Originally Posted by
psoque
The search from EWR for the exact same dates resulted in tons of flights in all fare classes. And I know that there are a plenty of United flights between IND and EWR on these days. Based on this, I’m convinced that all segments of the desired itinerary are available, but none of the websites (SAS, United, Air Canada, Google Flights, even ITA Matrix) could show this itinerary. So, there’s something really weird going on, and I need to find out how to get around it.
Economy fares often have combination restrictions in their rules. You can get around these by booking separate tickets for IND-EWR-IND and EWR-OSL/ARN-EWR, allowing enough time for IROPS (if SK is still in *A, you may be able to check bags across the tickets).