A SWU will only work on AA operated and marketed flights (no codeshares).
Originally Posted by
iplaybass
This seems to be an issue going through NRT with a JL codeshare. Been looking at STL-NRT-SIN, and coming up with the same issue. BTW, if you can book these as separate trips, you might be able to save some money. Will an SWU work on a codeshare?