Next day Magical Express?

If we fly into MCO on a Friday night and stay at the airport, can we take Magical Express on Saturday? Or do they require you to board Magical Express as soon as you land?

You can get DME for any arrival method/date. Just pick an approximate flight number/time to tell them when you expect to arrive. This is also true for leaving WDW and going to the airport. Where you go next is totally independent of Disney. You just have to use the airport as the start/stop place. We’ve done it in conjunction with a non-Disney cruise, and using DME to go from airport to Disney hotel the night before a cruise, then DME to airport to catch cruise shuttle to ship.