceled for Monday, far fewer than over the weekend but a sign that airlines will need a day to recalibrate after the storm. Over 40% of Monday’s departures from New York’s LaGuardia Airport and John F. Kennedy Airport, and a third of the schedule of Newark Liberty International Airport in New Jersey, were canceled, as were more than 60% of those out of Boston.

Only 34 Tuesday flights were canceled thus far, however.

By Sunday afternoon, the majority of flights were canceled at busy airports in the Northeast and elsewhere. LaGuardia Airport in New York closed Sunday afternoon, according to the Federal Aviation Administration. The agency said on its website the busy Queens airport grounded flights until 8 p.m.

In Philadelphia, 94% of flights, 326 flights, were canceled. Ninety-one percent of flights, 436 flights, were canceled at LaGuardia Airport in New York. New York’s John F. Kennedy International Airport had 466 flights canceled, about 80% of flights, according to FlightAware.

Ronald Reagan Washington National Airport said on its website that all airlines had canceled departing flights for the day, about 421 flights.

Significant disruptions also hit major airport hubs in Dallas-Fort Worth, Charlotte, Philadelphia and Atlanta, home to the nation’s busiest airport.

Allan Lengel of Detroit planned to return Monday from Fort Lauderdale, Florida, where the temperature has been in the 80s. But he’s staying until Wednesday after Delta suggested he change his reservation because of the weather impact on flights.

“Can’t say I’m disappointed. Frankly, I had been thinking of returning later because of frigid weather,” Lengel, 71, said, referring to conditions in Michigan.

American Airlines had canceled over 1,790 flights for Sunday, about 55% of its scheduled flights for Sunday, according to FlightAware. Delta Air Lines reported over 1,470 cancellations and Southwest Airlines reported over 1,340 cancellations for the day, while United Airlines had about 1,016. JetBlue had more than 590 canceled flights, accounting for roughly 72% of its schedule for the day.

Vikrant Vaze, a Dartmouth professor specializing in commercial aviation logistics, said recovery from the storm cancellations and delays will take days if not longer. And even for travelers who aren't in areas that were directly affected by weather, cascading delays could still affect their travel plans.

“Because there are so many different airlines involved, I think it’s going to come down heavily to the individual airline's network structure, the extent of hit that each of them has had, and just the intrinsic capacity of the airlines to handle these massive disruptions,” he said.

My flight was canceled, now what?

If you’re already at the airport, get in line to speak to a customer service representative. If you’re still at home or at your hotel, call or go online to connect to your airline’s reservations staff. Either way, it helps to also research alternate flights while you wait to talk to an agent.

Most airlines will rebook you on a later flight for no additional charge, but it depends on the availability of open seats.

Can I get booked on another airline?

You can, but airlines aren’t required to put you on another carrier’s flight. Some airlines, including most of the biggest carriers, say they can put you on a partner airline, but even then, it can be a hit or miss.

Am I owed a refund?

If your flight was canceled and you no longer want to take the trip, or you’ve found another way to get to your destination, the airline is legally required to refund your money — even if you bought a non-refundable ticket. It doesn’t matter why the flight was canceled.

The airline might offer you a travel credit, but you are entitled to a full refund. You are also entitled to a refund of any bag fees, seat upgrades or other extras that you didn’t get to use.

(With inputs from AP)