I can't remember when I last failed to upgrade on DL (maybe 3 years ago). FWIW, my most traveled routes were NYC to ATL, SMF, CHS, SEA, GIG (gone now), CDG and BOM. But I usually have the luxury of flexible dates.
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Vasant
[Edited for clarification]
[This message has been edited by vasantn (edited Mar 01, 2004).]