Here is a copy of the July 1, 2004 worldwide timetable courtesy of the Internet Archive 'Wayback Machine' (a pretty cool site for those of who remember the web in its early years):
http://web.archive.org/web/200407260..._schedules.pdf

For other schedules go to:
http://web.archive.org/web/*/http://...schedules.pdfI

It's amusing to see ads for the 1000 miles bonus for booking online on some of the really early sites:
http://web.archive.org/web/*/http://www.delta-air.com/