Of the big airports, here's the top 10 with the worst on-time performance percentage, based on the 2007 Department of Transportation stats, via WSJ.

Airport / On-time percentage

10. Dalla/Ft. Worth (DFW) 71.0%
9. Miami (MIA) 70.7%
8. Washington, D.C. (DCA) 70.1%
7. Charlotte, N.C. (CLT) 69.3%
6. Boston (BOS) 68.6%
5. Chicago (ORD) 65.8%
4. Philadelphia (PHL) 65.6%
3. New YorK (JFK) 60.9%
2. New York (LGA) 59.9%
1. Newark (EWR) 59.6%

Try to avoid these airports, if you can.

(Photo: Maulleigh)