I personally think codesharing is a great thing. It allows you to earn miles to so many more destinations. There is a law that airline and travel agency personnel must disclose "at the earliest reasonable opportunity" which carrier is operating the flight. It also prints on your itinerary, usually underneath the flight information, and says something like, "UA8828 operated by Lufthansa." Seems to me that as long as you read the itinerary, you will check in at the right place. As far as onboard announcements, I like the KLM version when they simply say, "Welcome aboard KLM flight 641 to New York. This flight is operated in cooperation with Northwest Airlines." Sounds simple enough. As far as the lost luggage comment, it's the responsibility of the carrier you arrived on to get the bags to you, so it makes no difference who lost it. If you flew CO on your final leg, they have to get the bag to you.



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