For the second day in a row during a busy holiday travel week, cloudy skies are causing delays and cancelations at Philadelphia International Airport.

By early afternoon, more than 150 flights arriving at or departing from the airport had been delayed, with nearly three dozen more cancelled.

The airport was warning travelers that weather could impact flights today. The Federal Aviation Administration said delays due to low clouds were causing average delays of an hour for arriving flights.

Similar weather issues disrupted plans for travelers on hundreds of flights on Tuesday. In total, 415 flights to or from the airport Tuesday were delayed, while 125 were cancelled, according to the flight-tracking website FlightAware.

Nearly 70,000 people in the Philadelphia region are expected to fly to visit family and friends this holiday season, according to AAA. That represents a 1.5-percent increase from the number who flew to holiday destinations last year, the travel group says.

The National Weather Service is calling for rain, with heavy showers expected at times, and fog to continue throughout the day.

The airport says travelers should check with their airlines for updated information, call the airport's flight-information line at 1-800-745-4282 (PHL-GATE) or check the airport website.

Contact Emily Babay at 215-854-2153 or ebabay@philly.com. Follow @emilybabay on Twitter.
Contact the Breaking News Desk at 215-854-2443 or BreakingNewsDesk@philly.com. Follow @phillydotcom on Twitter.