Wow, thanks much! Your reply is so info-rich - really valuable to me -and made me learn some ft lingo. I hadn't considered the equipment at all (sounds like I would have, after that particular direct flight). I also would not have guessed DTW was a better customs/transfer point.

My newbie mile-accumulating idea had been to add Texas: MSP-IAH-CDG on CO, suggested by their interactive map (http://continental.innosked.com). It adds 1400 miles each way, but if memory serves intn'l arrivals/transfers at IAH have been less than fun.

Heh, AND I finally saw that KLM and AF share one ff program.. Does anyone favor Flying Blue over CO, DL?

Merci Beaucoup!