Originally Posted by
VegasGambler
However, for international flights, there is often a huge penalty for booking one ways.
For LCCs like AS partners EI, FI and DE, not as much. Usually someone like BA/AA/AF/DL/LH/UA only sells full Y one way, leaving the LCCs to do the cheapo oneways. Of course the AS RDM/EQM you get is likely not much, if any.