FlyerTalk Forums - View Single Post - How does flight numbering decide whether continuation leg gets new UA flight number?
Old Apr 22, 2024 | 9:59 am
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Originally Posted by mduell
...There's some carve-outs in there too that aren't usable for scheduled flights.
Like "13", "69", and "666"
"911", also.
They're usable, but UA chooses not to use them, for various reasons.

Last edited by IAH-OIL-TRASH; Apr 22, 2024 at 10:04 am
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