Hello, I would like to share my recent experience with One World booking.
I planned to fly from CGK to SCL via DOH and GRU (the itinerary would be CGK - DOH - GRU - SCL), the CGK - DOH - GRU segments will be flown on QR but the GRU - SCL segment will be flown on LATAM, all in one single ticket.
Qatar Airways has 3 flights from CGK - DOH (QR 955, 957 and 959). If I tried to start my journey on flight QR 959, I will always be directed to DOH - MAD on QR 151 and MAD - SCL on Iberia IB 117. It seems that only QR 955 and 957 can be used to avoid flying with Iberia.
Any idea why? Is this one of T&Cs of QR's partnership with IB?