hope someone can help the best way to go about this booking (feel free to move to another forum if better suited)

I need to book 2 one-way tickets on 3/7/19 from UVF to MCO. The pricing for the MIA-MCO leg (best routing) is making it quite pricey so we're looking at the UVF-MIA option and then just driving up after an overnighter. Flight options for UVF-MIA are

AA1550 13:22 - 17:08 or AA2295 15:48 - 19:40

Both flights are coming up to around £500 for 2 with Baggage, but I'm wondering if there's a good way to use Avios/rewards to get this as AA are part of oneworld (the reward finder keeps trying to do UVF-LGW-MCO!). I think I've managed to get the AA avios flights on BA for 20k Avios + £296 but doesn't inc. baggage by defauly, but trying to see if theres:

1) a cheaper option with baggage
2) a way to get the MIA-MCO (or TPA if an option) let added

Got approx 48k Avios to use, but potential access to more if required.

Thanks