DEL/EWR has been operational for the last two days ( B789). According to FlightAware the flight on 14th made it nonstop but 15th is scheduled to stop in BGR. The EWR/ DEL has apparently been operating nonstop all along ( B77W) but switched to a B789 on the 14th. Unclear what happened on the return since the Russia overflight ban ( except last two days) - maybe went through ORD.