If you collect Avios in the UK, most redemptions go through British Airways — but Iberia often charges fewer Avios on the same partner aircraft, with no fuel surcharges on Iberia-operated flights.

Our take

Iberia Plus redemptions don't add fuel surcharges the way BA does — the same Avios go further on Iberia-operated routes.

Attribution: Summary and commentary by My Vacation Hub. Original reporting by A Luxury Travel Blog.