I'm using the OW RTW online tool for to see if it'll route me a trip in June 2026 I want which includes a flight between Quito (UIO) and Oslo (OSL) or vice versa. Although Iberia fly direct between UIO and MAD, the RTW only gives me two-stop options on American Airlines between Quito and Miami then Miami to Madrid followed by an Iberia flight between Madrid and Oslo.

I adjusted the dates a bit, but the tool never gives me a one-stop Iberia UIO-MAD-OSL. Is that a bug? I'm not an expert with OW. Also, it never gives a two-stop via LHR with BA, instead of MAD, with AA/IB - not that I would want that route.