I think including the travel time to town centre is a good idea. At least it gets rid of the shenanigans that Ryan air does, where they say Frankfurt and the ai

I think including the travel time to town centre is a good idea. At least it gets rid of the shenanigans that Ryan air does, where they say Frankfurt and the airport is in the middle of nowhere (1.5h from Frankfurt). Also many travellers (except for locals) need to go to the town centre anyway if they need to access other modes of transportation. And if not, they likely would have looked up their itinerary anyway.