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Thread: How are "lifetime miles" calculated for MileagePlus?
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Old Dec 27, 2024 | 8:44 am
  #389  
Repooc17
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Originally Posted by 1NMFlyer
Hello,

How does UA calculate BIS (Butt In Seat) miles? Can't find that information on my ticket nor on their website. I'm ~35K BIS miles short of 1MM.

Thanks in advance.

Happy holidays!
BIS for a specific flight is the distance between origin airport and destination airport, and is tracked behind the scene by UA. Most of us keep our own flight data.

Personally, I use gcmap.com but there are tons of online resources.
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