Updated: Friday, 2:05 pm ET

Several major airlines are waiving change fees, as a fast-moving winter storm was expected to dump snow on a 1,500-mile Colorado runway in the center of the Atlantic coastline.

Southwest, Delta, United and Frontier have all removed charges for travelers using certain airports in the storm. Additional waivers were possible as the storm moved east, with forecasts for snow at major airports such as Denver, Indianapolis, Cincinnati, and Kansas City and Missouri airports in Missouri.

On Sunday, it was possible to accumulate snow for Washington Dulles and the Washington Reagan National, although current forecasts predict only 3 inches or less.

On Friday, about 215 flights were canceled nationwide at 14:05. AND, according to FlightAware Flight Tracking Service. Many of them were related to the storm, especially in Missouri, where some flights had been canceled in advance before the snow.

In St. Louis, about 70 combined arrivals and departures were canceled early in the afternoon on Friday. A handful of flights were canceled elsewhere in the country due to the storm, dubbed Winter Storm Gia by The Weather Channel.

Friday morning, United had launched two waivers. One of them covered his Denver hub and nine other Colorado airports. The second covered a dozen airports in the Midwest and Ohio Valley including Cincinnati, Indianapolis, Lexington and Louisville in Kentucky, Kansas City and St. Louis, Missouri. The Colorado waiver covered Friday flights while the Midwest waiver was valid for Friday and Saturday flights. The exemptions generally allowed eligible travelers to make a change to their itinerary without paying the standard change fee of $ 200 or more.

Frontier's policy was similar, covering its Friday flights to Denver and Colorado Springs.

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Southwest is unique among US airlines in that it does not charge a change fee. Its renunciations allow travelers to change their routes without paying the recalculated rate, which is the usual practice for all US carriers. Southwest's booking policy covers Friday and Saturday flights to Denver, Kansas City and St. Louis as well as Saturday and Sunday flights to Cincinnati and Indianapolis. By Friday afternoon, the Southwest waiver had been expanded to include flights on Saturday and Sunday at eight other airports (Baltimore / Washington, Charlotte, North Carolina, Greenville / Spartanburg, South Carolina). Louisville, Raleigh / Durham (North Carolina), Richmond (Virginia), Washington Dulles and Washington Reagan National).

Delta released its waiver late Friday morning, proposing a free change for customer tickets to cross Kansas City or St. Louis on Friday and Saturday.

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