Originally Posted by KentownFlorida
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I am due to fly on a CO flight number on NW Metal from Montreal, can you experts advise me do I check-in with CO or NW?
Sorry AA - CRJ and no First/Business Class mean no revenue for you [and no miles for me unfortunately]
But I would rather loose the miles than fly Coach in a Sardine Can.

You always check in with the airline operating the flight.