I want to go to Vegas 16 to 23rd Dec via BA economy. Only a blue member BTW.

I not sure whether to book hotel + flight through BA for £778, I will get 5000 points for booking hotel & 11,362 for both flights.

I can use my 18,800 points & £65 to get the hotel at Flamingo and then the flight at £640. So £705 total. So in effect I would lose 23,800 points for £73.

I will be booking a flight to PHL in January so not sure whether to use my points for the hotel or keep them so thought I would ask on here.