The Avoid Delays web site confirms. The hour between 7 p.m. and 8 p.m. is Philly's worst for late arrivals.
Using U.S. Department of Transportation data from October 2007, the site selects the 7 p.m. hour as the worst time of the day to fly into Philadelphia International Airport.
Philly's 7 - 8 p.m. record is so bad that its the fourth worst hourly arrival stat for ANY U.S. airport.
The good news: It was worse in Nov. 2006, when a 7 p.m. Philly arrival time was the worst time to arrive in the whole country.
Linked at Consumerist, where a commenter responds:
Too bad this wasn't posted yesterday. I am at the airport, delayed flying back home to Philadelphia. Wonderful.