I looked into this as we are in WV, but decided to stay with Dulles. This is what we took into account with Hagerstown. They only leave on Mondays and Friday to MCO and only one evening flight. This would put us in Sanford around 9:30-10:00 depending on weather. My rental car of choice, National, closes at 10:00PM (not sure about others) so I would have to try to find an airline still open if the flight was late -- which is the norm for summer travel. You pay to choose your seat ($11 per person). You pay per bag pp ($15). You can carry on, BUT if you bag does not meet the guidelines and they have to gate check it there is a $35 fee. The good side is that parking at the airport is free. The return flight home again is on Monday and Fridays. We have been flying Jetblue or SW out of Dulles and I've been getting fares of $69-$74 each way on both airlines. No charge for seat and no charge for bags -- Plus you can use RAC to have your bags sent to the airport (JetBlue). We still always rent a car, but could choose DME if we wanted. The downside is you do have to pay to park at Dulles $10 a day, but we generally just have one of our kids drop us off and pick us up, so we don't pay parking. I've never heard anything bad about Alligeant, and it's nice that there is an option for Hagerstown (both of my adult kids live in Hagerstown). You just need to know all of the facts before making your decision.