I'm fairly new to United and Star Alliance, returning after years with Delta and Alaska. This is my first particularly complex trip with them. It is a very long work trip for most of September and I want to make sure I don't pick flights that will not get me credited with as many miles as possible.

Here's the itinerary:

SFO --> NRT --> BKK (UA flight code but operated by All Nippon)

BKK --> SIN (Singapore Airlines)

SIN --> DEL (Looking at either Singapore Airlines direct, or Emirates through DXB. Don't ask. I'm being forced to consider it.)

DEL --> KTH (Air India)

KTH --> DEL (Air India)

DEL --> SIN --> INC (Singapore Airlines)

INC --> NRT (All Nippon, operated by Asiana Airlines)

HND --> SFO (United)


...In any of these scenarios will I accrue mileage at any rate less than I normally would on a flight operated and controlled directly by United?

I should note none of these are going to be basic economy. They will all be unrestricted economy fares. I may pay out of pocket to upgrade the longest legs to first.