A general rule of thumb is that all beverages are complimentary on intercontinental flights in all classes of service. International flights to Canada, Mexico, Caribbean island nations, etc. generally do not offer complimentary drinks in economy/coach. Also long, overwater domestic flights (e.g. to/from Honolulu, Hawaii; Agana, Guam; etc.) generally do not offer complimentary drinks in economy/coach.

If you have questions regarding schedules, aircraft configuration, inflight service, and the like, you may either call your airline or visit their website for more information. They are always glad to assist.

Continental Airlines
http://www.continental.com
1-800-PEANUTS

Delta Airlines
http://www.delta.com
1-800-221-1212