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Thread: When does United do the upgrades
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Old Jul 31, 2012 | 8:43 pm
  #11  
raehl311
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I would bet they run the upgrade engine every hour for all flights within an hour's window. I.e. at 6:30 they run for all flights departing 6:00 to 6:59. (I made those numbers up, could be anything similar.)
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