Thanks for looking into that and highlighting the oddity of the Iberia UIO-MAD flight.
Originally Posted by
ernestnywang
I have reported the problem to Amadeus. Let's see if this can be resolved in the coming days.
I got the reply from Amadeus. They passed the response they received from IB to me, which says,
There is a rule in place that does not allow bookings from certain countries in segments between Ecuador and Spain. This is a company decision so we cannot lift the restriction.
It bewilders me but explains how come the flight is not bookable from various sources. I don't know if the restriction is only in place for the oneworld online tool and travel agencies, or even for other oneworld airlines if you call them.