It is true that Iberia Visa Signature credit card has rather decent sign-up bonus and it will be probably enough for a flight to Hawaii, but unfortunately all airlines co-branded credit cards have many problems when it comes to redeeming earned miles. Firstly, you should carefully search for award ticket availability (better do it half a year before actual trip). Remember that airlines may have blackout dates for award tickets redemption and their quantity is highly limited. If you do not want to spend a lot of time and nerves searching for an award tickets, better consider applying to the general travel rewards credit card. It won’t be bound to one airline and you will have an opportunity to redeem your miles whenever you want.