Originally Posted by berkeleybum
but I've never flown codeshare before, and next month my sister is flying DL metal with an NW flight number. At the airport, does she check in with Delta or Northwest?!
Always check in with the airline that operates your first flight that day.
Last month, I flew on DL metal out and a combination of CO and NW back. On the outbound, since DL metal was my first flight that day, I checked in with DL. When I returned, since the first flight that day was CO metal, I checked in with CO for all flights.
It helps to know what the operating airline's flight number is. (DL #6576 may actually be CO # 149.) This way, you can check the departure boards for that flight #. And you can also check on the operating airline's web site for the status of the flight.
It is not a dumb question. Many travelers also have the same question.
