How would I tell the shuttle driver if it's operational to stop at where SQ21 departs at from Terminal B? Remember there will be SQ Business Class flyers using the UA Polaris lounge and thanks for the answer. Regarding the SQ21/22 EWR-SIN-EWR the flight from EWR-SIN SQ21 has a poor timing to TR SIN-DVO for me and my brother. Should I do it as SQ23 JFK-SIN and then TR SIN-DVO to avoid SQ21 having an overnight layover for TR SIN-DVO? The return trip which is TR DVO-SIN does connect well with SQ22 SIN-EWR