I found relatively good fare PRG - LHR - LAX with a overnight stopover at LHR (arrive at LHR around 10pm and leave around 9am next morning) and I hope I know the answer but just to be 100% sure - will the agent at the PRG airport allows me to check in the bags only to LHR and all the way to LAX? Or in these overnight layovers they always check your baggage only to the layover destination?