Thousands of passengers were delayed at airports across the United States on Sunday, which is expected to be the busiest air travel day of the year. Most of those delays appear to be related to adverse weather conditions.
As of 4 p.m. ET Sunday afternoon, more than 2,300 flights were delayed and close to 400 canceled, according to FlightAware, which tracks airport delays.
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Denver International Airport was one of the airports experiencing the highest number of delayed flights, with 24% of outbound flights and 20% of inbound flights delayed due to low visibility, according to FlightAware. Forty-six inbound flights to Denver were diverted to other airports -- primarily Colorado Springs -- because of dense fog, ABC News reported. However, some planes were reportedly able to return to Denver later in the day.
On one of the busiest travel days at @DENAirport, this fog is delaying and diverting dozens of flights pic.twitter.com/EqjVIqLndu— Lindsay Watts (@LindsayAWatts) November 30, 2014
San Francisco International Airport was also reporting heavy delays due to wind. Inbound flights were averaging delays of nearly three hours at one point, according to FlightAware.
Don't ever fly to/from SFO, if you can help it. Stupid fog causing 3-hour delays today. Bay Area - you need a real international airport!— Tanya Bragin (@tbragin) November 30, 2014
Los Angeles- and Dallas-area airports also experienced significant delays earlier in the day.
[img src="http://admin.mashable.com/wp-content/uploads/2014/11/Screen-Shot-2014-11-30-at-11.22.33-AM-640x357.png" caption="Flight Aware's "misery map" for Sunday afternoon displays where the biggest airport delays in the country are." credit="Flight Aware" alt="Screen Shot 2014-11-30 at 11.22.33 AM"]
The Sunday after Thanksgiving is known to be one of the busiest airline travel days of the year. It was the top air travel day of the year in 2013, with 2.2 million airline passengers, according to the Transportation Security Administration.
Airport officials are encouraging passengers to check their flight status for delays before leaving for the airport.
Know before you go! Find out if there are any delays at the airport: http://t.co/XjeI1F4Yhy #Travel pic.twitter.com/P0Cq9HrUzx— The FAA (@FAANews) November 30, 2014