My friends and I already have a round trip ticket booked from CLT to FLL and want to do the drive from Fort Lauderdale to Key West on the way there. On the way back, on a Sunday - we want to book a one way flight from Key West to Fort Lauderdale (we won't be checking bags or anything). Our flight from FLL to CLT leaves at 6:45 on American Airlines ... we can either play it safe and land in FLL at 3:40, or we can leave Key West at 5:03 on United and land in FLL at 6:02 (then run to our 6:45 flight). Is that way too close? Thank you!