Originally Posted by SFOrunner

For example, SFO-FRA on 6/30/22 shows UA926 (with availability in Y) but does not show LH455. Lufthansa is selling this flight on Lufthansa.com.

Are the flight loads just so high that the codeshares aren't available? In general it feels like United is only showing me United operated flights and I'm not sure if this is because there literally isn't availability on partner flights, or something else?