I'm planning a trip to Germany during the last week of November and wanted to get pricing as to whether it is cheapest to fly to DUS, TXL, FRA, or MUC. The only info I was able to obtain were fares to FRA. Since KLM flies to the other cities and CO has an alliance with KLM, I was wondering why KLM codeshare flights were not listed on the CO website. I've seen Virgin Atlantic and Air France flights listed (for other cities) but not KLM. Does anybody know why that is the case? Is the KLM relationship different from that of Virgin and AF? I can still accrue Elite miles on KLM, can't I? Just to verify, I went to the destinations section of the CO website and saw all the KLM cities listed so this makes me even more confused. Any help is greatly appreciated.

Thanks,
Analise