I haven’t seen any figures supporting that - do you have a citation? https://ourworldindata.org/travel-carbon-footprint https://ourworldindata.org/travel-carbo

I haven’t seen any figures supporting that - do you have a citation? https://ourworldindata.org/travel-carbon-footprint https://ourworldindata.org/travel-carbon-footprint has data from 2022 for passenger-kilometers in the UK: Domestic flight 246 g Diesel car 171 g Petrol car 170 g Short-haul flight 151 g Long-haul flight 148 g Motorbike 114 g Bus (average) 97 g Bus (local London) 79 g Plug-in hybrid 68 g Electric car 47 g National rail 35 g Tram 29 g London Underground 28 g Coach (bus) 27 g Ferry (foot passenger) 19 g Eurostar (to Paris) 4 g So the only way that could be true would be if the bus was significantly emptier than the plane so the same emissions were amortized over an order of magnitude fewer passengers. Moreover, this ignores the future: there’s a straightforward path to electrifying a bus which has been deployed in production for years but no proven alternative for planes.