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Thread: How are "lifetime miles" calculated for MileagePlus?
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Old Nov 17, 2025 | 6:45 am
  #440  
IMissThe747
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Originally Posted by lincolnjkc
The base fare for a lap infant (excluding taxes, government fees, etc.) is $0, correct?

If so I would expect that they would not receive lifetime miles credit, see for example



I would expect lap infants to fall into the same processing rules as MP award tickets
When on an entirely UA-operated itinerary, the fare has indeed been $0.

Looking at one of the kids, she has some PQF, PQP, and RDM in her account, but 0 lifetime flight miles. Looking closer, that's because the only time this kid has had her own seat was on a CM-operated itinerary. She's had many segments and miles on UA operated flights as a lap infant, but only her own seat on one particular CM-operated itinerary.

So indeed it appears that BIS miles are only Butt In (your very own) Seat miles.

Thanks!
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