Travelers returning home after the Thanksgiving holiday are in for a tough weekend of flying.

AccuWeather reported that a large swath of accumulating snow would spread from the Rockies and High Plains into much of the Midwest this weekend, creating substantial travel delays for drivers and airline passengers. As the system moves into the Midwest, AccuWeather said moderate to heavy snow will expand, making "travel along interstates 70, 80, 90 and 94 will be difficult with the potential for road closures due to accidents."

Over 1,100 U.S. flights had been scrapped as of around 12:40 p.m. ET on Nov. 29, with more than 3,400 delayed, according to flight-tracking site FlightAware. Chicago O'Hare International Airport and Chicago Midway International Airport have been hit the hardest, with 30% and 15% of originating flights canceled so far, respectively.

Here’s what to know if your flight is impacted.

What you’re owed if your flight is canceled, delayed

Travelers are owed refunds if an airline cancels a flight for any reason and they decide not to travel or accept other compensation, according to the Department of Transportation. The same goes for significant changes or delays.

Those include domestic flights that arrive at least three hours later than scheduled, or international flights that arrive at least six hours late. The DOT has a list of qualifying scenarios on its website, along with a dashboard outlining airlines’ commitments to customers in the case of controllable cancellations and delays. Consider reviewing those before heading to the airport.

Are airlines offering waivers?

Multiple airlines are offering waivers for travelers in the Midwest to adjust their flights without incurring a change fee. Here's a list of each airline offering a waiver:

American Airlines

United Airlines

Southwest Airlines

Frontier Airlines

Nathan Diller is a consumer travel reporter for USA TODAY based in Nashville. You can reach him at ndiller@usatoday.com.

This article originally appeared on USA TODAY: Over 1,100 flights canceled as Midwest snowstorm disrupts travel

Reporting by Nathan Diller, USA TODAY / USA TODAY

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