Join Date: May 2012
Location: Munich, Algarve, Sussex or S.F Bay Area
Programs: Mucci, BA Gold, A3*Gold, LH SEN, HH Gold, Marriott Plat, IHG Plat Amb
Posts: 5,604
You cannot do HAM-MCO on OneWorld with only one transfer, unless you include Aer Lingus via, Dublin, which I wouldn’t.
If you want just a single change then you’re on Skyteam via AMS or Star via FRA. Neither of those are particularly enticing. I also found having LHR-MCO a nicer experience as I hate the minimum of 4 hours you realistically have to leave for the pleasure.
Having said that, the immigration and general international arrival experience in MCO is often very poor. You may find that HAM-LHR-JFK/PHL-MCO is a much smoother and more relaxed routing.