It is very easy to add a day to a 3 day hopper ticket. Last year we planned 3 park days on our way back from Hawaii, but had to leave Hawaii early due to a tropical storm. I walked up to the ticket booth at DL with our 3 day hoppers and asked if we could add on 2 days, and it was done in less than 5 minutes. They charge you the difference in what you paid for a 3 day hopper, and the current cost of the 4 or 5 day hopper you are requesting. I'm not sure, but I think an adult 3 day hopper is currently $315 and an adult 4 day hopper is $335.00, so that would be $20 for the additional day. I think we paid $30 or $35 a ticket to add 2 days.
