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Thread: UA Flight Numbers and Numbering System
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Old Jan 12, 2015 | 7:15 pm
  #31  
Sykes
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Originally Posted by emcampbe
I wonder how far this carries over. For example, if flight XXX IAD-SFO changes to flight ZZZ IAD-SFO and departs at the same time, seems like it would have to be a replacement. But if they adjust the departure time, say XXX departed at 7:05 and ZZZ departs at 7:15, is this considered a replacement?
I don't see anywhere that the DOT is proscriptive about what constitutes a replacement, but I'm pretty sure that they XXX and ZZZ would be considered the same flight unless they added an additional frequency. I've seen flights that are operating on both a flight number and a departure time for the first time have operational stats on united.com.
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