One Friday, I was connecting at DTW, from ATL to PHL. ATL-DTW arrived on time, checked monitored for connection flight, decided to walk over there, somewhere around A21, I heard last call boarding for DTW-PHL, which is the previous flight being delayed, but the display monitor clear did not show that. I guess once it passes its scheduled departure time, that flight information is gone. Is this correct? If it is true, how can I find out if there is an early flight being delayed so that I may take advantage of?

Thanks.

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Guiming Miao
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