UA: US Various-NRT-SIN from $760 ai RT (~4 cpm)
So I see this fare over the next few weeks, until end of June:
FLL-NRT-SIN-NRT-FLL (one day turnaround, arrive just after midnight, leave next morning at 5 am).
About $1200, for a total of just about 22K miles (depending on intermediate cities in US)
Similar fare/mileage but for fewer dates from IAD.
It's a lot of BIS time. Would this be a "mileage run"?