I-4 should not be a problem at that time (midmorning).
North airport exit (436; Semoran Blvd.), then go left at first light (Frontage) instead of getting onto 528 (Beach Line) right away. Little over a mile is next light (Conway) and take two quick lefts to get onto 528 here.
Watch carefully for toll signs (one toll booth remains); you have to go down an "exit ramp" on the right to pay tolls in cash, then you merge back on to the main lanes. Only those with Florida electronic toll devices may use the main lanes straight through.
Then you get to I-4 West (southwest) to Disney.
Returning to airport via I-4 East (northeast) to 528 East, again watch for the "exit ramp" to pay tolls in caseh. Get off 528 at its exit 9 (Tradeport). Left and cross under. Get into middle lane. Required right onto McCoy. Little over a mile is 436 and airport entrance.