I once booked a LAX-NRT-XXX via Google Flight and got PE the whole way when United.com only gave me Y NRT-XXX. Give Google Flights a shot and click through to United.com. It ended up being the same price.
Originally Posted by
autobahnal
I have an upcoming itinerary in Polaris to NGO (D fare), in which the last leg is a 738 from NRT-NGO on ANA Wings. The UA website only offers Y for sale (even though the 738s have business class equivalent upfront).