According to the Massachusetts Institute of Technology, and the data collected from the 1995 time period to 2010.

SOUTHWEST’S pilots block hour costs went from $330 per hour in 1995 to $691 per hour in 2010, a 53% increase!!!

DELTA’S pilot block hour costs went from $707 in 1995 to $552 in 2010, a 22% decrease!!!

DELTA’S pilots, from their high in 2004 have taken a 46% decrease!!!!!!

Go to this web site:

Airline Data Project

select airline, then third line down, block hour statistics