Thanks for your insight, Bill. I know that our flights numbers change all the time due to our growth as an airline. When I joined
Southwest 20 years ago, we did not use four digit flight numbers for scheduled service . I remember it being a big deal when we surpassed 1000 flights a day and those numbers came into play. Sometimes, for safety reasons we change flight numbers
because another airline is using the same flight number in the same airspace at the same time. That can drive the ATC folks
crazy.
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