What if the modern day travelling through aeroplane has shortened the time between distant places? As suppose i think travelling from bombay to london is of considerable distance round the globe earth several kilometers and hours between. But the pilots somehow say some spell and a portal opens in the sky. And the time distance which is say 15 hours is reduced to 4 hours through time travelling portals. If these portals weren't been there or the pilots never knew of such things, would then there would had been considerable losses in fuel expenses and time too? what do you think?