Companion economy fares must be purchased together and on the exact same itinerary, no deviations permitted. (travxp.com)
If, within 24 hours after completing an airline ticket purchase on the Scotia Rewards Travel site or with a Scotia Rewards Travel Service Representative, you find a price for the exact same itinerary that's at least $ 10 less, Scotia Rewards Travel Service will offer you a points credit equal to the price difference, per passenger. (scotiarewards.com)
However, if you booked the exact same itinerary with the first flight on Iberia, take a look at the Avios required: (thepointsguy.com)