Question regarding SQ - if we fly Sin-Nrt-USA with sin-nrt on Sq (separate ticket) and the. Nrt-USA on JAL (separate ticket) will Sq interline all the way through to USA? We needed to change a flight and the JAL sin-nrt flight doesn’t align correctly so we have to fly a different carrier, but we have checked luggage. We are skipping the much cheaper Zip in hopes that sq can accommodate.