In case of interest, there may be change(s) in BIS distance reporting in the UA database.

Historically, a trip like JFK-SFO-EWR would have earned 5,151 BIS (2,586 on JFK to SFO and 2,565 on SFO to EWR). However, having flown both routes within the last few days, UA has updated my lifetime miles at +5,153. Either one or both routes may have had some recent changes.

For the record, prior to the September trip, I haven't traveled between JFK and SFO since around mid-May, and between EWR to SFO since late January. Will be back on one of these routes later this month for additional data points.