615 US flights canceled, nearly 3,400 delayed, amid Thanksgiving week winter storms

Amid winter storms, 615 flights have been canceled within, into or out of the U.S. as of Tuesday evening. The majority of them are at Denver International Airport in Colorado, according to flight tracking service FlightAware.

Denver's airport, a large connection hub for flights in the West, had 263 outgoing flights canceled and 226 incoming flights canceled as of 9:30 EST. In both cases that's about one-quarter of all fights at the airport.

In terms of delays: 3,366 flights within, into or out of the U.S. have been delayed; 332 outgoing flights and 309 incoming flights were delayed at Denver.

The airline with the most cancellations is Southwest, which canceled 207 flights and delayed 677.

Travel is 'going to be chaotic': Winter storm will dump a foot of snow from Rockies to Great Lakes

Major airlines waived flight change fees ahead of a snowstorm expected to bring a foot or more of snow to Colorado on Tuesday.

That means travelers booked for Tuesday flights through the Denver International Airport can try to get to their destinations early or choose to depart at a later date without a fee.

Airlines including American Airlines, Delta Air Lines and Southwest Airlines are also offering travel waivers for those traveling through Minneapolis.

Thanksgiving travel troubles were predicted this week as two storms track across the nation, bringing a miserable mix of rain, snow and wind from coast to coast.

The Denver metro area has already picked up 7 to 12 inches of snow, the Weather Channel said. Western sections of Boulder, Colorado, have seen up to 20.5 inches. The top storm total so far is 31.7 inches about 11 miles southeast of Estes Park, Colorado, the National Weather Service said.

Throughout the day on Tuesday, the storm will shift east and begin moving more quickly, bringing a swath of plowable snow from central Nebraska to southeastern Minnesota by the end of the day, AccuWeather said.

State government offices in Colorado on Tuesday are either closed or openings delayed across the state due to weather.

Contributing: Rebecca Powell, Fort Collins Coloradoan; Doyle Rice, USA TODAY; Associated Press

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This article originally appeared on USA TODAY: Thanksgiving weather 2019: Flights canceled amid winter storms