Orlando Kennedy Space Centre was a downer for us.
I've been there, and it was a highlight of that trip. But it was quite a while ago.
We did hire a car as its a bit out of the way and we hate tour buses.
It was more geared toward school children. There are even theme park rides
The tour of the launch pads but most of the time we got taken to a sand dune somewhere and saw the launch pads from a distance. We did see a decommisioned space shuttle but could not do a close up.
I expect that we'll stay out at Titusville. My interest is in the Saturn display and the shuttle. You can get right up to the shuttle, which is displayed as if it's in orbit. When did you go there? The current display is only a couple of years old.
The launch pads are both leased out to ULR/SpaceX. They were impressive when set up for the shuttle but rather less so now.
There are two Saturn Vs on the route. One at KSC and the other in Houston. The Houston one was out in the weather for years but has recently been restored and is now a complete stack and indoors. The surviving shuttles are at KSC, Washington, and LA, so it might be possible to see all three.
A visit would be better if synchronised with an actual rocket blast off.
Yes... Sadly that is very much luck of the draw. When I last went there, we had tickets to get to the 3 mile (I think) viewing area (where the countdown clock is) for a shuttle launch. It turned out to be the only ever shuttle that launched ahead of schedule. It was a service mission to Mir, and they were having some major oxygen issues. So, missed that by a day. We went out for the landing, but it was held over due to large CB in the area. So, watching the shuttle trainer fly some approaches was as close as we got.
SpaceX has a lot of launches planned for 2020, but I they are so iffy that I wouldn't build a trip based on one.
We did visit an old USN aircraft carrier (Yorktown) in Charleston South Carolina with some old warbirds in the hangars. That was good.
I would recommend Charleston SC for the history and architecture as well.
I've done Intrepid. Unless one of my compatriots wants to see an aircraft carrier, and they're all RAAF, so I doubt it.
IAH as a staging point would mean the FF points would have to be UA, VA, SQ, NZ points and fly via AKL
Then intra USA it really does not matter that you stay with one airline alliance
SQ via Singapore to LA, and then across the Atlantic to Manchester, and Singapore again, is the most likely. Within the USA it will be whatever airline suits at the time. I doubt that we'll consider allegiances, so I can see Alaskan, United and Southwest being likely contenders.