Originally Posted by
roymustang
Just at a glance in SABRE, looks like the only one-way fares United has filed for Tokyo to SF are Y, J, and F fares, anything cheaper requires a roundtrip. While it's certainly debatable whether that's a good idea from a Rev Mgt perspective, it definitely appears that United.com is working as designed.
It is peculiar - I've always assumed that they're happy to take someone's Y fare (which aren't going to be many people choosing United from overseas), but if you want a discount fly roundtrip.